Hydrogen production by the water-gas shift reaction using CuNi/Fe2O3 catalyst

2015 ◽  
Vol 5 (5) ◽  
pp. 2752-2760 ◽  
Author(s):  
Ajay Jha ◽  
Dae-Woon Jeong ◽  
Jae-Oh Shim ◽  
Won-Jun Jang ◽  
Yeol-Lim Lee ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Water Gas Shift ◽  
Crystalline Lattice ◽  
Water Gas Shift Reaction ◽  
High Temperature Water ◽  
Wgs Reaction ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction.

scholarly journals Improved Catalytic Activity of the High-Temperature Water Gas Shift Reaction on Metal-Exsolved La0.9Ni0.05Fe0.95O3 by Controlling Reduction Time

2021 ◽  
Vol 5 (2) ◽  
pp. 28
Author(s):  
Rui Huang ◽  
Jeong Woo Han
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Perovskite Oxide ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Reduction Time ◽  
High Temperature Water ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

The catalyst exsolved from nickel-doped perovskite oxide, La0.9Ni0.05Fe0.95O3, has been proven to be effective for gas-phase reactions. To obtain the optimum amount of exsolved nanoparticles from the parent perovskite oxide, control of the reduction treatment condition is vital. Here, the effect of reduction time on the exsolved nanoparticle distribution, and thus the catalytic activity of the high-temperature water gas shift reaction (WGSR), was investigated. Upon conducting a wide range of characterizations, we assumed that the exsolution process might be a two-step process. Firstly, the surface oxygen is extracted. Secondly, due to the unstable perovskite structure, the Ni ions in the bulk La0.9Ni0.05Fe0.95O3 continuously diffuse toward the surface and, as the reduction progresses, more nuclei are generated to form a greater number of nanoparticles. This assumption is proven by the fact that, with an increase in the exsolution treatment time, the population of exsolution nanoparticles increases. Moreover, as the reduction time increases, the high-temperature WGSR activity also increases. The temperature-programmed measurements suggest that the exsolved nanoparticles are the active reaction sites. We believe that this study is helpful for understanding exsolution behavior during reduction treatment and, thus, developing a perovskite exsolution catalyst for the WGSR.

Roles of highly ordered mesopore structures of Fe-Ni bimetal oxide for an enhanced high temperature water-gas shift reaction activity

2021 ◽  
Author(s):  
Yong Min Park ◽  
Jae Min Cho ◽  
Gui Young Han ◽  
Jong Wook Bae
Keyword(s):  
High Temperature ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Hard Template ◽  
High Temperature Water ◽  
Wgs Reaction ◽  
Ordered Mesoporous ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

Highly ordered mesoporous Fe-Ni bimetal oxides (m-FeNi) prepared by a nanocasting method using a hard template of KIT-6 were investigated for an alternative high temperature water-gas shift (HT-WGS) reaction. As-synthesized...

Optimization of Cobalt Loading in Co–CeO2 Catalyst for the High Temperature Water–Gas Shift Reaction

2017 ◽  
Vol 60 (9-11) ◽  
pp. 721-726 ◽  
Author(s):  
Yeol-Lim Lee ◽  
Ajay Jha ◽  
Won-Jun Jang ◽  
Jae-Oh Shim ◽  
Kyung-Won Jeon ◽  
...  
Keyword(s):  
High Temperature ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
High Temperature Water ◽  
Cobalt Loading ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

Mesoporous NiCu–CeO2 oxide catalysts for high-temperature water–gas shift reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1430-1437 ◽  
Author(s):  
Ajay Jha ◽  
Dae-Woon Jeong ◽  
Won-Jun Jang ◽  
Chandrashekhar V. Rode ◽  
Hyun-Seog Roh
Keyword(s):  
High Temperature ◽  
Self Assembly ◽  
Oxide Catalysts ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Assembly Method ◽  
High Temperature Water ◽  
Shift Reaction ◽  
Water Gas ◽  
Temperature Water

Mesoporous NiCu–CeO2 oxide catalysts were synthesized by using the evaporation-induced self-assembly method applied to the high-temperature, water–gas shift reaction (HT-WGS) between 350 to 550 °C.

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