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Showing 1 to 20 of 21 for “"Reverse water gas shift"”.
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Metal oxide supported iron-nickel nano-alloys in the reverse water-gas shift reaction
… is first 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 …
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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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Carbon Dioxide Gas Separation from Syngas to Increase Conversion of Reverse Water Gas Shift Reaction via Polymeric and Mixed Matrix Membranes
… efficient separation strategy for effluent gases in the Reverse Water Gas Shift (RWGS) reaction to increase the overall conversion of CO2 to CO. This process involves a separation and recycling process to reuse the unreacted CO2 from the RWGS reactor. The carbon monoxide produced from this …
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Technical, economic, and environmental assessment of liquid jet fuel production on aircraft carriers
… pathways: Alkaline electrolysis and the reverse water gas shift (AE+RWGS), solid oxide electrolysis and RWGS (SOEC+RWGS), and co-electrolysis of steam and CO₂. They are evaluated within two scenarios: a small infrequently operating plant leveraging excess nuclear power (Scenario A) and a …
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New catalysts for syngas production from carbon dioxide and methane
… reactions was considered: methane reforming, reverse water gas shift, carbon deposition and reverse boudouard. Carbon deposition and carbon removal are generally disregarded in most of the reported kinetic-models. The parameters of the model were successfully estimated. The comparison plots of …
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CO2 reduction over noble metal/carbon nanotube catalyst
… (DR) of methane (CH_4 + CO_2 -> 2CO + 2H_2) and reverse water gas shift (RWGS) (H2 + CO_2 -> CO + H_2O). Reaction temperatures range from 773 to 973 K, with system pressure at 30 psig. The feed molar ratios CH4/CO_2 and CO_2/H_2 are varied from 0.5 to 2.0. Reactant conversions in DR and RWGS are …
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Characterization of Anodic Fuel Cell Catalysts Utilizing Various Surface Sensitive Techniques
… experiment in the HUPD region, indicating a reverse water-gas shift. Finally, we attempted to identify the poison species from formic acid oxidation on palladium. The experiments revealed that palladium is not significantly poisoned by carbon-containing species during formic acid oxidation.
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Carbon capture from gas-fired power plant and integration with energy storage and CO2 utilisation
The new and existing gas fired power plant requires urgent and stronger implementation of carbon capture integration to reduce CO2 emission. In this study, an integrated carbon capture system produced through calcium looping (CaL) process is proposed to reduce carbon dioxide emissions, integrating …
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Studies on Hydrogen Selective Silica Membranes and the Catalytic Reforming of CH₄ with CO₂ in a Membrane Reactor
In this work the synthesis, characterization, and gas transport properties of hydrogen selective silica membranes were studied along with the catalytic reforming of CH₄ with CO₂ (CH₄ + CO z 2 CO + 2 H₂) in a hydrogen separation membrane reactor. The silica membranes were prepared by chemical vapor …
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Simultaneous production of methanol and dimethylether from synthesis gas
Dimethylether is a non-toxic liquefied gas, which is projected to become one of the fundamental chemical feedstock in the future. Dimethylether can be produced from syngas via a two-step (indirect) process that involves synthesis of methanol by hydrogenation of CO/CO2 over a copper based catalyst …
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Catalytic Reforming of Biogas for Syngas Production
Biogas is a mixture of methane and carbon dioxide produced from the anaerobic microbial digestion of biomass. It is an inexpensive, local source of energy but is usually wasted because the CO₂ content dilutes the quality of the fuel. Dry and auto-thermal reforming are catalytic methods that convert …
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Kinetic study of dry reforming of Methane with Ni over different supports and Pt/Al2O3
… the reaction system complexity, which means that reverse water gas shift reaction could be dominant in the Ni/ZrO2 reaction system, it is difficult to apply the similar models of DRM for Ni/ZrO2. As for Pt/Al2O3, in this study, it appears to be not active enough to have reliable data for the …
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Co-electrolysis of simulated coke oven gas using solid oxide electrolysis cell technology
… research investigates utilisation of coke oven gas (COG) and its impurities (H2S and phenol) in the means of co-electrolysis using a commercially available anode supported solid oxide cell (SOC). SOCs are highly efficient electrochemical energy conversion devices that can potentially reduce …
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Carbon Supported Metal Carbide Catalysts for the Reduction of Carbon Dioxide
… preventing their exposure to air or passivation gases. The petcoke-based carbon prepared had higher surface areas and pore volumes (~2000 m2/g and > 1 cm3/g) than other commercial carbons (1000-700 m2/g and ~0.5 cm3/g) which enhanced the catalytic performance towards CO2 reduction. …
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Utilisation of biomass-derived gaseous fuels using solid-oxide fuel cells
… devices that can potentially reduce greenhouse gas emissions and revolutionize our energy infrastructures. This research investigates and demonstrates novel and highly efficient methods of utilising renewable biomass-derived gases using SOFC technology with commercially available anode (ASC) and …
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Application of Molybdenum Carbide Catalysts for the CO2-assisted Oxidative Dehydrogenation of Ethane
… could be significantly lowered due to the reverse Boudouard reaction. The most common catalytic materials reported are reducible metal oxides (MOx) due to their redox properties; a key concept to activate the C-H bond of the alkane and subsequently activate CO2. Besides metal oxides, …
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CO2 capture and utilization using dual-functional catalysts
… to provide energy for low-temperature biomass gasification. Firstly, we study the formation of a CaCO3 product layer on the outside surface of CaO grains during the fast reaction stage for carbon capture using two types of CaO adsorbents. The carbonation at 400 ˚C filled the small pores in the …
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Dry reforming of associated natural gas using catalytic membrane reactors.
The mitigation and utilization of greenhouse gases, such as carbon dioxide (CO2), are among the most important challenges in the area of energy research. Dry reforming of propane (C3H8) (DRP), which uses both CO2 and C3H8 as reactants, is a potential method to utilize the previously-mentioned gases …
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Novel empowered supports for iron-based Fischer-Tropsch in a power-to-liquids process
… the past, FT synthesis has been used to produce gasoline and diesel from coal and natural gas. However, with increasing demand for renewable and sustainable energy sources, there has been renewed interest in using FT to produce clean fuels 2 . The FT synthesis process takes place in the presence …
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Supported Cobalt Oxide Catalysts for the Preferential Oxidation of Carbon Monoxide: An in situ Investigation
… catalysts for producing CO-free H2-rich gas streams for power generation using proton-exchange or polymer electrolyte membrane fuel cells (PEMFCs). The removal of CO (0.5 – 2%) is essential as it negatively affects the performance of the Pt-based anode catalyst of PEMFCs. Among the …
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