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Hydrogen And Carbon Nanostructure Formation From Methane Cracking Over Iron And Zeolite Based Catalysts
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Book Synopsis Hydrogen and Carbon Nanostructure Formation from Methane Cracking Over Iron and Zeolite Based Catalysts by : Abdulrahman Alharthi
Download or read book Hydrogen and Carbon Nanostructure Formation from Methane Cracking Over Iron and Zeolite Based Catalysts written by Abdulrahman Alharthi and published by . This book was released on 2014 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Production of Fine Carbon Nanoparticles and Hydrogen-rich Gas from Laser-thermal Cracking of Methane Using Regenerable Iron Based Catalyst by : Shenghong Qiu
Download or read book Production of Fine Carbon Nanoparticles and Hydrogen-rich Gas from Laser-thermal Cracking of Methane Using Regenerable Iron Based Catalyst written by Shenghong Qiu and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes, having remarkable material properties, hold tremendous potential applications. Among the synthesis methods, cracking of natural gas (methane) is one of the effective ways, which also produces hydrogen without any CO2 emission. The reaction energy in conventional methods is usually supplied by burning some feedstock, which results in low thermal efficiency. A new approach, direct laser irradiation, will give an environmentally clean and efficient process to produce carbon nanoparticles. Some exploratory studies on catalytic laser-thermal cracking of methane were carried out at UTSI. Regenerable iron-based (Fe/Al2O3) catalyst made by soaking-drying technique was employed for the cracking reaction of methane. TGA and electric furnace set-up were also used to evaluate the catalyst. A TEA CO2-laser was employed as a heat source in the laser-based experiments, where different reactor modes, like fluidized- bed, basket and fixed bed reactor, were tried. The experiments on catalyst regeneration were also carried out. Three cycles of cracking/regenerations were tried. The black carbon in final catalyst residues was examined by optical microscope, SEM and X-ray diffraction analyses. It was shown that the laser-based cracking approach could eventually be utilized for the production of carbon nanoparticles and hydrogen-rich gas. However, more additional experiments are needed to find optimal conditions and reactor configurations for cracking reaction and production of carbon nanoparticles.
Book Synopsis Theoretical Investigation of Catalytic Methane Cracking and Carbon Nanotube Growth by : Jingde Li
Download or read book Theoretical Investigation of Catalytic Methane Cracking and Carbon Nanotube Growth written by Jingde Li and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mesoporous Zeolites by : Javier García-Martínez
Download or read book Mesoporous Zeolites written by Javier García-Martínez and published by John Wiley & Sons. This book was released on 2015-05-26 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authored by a top-level team of both academic and industrial researchers in the field, this is an up-to-date review of mesoporous zeolites. The leading experts cover novel preparation methods that allow for a purpose-oriented fine-tuning of zeolite properties, as well as the related materials, discussing the specific characterization methods and the applications in close relation to each individual preparation approach. The result is a self-contained treatment of the different classes of mesoporous zeolites. With its academic insights and practical relevance this is a comprehensive handbook for researchers in the field and related areas, as well as for developers from the chemical industry.
Download or read book Hydrogen Energy written by Dragica Minic and published by BoD – Books on Demand. This book was released on 2012-10-17 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen economy represents the future of human civilization. Limited resources of our planet are compelling us to turn to renewable clean energy resources and hydrogen figures prominently as the energy carrier of a future sustainable energy system. There are significant challenges to be overcome in order to make hydrogen viable, in production, storage and power generation, while safety of operation is an ever-present factor that determines success or failure of a proposed solution. Recent developments in all of these aspects are reviewed in this book, along with some latest research in the field of hydrogen energy and use.
Book Synopsis Co-production of Hydrogen and Carbon Nanofilament from Methane Decomposition Over Nickel-supported Y Zeolite Based Catalyst by : Md Nasir Uddin
Download or read book Co-production of Hydrogen and Carbon Nanofilament from Methane Decomposition Over Nickel-supported Y Zeolite Based Catalyst written by Md Nasir Uddin and published by . This book was released on 2014 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Catalyst Deactivation by : J.L. Figueiredo
Download or read book Progress in Catalyst Deactivation written by J.L. Figueiredo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most catalysts used in the chemical and petrochemical indus tries are strongly affected by one or another form of deactivation, leading to poor performances and reduced life. The increasing num ber of scientific communications devoted to the subject in recent years, and culminating with an International Symposium held in Antwerp in October 1980, is a measure of the interest it arouses in both the industrial and academic communities. A stage has been reached whereby it was thought that a NATO Advanced Study Institute on "Catalyst Deactivation" might be fruit ful in establishing the state of the art and in stimulating a more systematic research on the phenomenon. Such a meeting was held ~n Lagos, Portugal, from 18 to 29 May 1981. The purpose of the Institute was to present and discuss in a didatic and systematic way the various processes that lead to cata lyst deactivation, namely coking, poisoning and solid state trans formations, and at the same time to promote the exchange of ideas and experiences among the participants, drawn from industry and uni versity. The lectures presented at the Institute are collected in this volume with the exception of Dr. L.L.Hegedus "Catalyst Poisoning", which has been previously published (Catalysis Reviews, Science md Engineering, 23, 377-476, 1981).
Book Synopsis Hydrogen Production from Carbon Dioxide Reforming of Methane Over Ni/KH Zeolite Catalysts by : Athiya Kaengsilalai
Download or read book Hydrogen Production from Carbon Dioxide Reforming of Methane Over Ni/KH Zeolite Catalysts written by Athiya Kaengsilalai and published by . This book was released on 2006 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DIRECT DECOMPOSITION OF METHANE TO HYDROGEN ON METAL LOADED ZEOLITE CATALYST. by : Daniel M. Ginosar
Download or read book DIRECT DECOMPOSITION OF METHANE TO HYDROGEN ON METAL LOADED ZEOLITE CATALYST. written by Daniel M. Ginosar and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The manufacture of hydrogen from natural gas is essential for the production of ultra clean transportation fuels. Not only is hydrogen necessary to upgrade low quality crude oils to high-quality, low sulfur ultra clean transportation fuels, hydrogen could eventually replace gasoline and diesel as the ultra clean transportation fuel of the future. Currently, refinery hydrogen is produced through the steam reforming of natural gas. Although efficient, the process is responsible for a significant portion of refinery CO2 emissions. This project is examining the direct catalytic decomposition of methane as an alternative to steam reforming. The energy required to produce one mole of hydrogen is slightly lower and the process does not require water-gas-shift or pressure-swing adsorption units. The decomposition process does not produce CO2 emissions and the product is not contaminated with CO -- a poison for PEM fuel cells. In this work we examined the direct catalytic decomposition of methane over a metal modified zeolite catalyst and the recovery of catalyst activity by calcination. A favorable production of hydrogen was obtained, when compared with previously reported nickel-zeolite supported catalysts. Reaction temperature had a strong influence on catalyst activity and on the type of carbon deposits. The catalyst utilized at 873 and 973 K could be regenerated without any significant loss of activity, however the catalyst utilized at 1073 K showed some loss of activity after regeneration.
Book Synopsis Nitrogen Doped Carbon Catalyst for the Oxygen Reduction Reaction to be Used for Methane Partial Oxidation by : Andrew K. Craft
Download or read book Nitrogen Doped Carbon Catalyst for the Oxygen Reduction Reaction to be Used for Methane Partial Oxidation written by Andrew K. Craft and published by . This book was released on 2017 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methane (CH4) is a plentiful, naturally occurring hydrocarbon, and the main constituent of natural gas. Due to its abundance, it has been well studied as both a feedstock for chemical production and as a fuel. Recently, methane has become of interest due to it's release into the atmosphere as a result of human activities. Rather than capture and use methane, companies opt to flare methane, as it is more environmentally and economically friendly. In 2012, these practices led to over $1 Billion lost in fuel. A recent breakthrough involving the use of hydrogen peroxide (H2O2) in the partial oxidation of methane to liquid chemicals at ambient conditions has been made. This process, used an iron based zeolite catalyst, and moderate concentrations of peroxide. Although peroxide is produced inexpensively industrially, there are cost and safety concerns with shipping the product to the remote fields where it would be used in this process. Nitrogen doped carbon materials have been identified as promising electrocatalysts for the oxygen reduction reaction (ORR). ☐ Here, the synthesis and subsequent testing of a NDC catalyst is reported. KIT-6, a mesoporous silica was used as a hard template, with an ionic liquid being the carbon and nitrogen precursor. Powder x-ray diffraction, N2 adsorption, scanning electron microscopy, and elemental analysis were used to characterize the template and resulting catalyst. Pore size distribution of KIT-6 can be influenced by slight changes in the synthesis procedure. This was utilized in an attempt to change the properties of the final catalyst. Slight changes in the hydrothermal ageing temperature changed the pore distribution in template, and the ECSA was significantly increased as a result. Rotating Disk Electrode (RDE) testing shows that the catalysts have high selectivity (90%) towards H2O2. A RDE is not a production method that can be used industrially. In the best circumstances, it would take over 4 hours to accumulate the required amount of H2O2 used by Hammond et al. Mass transport of the reactants to the surface of the catalyst hinders the overall activity. A flow cell type device can help overcome these limitations by delivering the reactants directly to the catalyst surface. Current densities of 50 mA cm-2 with selectivity around 60% was achieved in the tested flow cell. This device would require ~40 minutes to produce the necessary amount of peroxide to be used if scaled up to 25 cm2.
Book Synopsis Modelling and Experimental Study of Methane Catalytic Cracking as a Hydrogen Production Technology by : Ashraf Mukhtar Lotfi Amin
Download or read book Modelling and Experimental Study of Methane Catalytic Cracking as a Hydrogen Production Technology written by Ashraf Mukhtar Lotfi Amin and published by . This book was released on 2011 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Production of hydrogen is primarily achieved via catalytic steam reforming, partial oxidation, and auto-thermal reforming of natural gas. Although these processes are mature technologies, they are somewhat complex and CO is formed as a by-product, therefore requiring a separation process if a pure or hydrogen-rich stream is needed. As an alternative method, supported metal catalysts can be used to catalytically decompose hydrocarbons to produce hydrogen. The process is known as catalytic cracking of hydrocarbons. Methane, the hydrocarbon containing the highest percentage of hydrogen, can be used in such a process to produce a hydrogen-rich stream. The decomposition of methane occurs on the surface of the active metal to produce hydrogen and filamentous carbon. As a result, only hydrogen is produced as a gaseous product, which eliminates the need of further separation processes to separate CO2 or CO. Nickel is commonly used in research as a catalyst for methane cracking in the 500-700C temperature range. To conduct methane catalytic cracking in a continuous manner, regeneration of the deactivated catalyst is required and circulation of the catalysts between cracking and regeneration cycles must be achieved. Different reactor designs have been successfully used in cyclic operation, such as a set of parallel fixed-bed reactors alternating between cracking and regeneration, but catalyst agglomeration due to carbon deposition may lead to blockage of the reactor and elevated pressure drop through the fixed bed. Also poor heat transfer in the fixed bed may lead to elevated temperature during the regeneration step when carbon is burned in air, which may cause catalyst sintering. A fluidized bed reactor appears as a viable option for methane catalytic cracking, since it would permit cyclic operation by moving the catalyst between a cracker and a regenerator. In addition, there is the possibility of using fine catalyst particles, which improves catalyst effectiveness. The aims of this project were 1) to develop and characterize a suitable nickel-based catalyst and 2) to develop a model for thermal catalytic decomposition of methane in a fluidized bed.
Book Synopsis Plasma Catalysis by : Annemie Bogaerts
Download or read book Plasma Catalysis written by Annemie Bogaerts and published by MDPI. This book was released on 2019-04-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, N2 fixation for the synthesis of NH3 or NOx, methane conversion into higher hydrocarbons or oxygenates. It is also widely used for air pollution control (e.g., VOC remediation). Plasma catalysis allows thermodynamically difficult reactions to proceed at ambient pressure and temperature, due to activation of the gas molecules by energetic electrons created in the plasma. However, plasma is very reactive but not selective, and thus a catalyst is needed to improve the selectivity. In spite of the growing interest in plasma catalysis, the underlying mechanisms of the (possible) synergy between plasma and catalyst are not yet fully understood. Indeed, plasma catalysis is quite complicated, as the plasma will affect the catalyst and vice versa. Moreover, due to the reactive plasma environment, the most suitable catalysts will probably be different from thermal catalysts. More research is needed to better understand the plasma–catalyst interactions, in order to further improve the applications.
Book Synopsis The Role of Hydrogen in Methane Formation from Carbon and Water Over Metal Catalysts by : Stanley Edwin Moore
Download or read book The Role of Hydrogen in Methane Formation from Carbon and Water Over Metal Catalysts written by Stanley Edwin Moore and published by . This book was released on 1982 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Pyrolysis of Biomass by : Robert C Brown
Download or read book Fast Pyrolysis of Biomass written by Robert C Brown and published by Royal Society of Chemistry. This book was released on 2017-07-07 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast pyrolysis and related catalytic pyrolysis are of increasing interest as pathways to advanced biofuels that closely mimic traditional petroleum products. Research has moved from empirical investigations to more fundamental studies of pyrolysis mechanisms. Theories on the chemical and physical pathways from plant polymers to pyrolysis products have proliferated as a result. This book brings together the latest developments in pyrolysis science and technology. It examines, reviews and challenges the unresolved and sometimes controversial questions about pyrolysis, helping advance the understanding of this important technology and stimulating discussion on the various competing theories of thermal deconstruction of plant polymers. Beginning with an introduction to the biomass-to-biofuels process via fast pyrolysis and catalytic pyrolysis, chapters address prominent questions such as whether free radicals or concerted reactions dominate deconstruction reactions. Finally, the book concludes with an economic analysis of fast pyrolysis versus catalytic pyrolysis. This book will be of interest to advanced students and researchers interested in the science behind renewable fuel technology, and particularly the thermochemical processing of biomass.
Book Synopsis Nanotechnology in Catalysis 3 by : Bing Zhou
Download or read book Nanotechnology in Catalysis 3 written by Bing Zhou and published by Springer Science & Business Media. This book was released on 2007-09-05 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume continues the tradition formed in Nanotechnology in Catalysis 1 and 2. As with those books, this one is based upon an ACS symposium. Some of the most illustrious names in heterogeneous catalysis are among the contributors. The book covers: Design, synthesis, and control of catalysts at nanoscale; understanding of catalytic reaction at nanometer scale; characterization of nanomaterials as catalysts; nanoparticle metal or metal oxides catalysts; nanomaterials as catalyst supports; new catalytic applications of nanomaterials.
Book Synopsis Alternative Energy Resources by : Paul Kruger
Download or read book Alternative Energy Resources written by Paul Kruger and published by John Wiley & Sons. This book was released on 2006-03-10 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: A balanced introduction to tomorrow's energy sources Over the course of the next fifty years, there will be a shift in the quest for sustainble energy, including a major change in transportation from internal combustion engines burning petroleum-derived fuels to newer technology engines using new transportation fuels. Alternative Energy Reources examines our options for energy sources with a focus on hydrogen as a large-scale, secondary energy vector parallel to electricity. As the price of petroleum products increases, the world is scrambling to find a suitable replacement energy source. In this comprehensive primer, Professor Paul Kruger examines energy use throughout history and the exponential expansion of our energy use beginning with the Industrial Revolution through the present day. The book then analyzes the various alternative energy sources available, including renewable energy (hydroelectric, solar, wind, biomass, and geothermal), nuclear, and hydrogen. He addresses each energy source's pros and cons based on our needs, availability, and environmental impact aspects. Finally, Dr. Kruger proposes the use of hydrogen as a fuel to sustain our energy supply produced by appropriate technology mixtures of renewable and nuclear energy.
Book Synopsis Chemical Catalysts for Biomass Upgrading by : Mark Crocker
Download or read book Chemical Catalysts for Biomass Upgrading written by Mark Crocker and published by John Wiley & Sons. This book was released on 2020-03-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference to the use of innovative catalysts and processes to turn biomass into value-added chemicals Chemical Catalysts for Biomass Upgrading offers detailed descriptions of catalysts and catalytic processes employed in the synthesis of chemicals and fuels from the most abundant and important biomass types. The contributors?noted experts on the topic?focus on the application of catalysts to the pyrolysis of whole biomass and to the upgrading of bio-oils. The authors discuss catalytic approaches to the processing of biomass-derived oxygenates, as exemplified by sugars, via reactions such as reforming, hydrogenation, oxidation, and condensation reactions. Additionally, the book provides an overview of catalysts for lignin valorization via oxidative and reductive methods and considers the conversion of fats and oils to fuels and terminal olefins by means of esterification/transesterification, hydrodeoxygenation, and decarboxylation/decarbonylation processes. The authors also provide an overview of conversion processes based on terpenes and chitin, two emerging feedstocks with a rich chemistry, and summarize some of the emerging trends in the field. This important book: -Provides a comprehensive review of innovative catalysts, catalytic processes, and catalyst design -Offers a guide to one of the most promising ways to find useful alternatives for fossil fuel resources -Includes information on the most abundant and important types of biomass feedstocks -Examines fields such as catalytic cracking, pyrolysis, depolymerization, and many more Written for catalytic chemists, process engineers, environmental chemists, bioengineers, organic chemists, and polymer chemists, Chemical Catalysts for Biomass Upgrading presents deep insights on the most important aspects of biomass upgrading and their various types.
