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Showing 1 to 20 of 90 for “"water-gas shift"”.
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Supported metal catalysts for water-gas shift conversion
… the past decade due to increases in greenhouse gases and its impact on global climate change. The use of fuel cells as a form of energy generation is extremely promising as it converts chemical potential energy directly to electrical energy, bypassing the Carnot cycle limitations. Various types …
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Solution combustion catalysts for the water-gas shift reaction
… their improved efficiency and lower greenhouse gas-emissions. This study focuses on the development of a compact, efficient design for fuel processing trains. More specifically, reduction in the size of the largest component, the Water Gas-Shift (WGS) reactor, which could be achieved by an …
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Performance of gold catalysts for low temperature water gas shift
… prepared gold catalysts for low temperature water gas shift (LTS) - and more specifically to investigate the performance of these catalysts at temperatures below those traditionally utilised. As opposed to the research undertaken to-date on gold catalysed water gas shift, the reaction was …
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A screening study of a new water gas shift catalyst
… software techniques have been developed to study water gas shift catalysts over a temperature range of 150°C to 400°C, a pressure range of 0 atmospheres gauge to 30 atmospheres gauge, and a space velocity range of 600 hr⁻¹ to 60,000 hr⁻¹ . The hardware consists of a 5-foot long 3/16 inch-I.D. …
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Catalytic allylation of aldehydes mediated via the water-gas shift reaction
… aldehydes, as mediated through the action of the Water-Gas Shift reaction (WGSR). Through this work, three main objectives were sought. Firstly, an expansion of the scope of the allyl pro-nucleophile as a way to both improve the synthetic utility of the reaction and explore steric and electronic …
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Performance of gold reference catalysts in the water gas shift reaction
Includes bibliographical references (leaves 76-82).
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Kinetic models for the Pt/CeO₂ catalysed water-gas shift reaction
… for power generation due to their low greenhouse gas emissions. For fuel cells to be a successful power source, a reliable hydrogen source is required. Ultimately, the goal is for hydrogen to be supplied from renewable energy technology however, this type of technology is currently not mature …
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Water-gas shift conversion in microchannel reactors using noble metal catalysts
… which converts most of the primary fuel to syngas. In the subsequent water-¬‐gas-¬‐shift stage,most of the carbon monoxide in the syngas is converted to additional hydrogen and carbon dioxide. In a last stage, the small amount of carbon monoxide that remains in the stream is reduced to …
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Analysis of a duo-selecting membrane reactor for the water-gas shift
The water-gas shift reaction is an exothermic and reversible catalytic process that converts carbon monoxide and water (steam) to hydrogen and carbon dioxide. In regard to energy-related issues, the water-gas shift is part of the process of reforming hydrocarbons to produce hydrogen suitable for …
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Structure-activity relationships for the water-gas shift reaction over supported metal catalysts
<p>The Water-Gas Shift (WGS) reaction (CO + H<sub>2</sub>O → CO<sub>2</sub> + H<sub>2</sub>) is an important chemical process for industrial hydrogen production. The overall goal of this project is to use kinetic experiments and <em>in situ</em> characterization techniques in tandem, in order to …
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Atomic Scale Characterisation of Pt-Re/CeO2 for the Water Gas Shift Reaction
Inexpensive hydrogen gas is needed to transition to a hydrogen based economy. For this to happen, economically feasible, large scale production of hydrogen gas is required. Currently, electrolysis is unable to meet this demand economically, so steam reforming of hydrocarbons (e.g. methane) is …
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Preparation and Water-Gas Shift Performance of Zinc Oxide Supported Dispersed Gold Catalysts
The classical deposition-precipitation synthesis from the group of Haruta (Tsubota eta/., 1995) -where the support is added to a pH adjusted solution of HAuCI4 and the system aged at constant pH and temperature - was examined, using ZnO as the support. Gold uptake by the support was confirmed to …
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Preparation and water-gas shift performance of zinc oxide supported dispersed gold catalysts
… supported dispersed gold materials for use as water-gas shift catalysts were examined, with some of the better formulated materials being tested for catalytic activity, and compared to World Gold Council Au/TiO₂ reference material and a commercial copper-based WGS catalyst (Cu/ZnO/AlO₃ - C 18-7 …
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Metal oxide supported iron-nickel nano-alloys in the reverse water-gas shift reaction
… activated to carbon monoxide via the reverse water- gas shift (RWGS) reaction. The RWGS is thermodynamically limited. CO and CO2 methanation are favoured over the RWGS at industrially preferred reaction conditions and there is a need for low temperature catalysts with a high CO selectivity. …
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INFLUENCES OF INTERFACES AND PROMOTERS ON THE WATER-GAS SHIFT REACTION OVER SUPPORTED NOBLE METAL CATALYSTS
The water-gas shift reaction (WGS) is an important reaction to produce high purity
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Atomic Level Study Of Water-Gas Shift Catalysts Via Transmission Electron Microscopy And X-Ray Spectroscopy
<p>Water-gas shift (WGS), CO + H<sub>2</sub> O [Special characters omitted.] CO<sub>2</sub> + H<sub>2</sub> (ΔH° = -41 kJ mol<sup> -1</sup> ), is an industrially important reaction for the production of high purity hydrogen. Commercial Cu/ZnO/Al<sub>2</sub> O<sub>3</sub> catalystsare employed to …
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Kinetics and Reaction Engineering Aspects of Syngas Production by the Heterogeneously Catalysed Reverse Water Gas Shift Reaction
… of a process for CO2 utilisation and/or syngas production, the catalytic hydrogenation of CO2 using commercial Ni/Al12O19 and Al2O3 catalysts was studied. The experiments were performed in a down-flow fixed bed quartz reactor at atmospheric pressure. The reverse water gas shift (RWGS) …
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Structure and activity relationships of bimetallic catalysts for aqueous phase reforming and the water-gas shift reaction
… site time yield (STY) and 8 times higher water-gas shift (WGS) turnover rate (TOR). The bimetallic structure and oxidation state of the catalysts before and after reaction were determined by x-ray absorption spectroscopy (EXAFS and XANES spectra). While the fresh structure varied among the …
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Studies of an alkali impregnated cobalt-molybdate catalyst for the water-gas shift and the methanation reactions
… cobalt0-molybdate on an A1 203 support, for the water-gas shift, methanation, and ethanol dehydration reactions, we can make the following conclusions: 1. The cesium-impregnated "Aldridge" catalyst is highly active for the water-gas shift reaction under sulfur tolerant conditions. 2. The activity …
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