5^th World congress on Chemical Engineering and Catalysis August 28-29, 2018 Holiday Inn Paris – Marne La Vallée | 2 boulevard du Levant, 93160 Noisy-le-grand, Paris, France

Biography:

Antonio Greco has received his Master’s degree in Materials Engineering at University of Lecce in October 1998. He has received his PhD degree in Materials Science and Technology in May 2001. From December 2002, he become an Assistant Professor at University of Salento. He keeps scientific collaborations with several Italian and International research institutions. He has around 80 papers in international journals (h-index=21) and 60 presentations at international conferences, most of them are about innovative polymer based materials.

Abstract:

This work is aimed at the valorization of the organic fraction of urban solid waste through the stabilization and the inertisation in thermoplastic and thermoset resins. After being ground, the organic waste was subjected to a stabilization process; different procedures were used in order to obtain a partial or complete removal of the bacterial activity. Afterwards, the inertisation process was carried out through the incorporation of the organic waste into water soluble thermoplastic and thermoset matrices. Samples produced were tested by using differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA), in order to evaluate the water content of the mixture. The viscosity of the material was then assessed through rheological analysis, thus allowing to understand times and temperatures necessary for the polymerization, in case of the thermoset matrix, or for the evaporation of water, in case of the thermoplastic one. Flexural and compressive tests were carried out on samples obtained after inertisation. Results showed good values of flexural and compressive strength. Also, the influence of the residual water content on the mechanical properties was studied, and an increase of the compressive modulus with the increase of the water content was found. Finally, different amounts of foaming agents were added to the mixtures during the inertisation; compressive tests were then carried out to evaluate the influence of the voids on the mechanical properties

Biography:

K M Oghenejoboh is an Associate Professor of Chemical Engineering at the Delta State University, Abraka – Nigeria. His area of specialization is environmental studies. He who holds a PhD in Chemical Engineering is an Erudite Scholar and the Head of the Bio-environmental Laboratory of the University. He has published more than 35 research articles in reputable high impact journals covering a wide range of environmental issues. He attends and presents papers at major international environmental conferences annually.

Abstract:

The study investigated and evaluated the feasibility of using a cost-effective biosorbent developed from the mixture of ripe and unripe plantain peels for copper (II) bioremoval from simulated industrial wastewater. The mixture of ripe and unripe plantain peel was modified with phosphoric acid and chitosan to produce acid-treated plantain peels (APP) and plantain peels-chitosan composite (PP-CH) biosorbent. The effects of experimental conditions: initial copper (II) concentration, agitation time, agitation speed and biosorbent concentration on the biosorption process were evaluated. The results showed that copper (II) biosorption was dependent on the experimental conditions. The kinetics data from the experiment fitted well to the pseudo-second-order model, suggesting chemisorption mechanism, while the biosorption mechanism was film diffusion-controlled. Freundlich and Dubinin-Radushkevich (D-R) isotherm models provided the best correlation (> 0.99) of the equilibrium data. The maximum monolayer sorption capacity (Qmax) was found to be 27.40 and 23.81 mg/g for PP-CH composite and APP, respectively. The D-R mean free energy (E) values of 10.4 and 10 kJ/mol for PP-CH composite and APP respectively confirmed the assumed chemisorption mechanism of the process. The percentage recovery of copper (II) (78-95%) with the use of inorganic acids (H₂SO₄ and HNO₃) as eluents was also evident of the suggested mechanism. Therefore; modified plantain peels have the potential as biosorbent for the effective remediation of copper laden wastewater.

Biography:

Retnam Bharathi Ganesan is currently working on removal of emerging contaminants from water by adsorption using activated carbon. While pursuing his PhD in Chemical Engineering at Indian Institute of Technology Madras, India; his research area includes but not limited to mass transfer and process intensification. He is interested in transplanting ideas from nature to Chemical Engineering processes and vice versa to understand nature. He has received his Bachelor’s at NIT Trichy in 2011, India and Master’s at IIT Kanpur, India during 2014 in the field of Chemical Engineering. He has worked as a Contractual Lecturer for a semester at Department of Chemical Engineering, NIT Srinagar, India during May 2015.

Abstract:

Numerous emerging contaminants are being detected in effluents of dense urban settlements and pharmaceutical industries. Simultaneous removal using activated carbon adsorption is an effective way of removing these traces compounds. However, multicomponent adsorption studies on emerging contaminants are rather limited. In literature, processes such as nanoparticle impregnation, thermal, acid, base and aqueous treatment on activated carbon increased the adsorption performance in terms of rate or capacity. In present study, microwave was applied to activated carbon at three different conditions namely, dry, wetted and immersed in solution. The volumetric heating provided by microwave affect the particles directly with higher heating rate compared to conventional heating. These modified carbons were used for simultaneous removal of a ternary system. Dry carbon subjected to microwave heating had improved adsorption which may be attributed to changed porous structure and removal of certain surface functional groups. For wetted carbons, microwave effect is seen in two stages. First, until sulfuric acid gets evaporated, desired surface functional groups are introduced, later on the pore structure gets widened which leads to higher performance while adsorption. Thus, for wetted carbon, lower power treatment reduced the performance while higher power and time improved the performance. Microwave heating applied onto activated carbon immersed in acid resulted in poor performance. Microwave modifications in dry and wetted conditions show promising scope for intensification and better performance.

Biography:

Chang Liu has received his BS and MS degrees from Anhui Normal University (China) in 2012 and 2015, respectively. He is currently pursuing his PhD in Southest University, China. His current scientific interests are focused on developing novel nanomaterials for bio-sensors and catalytic application. He has published five papers in reputed journals as first author.

Abstract:

Ingenious design and fabrication of metal nanomaterials have become versatile tools for the advancement of nano-catalysis technique. Polyhedral noble metal nanocages have gained great attention due to their porous walls, hollow interiors, high porosity, and potential applications in diverse areas such as electrocatalyst, bio-microcapsule, and photothermal materials etc. Based on this, we designed a novel co-reduction approach to obtain a series of octahedral alloy nanocages by employing Cu₂O as template and copper source. Various noble metals and magnetic metals could be introduced discretionarily to obtain different multi-metallic nanocages. Among them, typically, the structure and peroxidase-like activity were investigated systematically by using Ni-introduced CuAu nanocages as the prototype, and relevant parameters of enzymatic activity were also tested. Compared with mono-metallic nano-octahedrons, alloy nanocages have superior catalytic activity, and such magnetic catalyst could still keep relatively high catalytic efficiency after several cycles. Moreover, the optimal pH and reaction temperature in this peroxidase mimetic system are very similar to the optimal active condition of natural horseradish peroxidase (HRP). The high specific surface area of cage-like nanostructure provides more active sites, and the extra magnetism (recyclability) and low cost endow them potential commercial value. It is anticipated that these multi-metallic nanocages have practical application value in the field of organic catalysis and enzymatic reactions.

Biography:

Individual and simultaneous adsorption of Acid Orange 10 (AO10) and Acid Blue 74 (AB74) dyes were carried out on steam activated carbon. The individual and binary equilibrium isotherms were generated for different pH and temperature conditions. The ‘Hill’s Model’ based on statistical physics principles (Lotfi et al., 2015) was used to fit the isotherms. The three parameters of this model viz. number of adsorbed molecules per site (n), density of receptor sites (N_m) and equilibrium concentration of adsorptive in the solution at half saturation (C_1/2) were estimated by fitting the experimental data to the model. This approach helped to explain the stearic and energetic interactions between the adsorptive and the adsorbent. Among the different forms of the Hill’s model, the Multi-Layer Model (MLM) was found to satisfactorily fit the equilibrium data of either dye on the adsorbent. This led to the conclusion that the adsorption is multi-layer rather than mono-layer. This model helped in understanding the competitive effects involved between the dyes. The stearic hindrance parameter values revealed that one adsorptive may inhibit the adsorption of the other. During single component adsorption, it was found that for the given dosage of adsorbent, the percentage removal of AO 10 was more than AB 74 by 20%. In binary adsorption, hindrance factor of AB 74 was found to be 40% more than AO 10 which led to reduced equilibrium loading of the former. This trend is observed at all conditions of pH. The enthalpy of adsorption was also estimated using the Hill’s model and the adsorption of both the dyes was found to be exothermic.

Abstract:

Saif Ul Mehdi has completed his graduation from Chaitanya Bharathi Institute of Technology, Hyderabad. He is currently pursuing research at Indian Institute of Technology. He is currently working in the Field of Adsorption.

Biography:

Bor-Yann Chen has expertise in biomass energy and environemntal biotechnology.  His serial stuides focused on applications in wastewater treatment, bioremediation engineering, biofuel cells.  He completed PhD from University of California, Irvine in 1995 and used to be NRC awarded Research Associate to work in NRMRL/US EPA, Cincinnati Ohio.  He is Professor, Department of Chemical and Materials Engineering, National I-Lan University, Taiwan. He has published 150⁺ SCI-peer reviewed papers in reputed journals and has many National Awards (e.g., Professor Yen-Ping Shih Best Paper Awards of 2007, 2011, 2013 and 2016 from Taiwan Institute of Chemical Engineers).        
 

Abstract:

This first-attempt study used extracts of appropriate antioxidant abundant Camellia and non-Camellia tea and medicinal herbs as model electron shuttles (ESs) to stably augment bioelectricity generation performance in microbial fuel cells (MFCs).  As ESs (or redox mediators) could stimulate electron transport phenomena by considerable reduction of electron transfer resistance, the efficiency of power generation for energy extraction in microbial fuel cells (MFCs) could be appreicably augmented.  That is, using environmentally friendly natural bioresource as green bioresource of ESs is the most promising to sustainable practicability.  As comparison of power-density profiles indicated, supplement of Camellia tea extracts would be the most appropriate, then followed non-Camellia Chrysanthemum tea and medicinal herbs.  Moreover, antioxidant activities, total phenolic contents and power stimulating activities were all electrochemically associated.  In particular, the extract of unfermented Camellia tea (i.e., green tea) was the most promising ESs to augment bioenergy extraction compared to other refreshing medicinal herb extracts

Biography:

Dr. Kigho Moses Oghenejoboh who is currently an associate professor in environmental studies at the Delta State University, Abraka – Nigeria holds a PhD in Chemical Engineering. He is an ardent scholar and the head of the Bio-environmental Laboratory of the University. He has published more than 35 papers in reputable journals covering a wide range of environmental issues. He also attends and present papers at major international conferences on environment annually

Abstract:

Effective waste management require a multidisciplinary approach with Chemical Engineering as the fulcrum. The problem of sustainable waste management is as old as creation itself, for the creator of the universe put ecological cycle in place to effectively manage waste generated in the universe either through recycling or conversion into useful products. It can rightly be said then, that the Almighty God started the profession of Chemical Engineering. However, over the years, man had succeeded in destroying this perfect system put in place by God either through greedy manipulation of the system or out of ignorance. Over the past decades, Chemical Engineers in collaboration with Biotechnologists and Environmentalists have been working tirelessly to see how wastes generated from various industrial processes including the agro-based industries can be used sustainably in the treatment of industrial wastewater, generate energy or converted to useful chemical products. Agricultural wastes are unwanted materials produced from agricultural processes like growing of crops or raising of animals. One area of great success is the use of agricultural crops waste as polymerized biochar for the adsorption of lethal heavy metals from wastewater. In tropical Africa like Nigeria, an important agricultural product that generates a lot of waste is cassava, a vital staple delicacy. The leaves, peels, stems and wastewater from the processing of this agricultural product poses great environmental nuisance. However, the leaves, peels and stems are currently being put to economic use either as animal feed or as biomass for wastewater treatment. Research is presently on-going in the utilization of the large volume of wastewater generated from cassava processing for the cultivation of microalgae. In this review, the potential of cassava wastewater in growing microalgae for algae crude production is enumerated. The economic benefit of the venture as a supplement to Nigeria’s dwindling fossil fuel reserve as well as its positive impact on environmental sustainability are discussed.

Biography:

Yenny Meliana has completed his PhD in 2012 from National Taiwan University of Science and Technology. She is Head of Research Management Division, Research Center for Chemistry-Indonesian Institute of Sciences (LIPI). She has published more than 20 papers in reputed journals and has been serving as an editorial board member of reputable journal such as Indonesian Journal of Applied Chemistry, Indonesian Polymer Journal, etc.

Abstract:

The increasing usage of nondegradable packaging plastic causes environmental matters. The development of degradable or bioplastic has become an alternative solution to those matters. Chitosan was one of the bioplastic materials that can be used as packaging. Bioplastic film was made of chitosan which has low barrier properties. In improving those properties, the study was performed with a film made of chitosan-PLA mixture with a ratio of 10:0; 9:1; 8:2; 7:3; and 0:10. The films were tested for tensile strength, percent elongation, melting point, moisture permeability, and antimicrobial activity. The interactions among constituent components were characterized by a Fourier transform infrared spectrophotometer (FTIR), whereas a film surface structure was observed using scanning electron microscope (SEM). The chitosan-PLA mixture film has a tensile strength and a smaller elongation percentage throughout the increasing of PLA ratio. Based on the FTIR spectrum, the interaction between chitosan and PLA are physically occurred. The chitosan-PLA film barrier has been reported decreasing. The chitosan-PLA bioplastic film has a lower melting point than its constituent components. The surface of the chitosan-PLA film was not homogeneous. The chitosan-PLA blend film can inhibit or kill gram positive or negative bacteria

Biography:

Khalidah Al-Dalama is a research scientist in Kuwait institute for scientific research, she has completed her B. Sc in Chemistry from Kuwait university.  she was a division director of operations of petroleum research center of KISR for 4 years (2013 to 2016), in addition to her administration experience, khalidah had a very good experience in hydrotreating catalyst development and catalyst deactivation, She Worked mainly as project leader and principal investigator for several projects in the area of Hydrotreating catalyst development and catalyst deactivation in petroleum research center. She published more than 20 scientific papers in international refereed journals.

Abstract:

In the present work, Studies on the kinetics of adsorption of molybdenum and nickel, which are used as active metals in hydrotreating catalysts, were completed using four different supports (i.e.,  γ - Al2O3 , SiO2  - Al2O3, TiO2 – Al2O3,  and ZrO2 – Al2O3). The effects of pH and temperature of the impregnation solution on the extent of adsorption of these metals on different supports were studied. Adsorption isotherm measurements for Mo and Ni were also made using different supports. A theoretical model to simulate the adsorption isotherm of Mo was developed. Good agreement between the experimental and predicted values for Mo adsorption was observed for all four supports (γ- Al2O3, SiO2 – Al2O3, TiO2 – Al2O3 and ZrO2 - Al2O3) used in the studies.

The important results and conclusions are as follows:

• The pH of the impregnation solutions used for loading the active metals (Mo and Ni) on the support surface by adsorption had a remarkable effect on the uptake of the metals.
• Adsorption occurred by electrostatic interaction between the OH groups on the support surface and the molybdate or Ni ions in the solution.
• The extent of Mo adsorption on different supports decreased in the following order at a given pH (5.1):

γ – Al2O3 > ZrO2 – Al2O3 > TiO2 – Al2O3 > SiO2 – Al2O3

• The amount of nickel adsorption was highest for SiO2 – Al2O3 and lowest for γ – Al2O3.

Biography:

Sara RONASI has completed his PhD and postdoctoral studies from University of Lorraine in France, Nancy at the age of 32 years. She is senior researcher at Norner Research, a global R&D partner in polymer and plastic industry. Expert in chemical engineering, project manager and responsible for process development using CO₂ as a feedstock for novel polyols and polymers in Norner.   
 

Abstract:

Carbon dioxide is an abundant, renewable, non-toxic and inexpensive carbon feedstock that can be used for the production of value added chemicals and materials, including plastics. The selective transformation of CO₂ into polymers in the copolymerization with epoxides using a range of homogeneous and heterogeneous catalysts has been known from late 60’s. Poly(propylene carbonate) (PPC), made from CO₂ and propylene oxide (PO), is one such polymer showing promising properties for various applications.

Development of robust and versatile catalytic systems that are able to work under industrially acceptable conditions while achieving excellent yield and selectivity toward polycarbonates has been the main topic of research in this field in recent years. However, the development of the polymerisation process has been lagging behind due to lack of knowledge on the phase behaviour, reaction rate, conversion and viscosity evolution during the polymerisation.  In this regard, computational methods for prediction of these parameters can be helpful but still experimental data are necessary as an input for model development and model application in process design.

In this work, different in-situ measurement techniques (ATR-FTIR, Raman spectroscopy, viscosity and density) were used to characterise the process parameters. Empirical models based on polymerisation tests done in industrially relevant bench scale set-up operated in a semi-continuous mode were developed and challenges in quantification and modelling of this process are discussed

Biography:

Arief Ameir Rahman Setiawan is a researcher of Industrial Engineering at the Indonesian Institute of Sciences. He pursued the master degree from Graduate School of Industrial and Management System Engineering, Waseda University, Tokyo. His position currently is Head of Technology Management Subdivision of the Research Center for Chemistry (RCC) of the Indonesian Institute of Sciences (LIPI). His research is about quality system, life cycle assessment, and ergonomics and human factors. At present, he is also trusted as administration manager of ISO 17025:2017 at RCC LIPI, managing editor in chief of Indonesian Journal of Applied Chemistry and managing editor member of Indonesian Journal of Life Cycle Assessment and Sustainability.

Abstract:

The issue on chemical safety and security has been addressed by many scholars and industrial practitioners in a couple of recent decades. Handling chemicals and chemistry processes, including restriction of its access, have becoming critical issues to minimize risk and prevent illegal or anti social use of chemicals. Interdisciplinary approaches to resolve with this issue has also been arising, including using ergonomics and human factor perspective. Ergonomics and Human Factors is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data and methods to design to optimize human well-being and overall system performance. This research will study the perspective of this discipline to cope with issue of chemical safety and security, based on a number of references. Potential application in the Research Center for Chemistry (RCC), Indonesian Institute of Sciences (LIPI) is also investigated, particularly to explore the compatibility with the implemented quality system in RCC LIPI such as ISO 17025:2017. A framework of application will be also proposed to conclude the study and recommend the improvement.

Biography:

Abstract:

Radioactive waste contains many important elements like cesium ion. Generally, the separation of these elements is expensive and exotic. However, electrically switched ion exchange (ESIX) process is attractive method for separation which involves an ion exchange film deposited onto an electrode surface. In this study, a graphite electrode was used and nickel hexacyanocobaltate was introduced into the graphite electrode to improve the capacity for cesium ion separation. X-ray tomography was used to characterize nickel hexacyanocobaltate inside the electrode and FTIR was used to characterize the prepared material. Cyclic voltammogram was used to measure the ion exchange performance. This technique was found to enhance both the removal capacity of cesium and stability of the ion exchange process compared to other techniques.

Biography:

Abstract:

Electrochemical reduction of CO₂ to low carbon organic compounds has been considered as a promising method to mitigate the greenhouse effect and produce useful energy carrying chemicals. However, the development of catalyst with high activity, selectivity, and good stability is still the bottleneck to accomplish this goal. Cu based catalysts have been reported to meet such requirement. In this work, we prepared CuO nano needle and CuO/graphene nano-flower catalysts using polyol method. The catalyst was examined using XRD, SEM/EDS and electrochemical testing methods etc. Results indicate that CuO/graphene nano-flower exhibits a high catalytic activity for CO₂ conversion to formate with a Faradic efficiency of 60% (Nano needle) and 75% (Nano flower) under -1.1V vs.SHE. We also will demonstrate membrane electrolyte assembly based device for CO₂ electrochemical reduction. In where, the CuO/graphene nano-flower catalyst is coated on gas diffusion layer as the cathode.

Biography:

The author received her B.E. and M.E. degree from Southeast University (China) in 2008 and 2011, respectively. She is currently completing the Ph.D in Southest University, China. Her current scientific interests are focused on developing novel nanomaterials for bio-sensors and catalytic application. She has published several papers in reputed journals as first author.

Abstract:

Gold nanostars, as one of plasmonic nanostructures, have been recently reported to yield extraordinary field enhancements for SERS, especially at the tip of their branches. It has been reported that gold nanostars show stronger SERS enhancement than nanorods and nanospheres under similar experimental conditions. Thus, the combination of these two aspects may provide a solution to the fabrication of a low-cost, large-scale, and reproducible SERS active substrate. We study the assembly of gold nanostars as reproducible SERS substrates via electrostatically assisted APTES-functionalized surface-assembly method and detect the SERS activities. The gold nanostars were immobilized on ITO surface by using electrostatically assisted APTES-functionalized surface-assembly as SERS active substrates. A comparison of these substrates’ optical characteristics and SERS efficiency as a function of branch length was made, and the potential use of these substrates in quantitative detection applications was also investigated. There are two main advantages of our substrates: firstly, the fabricating progress of this substrate is simple, low-cost, reproducible, and equipment-independent, thus it is possible for large-scale production, even for commercial manufacture; secondly, the obtained substrates have extremely good uniformity, which is preponderant for biosensing. Moreover, by employing the TAT Peptideconjugated Au nanostars (AuNSs) as an intracellular probe, we developed a method for the identification of LR-MSC differentiation by surface-enhanced Raman scattering (SERS) spectroscopy. By PCA analysis of the SERS spectra, we have demonstrated that cellular components and cytoarchitecture have been changed during differentiation.

Biography:

Mojtaba Mirdrikvand has completed his master studies in chemical and energy engineering field from Otto-von-Guericke-Universität Magdeburg in Germany. He is currently working as Ph.D student in in-vivo-MR group of the University of Bremen. His current research aims at developing and optimizing NMR techniques to characterize mass transport and reaction processes in porous media.

Abstract:

The in-situ analysis of catalytically gas phase reactions offers not only an accurate characterization of the reactions but also the possibility to validate numerical simulations. The latter allows optimizing operational performance and reducing industrial costs as well as predicting possible risks at scaled up reactors. Accurate measurement of temperature profiles along radial and axial direction of the reactor requires non-invasive approaches to obtain a realistic assessment of the operating systems, without interfering with the process. Among in-situ approaches, Nuclear Magnetic Resonance (NMR) offers a huge flexibility to perform various direct and indirect spatio-temporal measurements for heterogeneous systems. In this work, two NMR techniques were implemented to obtain a quantitative temperature analysis for a broad temperature range. Magnetic Resonance Spectroscopic Imaging (MRSI) and Diffusion Weighted Magnetic Resonance Imaging (DW-MRI) were applied on a 7T MRI system to assess temperature profiles in the reactor environment and the catalyst bed at high temperatures. The first approach, MRSI, uses capillaries (OD: 0.3-0.6 mm) filled with ethylene glycol as thermometers for temperature measurements in the range of 20-150 °C by evaluating the chemical shift difference between the CH3 and the OH signal. However, the MRSI approach depends on a sufficient spatial homogeneity of the magnetic field, which limits the applicability in some cases. Therefore, the second method, DW-MRI, was implemented as a fast and robust toolkit for measurements in a broader temperature range (T<350 °C), being more robust against magnetic field inhomogeneities than MRSI. The optimized 3D DW-MRI method acquires images with high spatial resolution (~ 0.5⨯0.5⨯1.5 mm3) using four different diffusion sensitizing gradients corresponding to different diffusion weightings (b-values). Fitting the measured signal intensities S(b) in each voxel according to S=S0*exp(-bD) allows to determine the temperature dependent diffusion coefficient D, and thus the temperature. Initial experiments used glycerol as probing liquid. To enable measurements of temperature up to 350 °C, high-boiling ionized liquids are currently investigated.

Biography:

Salome Tkemaladze Chemist, master’s degree program student. She is working at GTU Vladimir Chavchanidze Institute of Cybernetics (Georgia).  Scope of scientific interests: chemical science, analytical chemistry, chemical expertise, chemical engineering.  She has 8 publications. She is a participant of the grant project # 216770 - “New type fire-extinguishing powders and foam-suspensions based on local mineral raw materials “funded of the National Science Foundation.  She had participated in some international conferences and congresses:   Elenite Holiday Village, Bulgaria; Lisbon, Portugal a and   Tbilisi, Georgia. She have some years of experience in the study and evaluation of fire–extinguishing and fire- protective materials

Abstract:

The aim of the presented investigation is the selection of local mineral raw materials for production of new types, environmental safe, highly effective fire-extinguishing powders. As is known, the commonly produced fire-extinguishing powders are rather expensive and cannot satisfy the modern demands, in the first place with the view point of effective, non-toxic and environmentally safe using.  Most of them are halogen containing.  Therefore, development of halogen free, non-toxic, environmentally safe fire-extinguishing powders is currently a very important problem. Local mineral raw materials - zeolite, clay shale, perlite, dolomite, barite-calcite and ammophos are taken as the basis for receiving such powders. At destruction at high temperatures of the mentioned raw materials the emission of asphyxiating gases and toxic matters does not happen. Raw materials were selected according to their high-performance properties and due to the factors indicating the reduction of combustion processes, which can be predicted using the results of chemical and thermal gravimetric analysis. Such raw materials mainly contain alkali and alkaline-earth metal carbonates, bicarbonates, oxalates, silicates, Fe, Al and alkali metal hydroxides, crystallization water. At their Intensive heating incombustible gases, water steam and metal oxides are separated.  Incombustible gases and water steam in flame zone are functioning as phlegmatizer and in surface zone are causing the formation of swelled layer. Protective films of metal oxides swelled, and coked layer cause a strong “fire-limiting” effect. This indicates the fact that they are characterized by high inhibition properties. It is stated, that zeolites in composite powders can act as efficient hydrophobizing agents. Thus, the introduction in zeolite containing composite powders of raw materials: dolomites, barite-calcites and ammophos which are hygroscopic, but characterized with high inhibition properties are not cause significant changes of performance properties, but considerably increase fire -extinguishing capacity.  It allows to create a wide range of zeolite-containing fire-extinguishing powders on the basis of local mineral raw materials

Biography:

Lali  Gurchumelia, Chemist, Doctor of Technical Sciences. I work TSU Rafael Agladze Institute of Inorganic Chemistry and  Electrochemistry  (Georgia). Scope of scientific interests: chemical science, chemical engineering, ecological engineering, ecological biotechnology.  I have 55 publications, including in the Infactactatorial Journal -12. The last 10 years I have participated in 5 scientific grant. Currently I am a manager of the grant  # 216770 -   “ New type fire-extinguishing powders and foam-suspensions based on local mineral raw materials “  funded of the National Science Foundation. I  participated in many international conferences and congresses:  Nürnberg, Germany;   Toledo, Spain;   New Forest, UK; Montreal, Canada;   Istanbul, Turkey;  Elenite Holiday Village, Bulgaria; Rome, Italy; Paris, France;  Yerevan-Vanadzor;  Tbilisi, Georgia and  Ureki, Georgia.  I have many years of experience in the study and evaluation of fire–extinguisghing and  fire- protective materials.

Abstract:

 The aim of the presented investigation is the development of technology for production of novel, halogen-free, environmentally safe, highly efficient fire-extinguishing powders based on local mineral raw materials, which does not require modification with expensive, halogen-inclusive, hydrofobizing additives, providing low-cost production of fire-extinguishing powders in comparison with imported analogues. The optimal dispersity was selected in such way, that caking capacity be minimal and a homogeneous action of combustion products on the flame as well as a heterogeneous inhibition of combustion process must take place. The evaluation   of powder efficiency is carried out with consideration of the both effects.

Experimental data confirm that the developed fire-extinguishing powders are characterized with high performance characteristics, as well as high fire-extinguishing capacity. At the same time it should be noted, that the efficiency of the obtained powders is practically the same as of standard imported powders, but do not contain any halogens, is environmentally safe and 1.5-2 times cheaper than the imported and For obtained powders, the conditions of extinguish optimum and effective use of powder are stated. Optimum extinguishing condition means the selection of optimum intensity of powder supply into seat of fire when minimum consumption of powder provides fire extinguishing in minimum time. Thus, in order to determine optimum conditions of extinguishing it is necessary to study the dependence of powder specific consumption and extinguishing time to supply intensity.  For our powders optimum condition of extinguish is: powder supply intensity I-0.6-1.0 kg/m²sec to fire center when powder specific consumption does not exceed G=0.8-1.2 kg/m²

    Therefore, we can surmise that the use of fire-extinguishing powders of our preparation is possible at extinguishing of all types of fires over ground, as well as, underground constructions and does not need additional antiseptic measures.