Author: Robert Merrill Stanfield
Publisher:
ISBN:
Category :
Languages : en
Pages : 363
Book Description
Characterization of Silica Supported Iron-cobalt Catalysts for Fischer-Tropsch Synthesis
Author: Robert Merrill Stanfield
Publisher:
ISBN:
Category :
Languages : en
Pages : 363
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 363
Book Description
The Preparation, Characterization, and Use of Unsupported Iron-cobalt Catalysts for Fischer-Tropsch Synthesis
Author: William Douglas Kostka
Publisher:
ISBN:
Category :
Languages : en
Pages : 642
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 642
Book Description
Iron and Cobalt Catalysts
Author: Wilson D. Shafer
Publisher: MDPI
ISBN: 303928388X
Category : Science
Languages : en
Pages : 414
Book Description
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.
Publisher: MDPI
ISBN: 303928388X
Category : Science
Languages : en
Pages : 414
Book Description
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.
Characterization of Silica Supported Cobalt Fischer-Tropsch Catalysts by X-ray Absorption Spectroscopy
Author: Benjamin Goundie
Publisher:
ISBN:
Category : Fischer-Tropsch process
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Fischer-Tropsch process
Languages : en
Pages : 0
Book Description
Synthetic Liquid Fuels from Hydrogenation of Carbon Monoxide
Author: William Jefferson Boone
Publisher:
ISBN:
Category : Aluminum oxide
Languages : en
Pages : 850
Book Description
Publisher:
ISBN:
Category : Aluminum oxide
Languages : en
Pages : 850
Book Description
Investigation of Intrinsic Activity of Cobalt and Iron Based Fischer-Tropsch Catalysts Using Transient Kinetic Methods
Author: Alexandre Antônio Bento Carvalho
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
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.
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
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.
Cobalt and Iron Catalysts for the Fischer-Tropsch Synthesis
Characterisation of Silica-supported Cobalt Fischer-Tropsch Catalysts
Author: Paul James Taylor
Publisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 98
Book Description
Publisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 98
Book Description
Fischer-Tropsch Synthesis, Catalysts, and Catalysis
Author: Burtron H. Davis
Publisher: CRC Press
ISBN: 1466555300
Category : Science
Languages : en
Pages : 424
Book Description
This book is based on a symposium held during the 248th American Chemical Society meeting that focused on use of the Fischer-Tropsch process in producing synthetic fuels. Its contents reflect the four dominant subjects of the meeting: catalyst preparation and activation, catalyst activity and reaction mechanisms, catalyst characterization and related reactions, and topics concerning commercializing the Fischer-Tropsch process. It covers recent developments related to renewable resources and green energy and provides a glimpse of the commercial potential of the Fischer-Tropsch process in synthetic fuel production.
Publisher: CRC Press
ISBN: 1466555300
Category : Science
Languages : en
Pages : 424
Book Description
This book is based on a symposium held during the 248th American Chemical Society meeting that focused on use of the Fischer-Tropsch process in producing synthetic fuels. Its contents reflect the four dominant subjects of the meeting: catalyst preparation and activation, catalyst activity and reaction mechanisms, catalyst characterization and related reactions, and topics concerning commercializing the Fischer-Tropsch process. It covers recent developments related to renewable resources and green energy and provides a glimpse of the commercial potential of the Fischer-Tropsch process in synthetic fuel production.