Download or read book MOSSBAUER SPECTROSCOPY STUDIES OF IRON CATALYSTS USED IN SLURRY PHASE FISCHER TROPSCH SYNTHESIS written by and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Iron and cobalt are the two principal choices as catalysts for Fischer-Tropsch (F-T) synthesis. As discussed in a recent review by Wender each metal has certain advantages and disadvantages. Davis and co-workers have recently discussed the advantages of iron-based F-T catalysts in some detail. In order to understand the catalytic reaction mechanisms of iron during F-T synthesis, it is critical to identify the active catalytic phases. Moreover, from a practical point of view, it is equally important to identify the reactions and transformations that deactivate the catalysts. 57Fe Moessbauer spectroscopy is perhaps the best technique available for quantitative characterization of the iron phases in complex samples. For the past several years, our group has been using Moessbauer spectroscopy to characterize the iron-based catalysts prepared and tested for F-T synthesis in a number of DOE-sponsored programs. The results of this investigation have been summarized in detail in DOE reports and in a number of publications released over the past few years. A list of the principal publications resulting from this work is given. A brief summary of the highlights of the results presented in these papers is presented in the current report.
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report April June 1994 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Moessbauer spectroscopy investigations were carried out on 16 iron-based catalysts during the period under review. A set of 10 samples subjected to different pretreatments and Fischer-Tropsch synthesis were investigated to understand the effect of reduction in different gas atmospheres on the iron phases formed. Another set of 5 catalysts pretreated in CO and subjected to Fischer-Tropsch synthesis using two kinds of wax viz., (a) a low molecular wt. wax and (b) heavy wax were also studied. Although it is difficult to draw any definite conclusions from the data, some plausible trends are noticed: (1) pretreatment of a catalyst in H[sub 2] leads to the formation of[var-epsilon]-carbide; (2) pretreatment of a catalyst in H[sub 2]/CO leads to the formation of[chi]-carbide; (3) reduction of UCI-1185-149-2ND catalyst in CO leads to the formation of[chi]-carbide; and (4) reduction of DOE catalysts in CO leads to the formation of[var-epsilon]-carbide. Data are presented on the phases found in the various catalysts.
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report July September 1994 written by and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Moessbauer spectroscopy investigations were carried out on 7 iron-based catalysts during the period under review. A set of four samples subjected to activation in syn gas and Fischer-Tropsch synthesis were sent by R.J. Gormley, to understand the behavior of the low alpha catalyst used in these runs. Another three used catalyst samples extracted from the LaPorte Run II were sent By Dr. Bharat Bhatt to understand the phase distribution and any correlation with the run results. The high alpha UCI catalyst used in the LaPorte Run I was studied to compare with the UCI low alpha catalyst used in LaPorte Run II. All together 10 Moessbauer measurements both at room and low temperatures were carried out to identify the iron phases present in these catalyst samples. Results to date are presented and some plausible trends are outlined.
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report July September 1996 written by and published by . This book was released on 1997 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mossbauer spectroscopy investigations were carried out on 30 iron based Fischer-Tropsch catalysts. Results are described.
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Process Quarterly Technical Progress Report April 1 1995 June 30 1995 written by and published by . This book was released on 1996 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopic investigations were carried out on 10 iron-based catalysts of Fischer-Tropsch synthesis this quarter. Results are described.
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report January March 1995 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report January March 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 Moessbauer Spectroscopy Studies of Iron catalysts Used in Fischer Tropsch FT Processes Quarterly Technical Progress Report October December 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 Fischer Tropsch Technology written by André Steynberg and published by Elsevier. This book was released on 2004-10-30 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fischer-Tropsch Technology is a unique book for its state-of-the-art approach to Fischer Tropsch (FT) technology. This book provides an explanation of the basic principles and terminology that are required to understand the application of FT technology. It also contains comprehensive references to patents and previous publications. As the first publication to focus on theory and application, it is a contemporary reference source for students studying chemistry and chemical engineering. Researchers and engineers active in the development of FT technology will also find this book an invaluable source of information. * Is the first publication to cover the theory and application for modern Fischer Tropsch technology * Contains comprehensive knowledge on all aspects relevant to the application of Fischer Tropsch technology* No other publication looks at past, present and future applications
Download or read book Fundamentals of Industrial Catalytic Processes written by C. H. Bartholomew and published by John Wiley & Sons. This book was released on 2011-11-30 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysis is central to the chemical industry, as it is directly or involved in the production of almost all useful chemical products. In this book the authors, present the definitive account of industrial catalytic processes. Throughout Fundamentals of Industrial Catalytic Processes the information is illustrated with many case studies and problems. This book is valuable to anyone wanting a clear account of industrial catalytic processes, but is particularly useful to industrial and academic chemists and engineers and graduate working on catalysis. This book also: Covers fundamentals of catalytic processes, including chemistry, catalyst preparation, properties and reaction engineering. Addresses heterogeneous catalytic processes employed by industry. Provides detailed data on existing catalysts and catalytic reactions, process design and chemical engineering. Covers catalysts used in fuel cells.
Download or read book Iron and Cobalt Catalysts written by Wilson D. Shafer and published by MDPI. This book was released on 2020-06-23 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the turn of the last century when the field of catalysis was born, iron and cobalt have been key players in numerous catalysis processes. These metals, due to their ability to activate CO and CH, haev a major economic impact worldwide. Several industrial processes and synthetic routes use these metals: biomass-to-liquids (BTL), coal-to-liquids (CTL), natural gas-to-liquids (GTL), water-gas-shift, alcohol synthesis, alcohol steam reforming, polymerization processes, cross-coupling reactions, and photocatalyst activated reactions. A vast number of materials are produced from these processes, including oil, lubricants, waxes, diesel and jet fuels, hydrogen (e.g., fuel cell applications), gasoline, rubbers, plastics, alcohols, pharmaceuticals, agrochemicals, feed-stock chemicals, and other alternative materials. However, given the true complexities of the variables involved in these processes, many key mechanistic issues are still not fully defined or understood. This Special Issue of Catalysis will be a collaborative effort to combine current catalysis research on these metals from experimental and theoretical perspectives on both heterogeneous and homogeneous catalysts. We welcome contributions from the catalysis community on catalyst characterization, kinetics, reaction mechanism, reactor development, theoretical modeling, and surface science.
Download or read book 12th International Congress on Catalysis written by A. Corma and published by Elsevier. This book was released on 2000-07-05 with total page 2051 pages. Available in PDF, EPUB and Kindle. Book excerpt: The twelfth Congress on Catalysis was held in Granada (Spain) under the auspices of the International Association of Catalysis Societies and the Spanish Society of Catalysis. These four-volume Proceedings are the expression of the Scientific Sessions which constituted the main body of the Congress.They include 5 plenary lectures, 1 award lecture, 8 keynote lectures, 124 oral presentations and 495 posters. The oral and poster contributions have been selected on the basis of the reports of at least two international reviewers, according to standards comparable to those used for specialised journals.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Clean Use of Coal written by DIANE Publishing Company and published by DIANE Publishing. This book was released on 1995-10 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: 4 articles: removing the hazards from coal's hazardous air pollutants; some facts about global climate change; power systems and the environmental challenges; and update on NOx control technologies. Illustrations.
Download or read book Natural Gas Conversion V written by A. Parmaliana and published by Elsevier. This book was released on 1998-09-17 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: On January 1988, the ascertained and economically accessible reserves of Natural Gas (NG) amounted to over 144,000 billion cubic meters worldwide, corresponding to 124 billion tons of oil equivalents (comparable with the liquid oil reserves, which are estimated to be 138 billion TOE). It is hypothesized that the volume of NG reserve will continue to grow at the same rate of the last decade. Forecasts on production indicate a potential increase from about 2,000 billion cubic meters in 1990 to not more than 3,300 billion cubic meters in 2010, even in a high economic development scenario. NG consumption represents only one half of oil: 1.9 billion TOE/y as compared to 3.5 of oil. Consequently, in the future gas will exceed oil as a carbon atom source. In the future the potential for getting energetic vectors or petrochemicals from NG will continue to grow. The topics covered in Natural Gas Conversion V reflect the large global R&D effort to look for new and economic ways of NG exploitation. These range from the direct conversion of methane and light paraffins to the indirect conversion through synthesis gas to fuels and chemicals. Particularly underlined and visible are the technologies already commercially viable. These proceedings prove that mature and technologically feasible processes for natural gas conversion are already available and that new and improved catalytic approaches are currently developing, the validity and feasibility of which will soon be documented. This is an exciting area of modern catalysis, which will certainly open novel and rewarding perspectives for the chemical, energy and petrochemical industries.
Download or read book Fischer Tropsch Synthesis written by Burtron H. Davis and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
