Methanation of Carbon Monoxide and Carbon Dioxide on Titanium Dioxide Supported Catalysts PDF Download
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Author: Mon Wei Lin
Publisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 102
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Author: Mon Wei Lin
Publisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 102
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Author: Andrew C. Lee
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 84
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Author: Andreas Michael Kern
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Carbon monoxide
Languages : en
Pages : 212
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This research is to study the effect of surface modification of TiO2 support on the catalytic activity in CO oxidation. Two methods were employed for surface modification of TiO2 support: the creation of defective sites on TiO2 surface and the modification with trace element. The results found that the presence of higher amount of Ti3+ on the larger crystallite size TiO2 stabilizes small metal particles during impregnation, calcination, and reduction steps via stronger metal-support interaction; hence higher CO oxidation activities. In addition, the modification of TiO2 support with trace element can improve the CO oxidation activity. All of element dopants (i.e., Al, Si and P), the Si-modified TiO2 showed the highest catalytic performance of Ag/TiO2 catalyst. However, there existed an optimum content of Si/Ti molar ratio at ca. 0.05-0.1 which resulted in an improved catalytic activity of Ag/TiO2 in CO oxidation. There was no improvement in CO oxidation activity of the Ag/TiO2 catalyst when the Si/Ti was further increased to 0.3 due probably to the formation of amorphous SiO2 instead of the Ti-O-Si bond. The P-modified TiO2 supported Ag catalysts using phosphorus precursor in the form of oxide promoted the weak adsorbed oxygen species and resulted in catalytic activity improvement in CO oxidation.
Author: Theodore Stephen Romanos
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 102
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Author: John Achu Moma
Publisher:
ISBN:
Category : Catalysis
Languages : en
Pages : 460
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Author: Daniel Keehan
Publisher:
ISBN:
Category : Carbon monoxide
Languages : en
Pages : 430
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The utilization of carbon dioxide reforming of methane in a solar based Chemical Energy Transmission System (CETS) relies greatly upon the development of suitable catalysts for both the endothermic and exothermic reactions. Carbon dioxide reforming of methane produces hydrogen and carbon monoxide at a ratio of about one, thus requiring the methanation reaction on the other side of the closed loop CETS to utilize this feed. H2/CO ratios lower than three favor the formation of carbon with industrial methanation catalysts. Preliminary tests performed on methanation with rhodium and nickel catalysts produced two, 0.5% Rh/A12O3 and Ni/A12O3, for further study. Kinetic experiments were conducted in an isothermal continuous stirred tank reactor constructed of a copper alloy which prevented carbon formation on reactor parts. These experiments were performed on pelleted 0.5% Rh/A12O3 in the 400 to 500 C range and pelleted 70% Ni/A12O3 in the 300 to 500 C temperature range. In most experiments steam was added to the reactor feed to inhibit carbon formation. Keywords: Catalytic methanation, Methanation kinetics, Carbon monoxide, Hydrogen, Rhodium, Nickel, Theses. (MJM).
Author: Kent Coulter
Publisher:
ISBN:
Category : Metal catalysts
Languages : en
Pages : 390
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Author: Abd El-Fatah Abomohra
Publisher: BoD – Books on Demand
ISBN: 1839626682
Category : Science
Languages : en
Pages : 190
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Book Description
Anaerobic digestion (AD) is by far the most important technology for providing clean renewable energy to millions in rural areas of many developing countries. AD of biowastes produces both biomethane and anaerobic digestate as a byproduct that can be used further as a biofertilizer. Biowastes including sewage, food processing wastes, animal wastes, and lignocellulosic wastes typically produce biogas containing 55%–70% biomethane. In the context of energy consumption, more than 85% of the total energy consumed currently comes from non-renewable fossil resources. Biogas technology can provide sustainable, affordable, and eco-friendly energy through waste recycling. This book provides basic knowledge and recent research on biogas production, focusing on the enhancement of biomethane and production routes integrated with microalgae cultivation or agriculture.
Author: R. T. K. Baker
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 258
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