Efficient Water–Gas Shift Catalysts for H2O and CO Dissociation Using Cu–Ni Step Alloy Surfaces

2021 ◽  
Author(s):  
Sudipta Roy ◽  
Ashwani K. Tiwari
Keyword(s):  
Water Gas Shift ◽  
Co Dissociation ◽  
Water Gas

Catalytic Reactivity of CuNi Alloys toward H2O and CO Dissociation for an Efficient Water–Gas Shift: A DFT Study

2011 ◽  
Vol 116 (1) ◽  
pp. 745-752 ◽  
Author(s):  
Li-Yong Gan ◽  
Ren-Yu Tian ◽  
Xiao-Bao Yang ◽  
Hong-Duo Lu ◽  
Yu-Jun Zhao
Keyword(s):  
Water Gas Shift ◽  
Dft Study ◽  
Co Dissociation ◽  
Catalytic Reactivity ◽  
Water Gas

Methanation of Carbon Monoxide with Water over Supported Rhodium Catalysts.

1985 ◽  
Vol 38 (2) ◽  
pp. 293 ◽  
Author(s):  
Y Tanaka ◽  
T Iizuka
Keyword(s):  
Carbon Monoxide ◽  
Low Temperature ◽  
High Activity ◽  
Water Gas Shift ◽  
Rhodium Catalysts ◽  
Water Gas Shift Reaction ◽  
Carbonaceous Species ◽  
Co Dissociation ◽  
Shift Reaction ◽  
Water Gas

The formation of methane in the reaction of CO and H2O over Rh supported on ZrO2, Al2O3, TiO2, SiO2 and MgO was examined. The high activity was achieved over Rh/ZrO2 and Rh/TiO2 at 300°C and CO dissociation ability of the catalyst was concluded to be an important factor to obtain high activity. At low temperature (c. 200°C), CO was not hydrogenated effectively but CO2 formed by the water gas shift reaction was hydrogenated after the conversion of CO into CO2 was completed. The formation of CH4 appears to occur through the water gas shift reaction, followed by the hydrogenation of carbonaceous species formed by the dissociation of CO or CO2.

New approaches for Mars in-situ resource utilization based on the reverse water gas shift

1997 ◽  
Author(s):  
Robert Zubrin ◽  
Mitchell Clapp ◽  
Tom Meyer ◽  
Robert Zubrin ◽  
Mitchell Clapp ◽  
...  
Keyword(s):  
Resource Utilization ◽  
Water Gas Shift ◽  
New Approaches ◽  
Reverse Water Gas Shift ◽  
Water Gas

Water Gas May Not Shift in Deep Earth

2020 ◽  
Author(s):  
Nore Stolte ◽  
Junting Yu ◽  
Zixin Chen ◽  
Dimitri A. Sverjensky ◽  
Ding Pan
Keyword(s):  
Formic Acid ◽  
Upper Mantle ◽  
Free Energy Calculations ◽  
Water Gas Shift ◽  
Ab Initio Molecular Dynamics ◽  
Water Gas Shift Reaction ◽  
Carbon Carrier ◽  
Deep Earth ◽  
Shift Reaction ◽  
Water Gas

The water-gas shift reaction is a key reaction in Fischer-Tropsch-type synthesis, which is widely believed to generate hydrocarbons in the deep carbon cycle, but is little known at extreme pressure-temperature conditions found in Earth’s upper mantle. Here, we performed extensive ab initio molecular dynamics simulations and free energy calculations to study the water-gas shift reaction. We found the direct formation of formic acid out of CO and supercritical water at 10∼13 GPa and 1400 K without any catalyst. Contrary to the common assumption that formic acid or formate is an intermediate product, we found that HCOOH is thermodynamically more stable than the products of the water-gas shift reaction above 3 GPa and at 1000∼1400 K. Our study suggests that the water-gas shift reaction may not happen in Earth’s upper mantle, and formic acid or formate may be an important carbon carrier, participating in many geochemical processes in deep Earth.<br>

Li2ZrO3 Nanoparticles as Absorbent for in-Situ Removal of CO2 in Water-Gas Shift Reaction to Enhance H2 Production

2013 ◽  
Vol 33 (9) ◽  
pp. 1572-1577 ◽  
Author(s):  
Yuanzhuo ZHANG ◽  
Ziying YU ◽  
Fumin ZHANG ◽  
Qiang XIAO ◽  
Yijun ZHONG ◽  
...  
Keyword(s):  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Shift Reaction ◽  
Water Gas
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