Download or read book New Catalysts for Hydroprocessing Transition Metal Carbides and Nitrides written by Sasangan Ramanathan and published by . This book was released on 1995 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Catalysts for Coal Processing written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this project was to study transition metal carbides and nitrides as catalysts for hydroprocessing. In particular, the goals were to study the solid-state transformations that occur during synthesis of the compounds using a temperature-programmed method, and to investigate the catalytic properties of the materials for the upgrading of model coal liquids at realistic process conditions.
Download or read book New Catalysts for Coal Processing written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this research project was to investigate the catalytic properties of a new class of materials, transition metal carbides and nitrides, for treatment of coal liquid and petroleum feedstocks. The main objectives were: (1) preparation of catalysts in unsupported and supported form; (2) characterization of the materials; (3) evaluation of their catalytic properties in HDS and HDN; (4) measurement of the surface properties; and (5) observation of adsorbed species. All of the objectives were substantially carried out and the results will be described in detail below. The catalysts were transition metal carbides and nitrides spanning Groups 4--6 in the Periodic Table. They were chosen for study because initial work had shown they were promising materials for hydrotreating. The basic strategy was first to prepare the materials in unsupported form to identify the most promising catalyst, and then to synthesize a supported form of the material. Already work had been carried out on the synthesis of the Group VI compounds Mo2C, Mo2N, and WC, and new methods were developed for the Group V compounds VC and NbC. All the catalysts were then evaluated in a hydrotreating test at realistic conditions. It was found that the most active catalyst was Mo2C, and further investigations of the material were carried out in supported form. A new technique was employed for the study of the bulk and surface properties of the catalysts, near edge x-ray absorption spectroscopy (NEXAFS), that fingerprinted the electronic structure of the materials. Finally, two new research direction were explored. Bimetallic alloys formed between two transition metals were prepared, resulting in catalysts having even higher activity than Mo2C. The performance of the catalysts in hydrodechloration was also investigated.
Download or read book Hydroprocessing Catalysts And Processes The Challenges For Biofuels Production written by Bo Zhang and published by World Scientific. This book was released on 2018-04-09 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for hydroprocessing catalysts has shown an increasing trend, because of their applications in refining of petroleum and biofuels, in order to comply with strict environmental regulations controlling emissions from transportation vehicles.Transport fuel is dominated by fossil fuels with carbon emission intensive production methods. If we are to move away from these sources, the alternative is to produce liquid fuels from agricultural stocks — crops, crop waste, forestry waste or algae. Converting these feedstocks into high quality fuels is a considerable challenge.By describing the current status in processing agricultural feedstock into high quality liquid transport fuels, the authors set out the means to develop better chemistry and catalysis for the necessary conversion processes. This book offers an intriguing insight into the mechanisms and protocols involved in new hydroprocessing catalysts and processes, and covers the methods for upgrading these liquids to modern transport vehicles suitable for operation in modern gasoline and diesel engines.It provides an introduction to the mechanism of hydroprocessing reactions, application of different metals in hydroprocessing, the effect of catalyst supports, applications in refining new feedstock, renewable fuels standards, the management of spent hydroprocessing catalysts, and hydrogen production.Hydroprocessing Catalysts and Processes will prove useful for both researchers in academe and industry concerned with future fuels development and treatment to produce current and future liquid transport fuels.
Download or read book New Catalysts for Coal Processing written by and published by . This book was released on 1995 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our project deals with the investigation of a new class of catalysts for processing coal liquids. The catalysts are supported carbides and nitrides of transition metals. These compounds are unique because they have properties similar to those of the precious metals, but are resistant to sulfur. Because they have high hydrogenation activity in the presence of sulfur, they are ideal for coal processing. For our initial work we have decided to start with unsupported carbides and nitrides in order to identify the best possible composition for work with supported catalysts. The research includes synthesis, characterization, and testing of the compounds.
Download or read book Advanced Catalytic Materials Current Status and Future Progress written by José Manuel Domínguez-Esquivel and published by Springer Nature. This book was released on 2019-10-02 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents advances in computational methods, experimental synthesis, and advanced characterizations for novel catalytic materials. The authors show how catalytical materials can be used for various engineering oil & gas applications – mainly in low contaminants fuel production. All contributors, describe in detail novel experimental and theoretical techniques techniques and concepts for synthesis, evaluation and scaling catalytic materials and research advances in evaluation, extensive characterization and theoretical modeling using computer assisted methods and algorithms. Describes computational methods, experimental synthesis and advanced characterization for novel catalytic materials; Examines catalytic materials and corresponding engineering applications with a focus on low contaminant fuel production and derivatives; Covers the application of computer assisted quantum mechanical for fundamental understanding of electronic structure of molecular dimension catalytic materials.
Download or read book Synthesis and Characterization of Group V Metal Carbide and Nitride Catalysts written by Heock-Hoi Kwon and published by . This book was released on 1998 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalytic Conversion of Energy Resources into High Value Added Products written by José Luis Pinilla and published by MDPI. This book was released on 2021-09-02 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing active, selective and energy-efficient heterogeneous catalysts is of paramount importance for the production of high value-added products from energy resources in a more sustainable manner. In this Special Issue of Energies, we provide a showcase of the latest progress in the development of cleaner, more efficient processes for the conversion of these feedstocks into valuable fuels, chemicals and energy. Most of the works collected are focused on the conversion of biomass which clearly reflects the paramount importance that the biorefinery concept will play in the years to come.
Download or read book Carbon Alloys written by E. Yasuda and published by Elsevier. This book was released on 2003 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years the Japanese have funded a comprehensive study of carbon materials which incorporate other elements including boron, nitrogen and fluorine, hence the title of the project "Carbon Alloys". Coined in 1992, the phrase "Carbon Alloys" can be applied to those materials mainly composed of carbon materials in multi-component systems. The carbon atoms of each component have a physical and/or chemical interactive relationship with other atoms or compounds. The carbon atoms of the components may have different hybrid bonding orbitals to create quite different carbon components. Eiichi Yasuda and his team consider the definition of Carbon Alloys, present the results of the Carbon Alloys projects, describe typical Carbon Alloys and their uses, discuss recent techniques for their characterization, and finally, illustrate potential applications and future developments for Carbon Alloy science. The book contains over thirty chapters on these studies from as many researchers. The most modern of techniques, particularly in the area of spectroscopy, were used as diagnostic tools, and many of these are applicable to pure carbons also. Porosity in carbons received considerable attention.
Download or read book Electric Refractory Materials written by Yukinobu Kumashiro and published by CRC Press. This book was released on 2000-08-24 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exploration of electric refractory materials, this book covers developments of blue light-emitting diodes using GaN-based nitrides for laser and high-temperature and -frequency devices. Electric Refractory Materials introduces growth and evaluation standards of films and bulk crystals, with consideration of band structure, surface electronic structure, and lattice vibrations. It also covers heat capacity and thermal conductivity, irradiation properties, and selective surfaces. Focusing on diamond material, the book examines its synthesis and characterization as well as its electrical, optical, and conductive properties. The book also discusses the use of silicon carbide, boron compounds, and other material used in electronic and light-emitting devices.
Download or read book Integrated Forest Biorefineries written by Lew Christopher and published by Royal Society of Chemistry. This book was released on 2013 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book documents the recent accomplishments of integrated forest biorefineries and their future in the pulp, paper, and fiber-processing industries.
Download or read book New Catalysts for Hydrodesulfurization written by Brian Diaz and published by . This book was released on 2001 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Advancements in Biofuels and Bioenergy Utilization written by Prakash Kumar Sarangi and published by Springer. This book was released on 2018-09-29 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concerns relating to global warming, climate change, and increasing energy demands have led to significant research towards the development of alternative energy to substitute the fossil energy sources. Biomass-based energy or biofuels are highly promising due to many perceptible environmental and socio-economic advantages. Cutting-edge academic research and advanced industrial product development have created tremendous scope for the implementation of biofuels at a global scale to reduce the greenhouse gas emissions and supplement the escalating energy demands. The prime focus of this book is to provide an overview of the different technologies utilized to harness the chemical energy from plant-based non-edible biomass and other organic wastes in the form of solid, liquid, and gaseous biofuels. The opportunities and challenges of different biomass conversion technologies, especially biomass-to-liquid, biomass-to-gas and gas-to-liquid routes, as well as biomass pretreatments, densification, anaerobic digestion, reforming, transesterification, supercritical fluid extraction, microalgal carbon sequestration, life-cycle assessment and techno-economic analysis have been comprehensively discussed in this book. This book is an amalgamation of fifteen different chapters each with distinctive investigations and a collective focus relating to the transition from fossil fuels towards carbon-neutral biofuels. This book serves as a benchmark for academic and industrial researchers involved in exploring the true potentials of plant residues and waste organic matter to produce alternative renewable fuels. To realize the real promises of bioenergy, this book attempts to assess the biorefining approaches, biofuel production and application, and environmental sustainability.
Download or read book New Catalysts for Coal Processing Metal Carbides and Nitrides Final Report Setpember 11 1991 September 10 1994 written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanomaterials in Biomass Conversion written by Komal Rizwan and published by Elsevier. This book was released on 2024-03-01 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials in Biomass Conversion: Advances and Applications for Bioenergy, Biofuels and Bio-based Products critically reviews the basic principles through to the latest advances in the emerging field of nanotechnology for the production of biofuels and bioenergy. Divided into 3 parts, the first five chapters explain the fundamentals of nanomaterials, their properties, characterization, and basic processes for synthesis. Part 2, which constitutes the majority of the book, reviews the various methods and technologies for the conversion of biomass to bioenergy, biofuels, and value-added products using nanomaterials. This includes homogeneous and heterogeneous nano-catalytic systems, nano-photocatalytic conversion, nanomaterial-assisted anaerobic digestion, nanoparticles-immobilized enzymes conversion, the production of biogas, volatile fatty acids, and value-added products, and in carbon capture and conversion to sustainable energy products, as well as the potential of nano-biochar, nano-cellulose, and other nanomaterials in microbial fuel cells, bioelectrochemical systems, and batteries. Finally, Part 3 addresses the techno-economics and financial viability in the context of the circular economy, risk related to toxicology, stability, and environmental impacts, and considers the various challenges and future opportunities of biomass conversion through nanomaterials. Nanomaterials in Biomass Conversion is an invaluable resource for researchers and engineers involved in the production of bioenergy, biofuel, and bioproducts, and will also be of benefit to those interested in environmental remediation, pollution management, and cleaner energy production. Critically examines the role of nanomaterials in the management of waste biomass as applied to bioenergy and biofuels Explains various nanotechnological methods for the conversion of waste biomass into value-added products Discusses the basic principles, operational aspects, ongoing developments, and future perspectives related to the applications of nanotechnologies and nanomaterials in biomass conversion Provides solutions to the key challenges of nanotechnologies and nanomaterials in the conversion of biomass, along with future challenges and risks
Download or read book Biofuels written by Ram Sarup Singh and published by CRC Press. This book was released on 2016-11-10 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This will be a comprehensive multi-contributed reference work, with the Editors being highly regarded alternative fuels experts from India and Switzerland. There will be a strong orientation toward production of biofuels covering such topics as biodiesel from renewable sources, biofuels from biomass, vegetable based feedstocks from biofuel production, global demand for biofuels and economic aspects of biofuel production. Book covers the latest advances in all product areas relative to biofuels. Discusses coverage of public opinion related to biofuels. Chapters will be authored by world class researchers and practitioners in various aspects of biofuels. Provides good comprehensive coverage of biofuels for algae. Presents extensive discussion of future prospects in biofuels.
Download or read book Transition Metal Carbides Nitrides and Borides and Their Oxygen Containing Analogs Useful as Water Gas Shift Catalysts written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mono- and bimetallic transition metal carbides, nitrides and borides, and their oxygen containing analogs (e.g. oxycarbides) for use as water gas shift catalysts are described. In a preferred embodiment, the catalysts have the general formula of M1.sub. A M2.sub. B Z.sub. C O.sub. D, wherein M1 is selected from the group consisting of Mo, W, and combinations thereof; M2 is selected from the group consisting of Fe, Ni, Cu, Co, and combinations thereof; Z is selected from the group consisting of carbon, nitrogen, boron, and combinations thereof; A is an integer; B is 0 or an integer greater than 0; C is an integer; O is oxygen; and D is 0 or an integer greater than 0. The catalysts exhibit good reactivity, stability, and sulfur tolerance, as compared to conventional water shift gas catalysts. These catalysts hold promise for use in conjunction with proton exchange membrane fuel cell powered systems.
