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Book Cobalt and Iron Catalysts for the Fischer Tropsch Synthesis

Download or read book Cobalt and Iron Catalysts for the Fischer Tropsch Synthesis written by John F. Shultz and published by . This book was released on 1959 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthetic Liquid Fuels from Hydrogenation of Carbon Monoxide

Download or read book Synthetic Liquid Fuels from Hydrogenation of Carbon Monoxide written by William Jefferson Boone and published by . This book was released on 1958 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Characterization of Silica Supported Iron cobalt Catalysts for Fischer Tropsch Synthesis

Download or read book Characterization of Silica Supported Iron cobalt Catalysts for Fischer Tropsch Synthesis written by Robert Merrill Stanfield and published by . This book was released on 1981 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Iron and Cobalt Catalysts

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.

Book Synthetic Liquid Fuels from Hydrogenation of Carbon Monoxide

Download or read book Synthetic Liquid Fuels from Hydrogenation of Carbon Monoxide written by John Floid Shultz and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Preparation and Characterization of Cobalt Based and Zinc Promoted Catalyst Fro Fisher Tropsch Synthesis

Download or read book Preparation and Characterization of Cobalt Based and Zinc Promoted Catalyst Fro Fisher Tropsch Synthesis written by Nur Hayati Zulkefli and published by . This book was released on 2011 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research is to compare the characterization of SBA-15 and TiO2 supported cobalt catalyst for Fischer-Tropsch synthesis based on effect of cobalt loading. In order to complete this research, the catalyst must be prepared by incipient wetness impregnation method. The catalysts were prepared with different cobalt loading, which are 5%, 10% and 15% and using zinc as a promoter. To characterize these catalysts, different methods were used. First of all, characterization of SBA-15 and TiO2 were compared by using Fourier Transform Infrared Spectroscopy (FTIR). Then the catalysts were tested using Scanning Electron Microscope (SEM). Through this characterization, the surface of catalysts was compared. The surface structure of Co/SBA-15 is more ordered when compared to Co/TiO2 catalyst. This is compared by the SEM image taken. Therefore, Co/TiO2 is also a good catalyst with advantages when compared to Co/SBA-15 catalyst. The conclusion of this research when comparing the characterization of Co/SBA-15 and TiO2 catalysts, is Co/SBA-15 catalyst is a good catalyst when compared to Co/TiO2 catalyst.

Book Preparation of Active Stable Supported Iron Catalysts and Deactivation by Carbon of Cobalt Catalysts for Fischer Tropsch Synthesis

Download or read book Preparation of Active Stable Supported Iron Catalysts and Deactivation by Carbon of Cobalt Catalysts for Fischer Tropsch Synthesis written by Kamyar Keyvanloo and published by . This book was released on 2014 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second half of this dissertation investigates the effects of operating conditions including the partial pressures of CO and H2 and temperature on the deactivation by carbon of 25 wt% Co/ 0.25 wt% Pt/Al2O3 catalyst. It also reports the kinetics of the main FT reaction on this catalyst. As temperature increases, the H2 and CO orders for the main reaction (in the absence of deactivation) become more positive and more negative, respectively. A new mechanism was proposed to account for the inhibition effect of CO at high reaction temperatures, which includes H-assisted dissociation of CO to C* and OH*. Further, twelve samples of the CoPt/Al2O3 catalyst were tested over a period of 800 hours and XCO

Book Effect of Promoters Mn Zn and ZrO2 on the Characterization of SBA 15 Supported Cobalt Catalyst for Fischer tropsch Synthesis

Download or read book Effect of Promoters Mn Zn and ZrO2 on the Characterization of SBA 15 Supported Cobalt Catalyst for Fischer tropsch Synthesis written by Muhammad Suhaimi Man and published by . This book was released on 2012 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fischer-Tropsch synthesis (FTS) is a part of gas-to-liquids (GTL) technology, which produces synthetic liquid hydrocarbons from natural gas. Recently the production of clean fuels and particularly of synthetic diesel by means of the FTS process has aroused renewed interest in both industrial and academic field. This process was shown to be catalyzed by certain transition metals, such as Co which present the highest activity. This research work is about the synthesis of SBA-15 and preparation of catalyst with different promoter Zr, Zn, Mn - Co based supported by SBA-15 by wet impregnation catalysts and characterizes all sampling. All materials were characterized by several physico-chemical techniques such as TGA, SEM and FTIR. The catalytic and characterization results show a great influence of mesoporous support porosity on the structure, reducibility and FTS catalytic behavior of cobalt oxide species supported over these ordered materials. After modification of SBA-15 by Co with different loading, the particles found to be attached closely with each other. The SEM picture shows a large number of SBA-15 particles attaching closely with one another. So this will make catalyst more efficient and effective during FT process. Then, using FTIR, the functional groups will be observed with certain wavelength in the samples such as cobalt oxides, Si-O-Si, Si-CH3, zinc oxide, OH band, Si-C, and others. Besides that, the identification of metal inside SBA-15 was determined by comparing the pure SBA-15 with the incorporated metal on SBA-15. For this research, the characterization of the catalyst by selecting Zn as promoter have quiet similar characterization with noble metal that already investigate.

Book MOSSBAUER SPECTROSCOPY STUDIES OF IRON CATALYSTS USED IN SLURRY PHASE FISCHER TROPSCH SYNTHESIS

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.

Book Investigation of Intrinsic Activity of Cobalt and Iron Based Fischer Tropsch Catalysts Using Transient Kinetic Methods

Download or read book Investigation of Intrinsic Activity of Cobalt and Iron Based Fischer Tropsch Catalysts Using Transient Kinetic Methods written by Alexandre Antônio Bento Carvalho and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work exposed in this manuscript concerns the study of the intrinsic activity and localization of active sites in cobalt and iron based catalysts using a combination of transient kinetic methods such as SSITKA, extended physicochemical characterization and catalytic tests under quasi steady state conditions. Promotion of iron catalysts with metals used for soldering (Bi and Pb) results a remarkable increase in the light olefin production rate with the possibility to conduct Fischer-Tropsch synthesis at very mild reaction conditions (low pressure) and even at atmospheric pressure. Transient kinetic experiments showed facilitation of CO dissociation in the presence of promoters by scavenging O atoms from iron carbide. Cobalt catalyst supported by mordenite zeolite presented higher value of SSITKA rate constant. Localization of cobalt active sites in bifunctional cobalt-zeolite catalysts has a major impact on the reaction rate and in particular on the hydrocarbon selectivity. A proximity between the cobalt active site and Bronsted active sites was found to be a key parameter to obtain higher selectivity and yield of isomerized hydrocarbons. SSITKA combined with catalyst characterization revealed that carbon deposition and cobalt nanoparticle agglomeration were responsible for the deactivation of silica supported cobalt catalysts. Catalyst rejuvenation in hydrogen lessened the amounts of deposited carbon species and partially released the most active sites of carbon monoxide dissociative adsorption and stronger sites of carbon monoxide reversible adsorption.