Zr and Fe on Pt/ CeO 2 ‐MO x / Al 2 O 3 catalysts for WGS reaction

2021 ◽  
Author(s):  
Miriam González‐Castaño ◽  
Svetlana Ivanova ◽  
Miguel Angel Centeno ◽  
Theophiles Ioanides ◽  
Harvey Arellano‐García ◽  
...  
Keyword(s):  
Wgs Reaction

scholarly journals Carbon Monoxide Induced Metabolic Shift in the Carboxydotrophic Parageobacillus thermoglucosidasius DSM 6285

2021 ◽  
Vol 9 (5) ◽  
pp. 1090
Author(s):  
Habibu Aliyu ◽  
Ronnie Kastner ◽  
Pieter de Maayer ◽  
Anke Neumann
Keyword(s):  
Carbon Monoxide ◽  
Alternative Energy ◽  
Redox Balance ◽  
Biotechnological Potential ◽  
Alternative Pathways ◽  
Biological Water ◽  
Wgs Reaction ◽  
Water Gas ◽  
Further Development ◽  
Parageobacillus Thermoglucosidasius

Parageobacillus thermoglucosidasius is known to catalyse the biological water gas shift (WGS) reaction, a pathway that serves as a source of alternative energy and carbon to a wide variety of bacteria. Despite increasing interest in this bacterium due to its ability to produce biological hydrogen through carbon monoxide (CO) oxidation, there are no data on the effect of toxic CO gas on its physiology. Due to its general requirement of O2, the organism is often grown aerobically to generate biomass. Here, we show that carbon monoxide (CO) induces metabolic changes linked to distortion of redox balance, evidenced by increased accumulation of organic acids such as acetate and lactate. This suggests that P. thermoglucosidasius survives by expressing several alternative pathways, including conversion of pyruvate to lactate, which balances reducing equivalents (oxidation of NADH to NAD+), and acetyl-CoA to acetate, which directly generates energy, while CO is binding terminal oxidases. The data also revealed clearly that P. thermoglucosidasius gained energy and grew during the WGS reaction. Combined, the data provide critical information essential for further development of the biotechnological potential of P. thermoglucosidasius.

scholarly journals Highly active Cu-ZnO catalysts for the WGS reaction at medium–high space velocities: Effect of the support composition

2017 ◽  
Vol 42 (16) ◽  
pp. 10747-10751 ◽  
Author(s):  
C. Price ◽  
L. Pastor-Pérez ◽  
E. le Saché ◽  
A. Sepúlveda-Escribano ◽  
T.R. Reina
Keyword(s):  
Highly Active ◽  
Wgs Reaction ◽  
High Space ◽  
Effect Of The Support

Facet-dependent activity of shape-controlled TiO2 supported Au nanoparticles for water-gas shift reaction†

2022 ◽  
Author(s):  
Yuanting Tang ◽  
Yongjie Chen ◽  
Xiao Liu ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Oxide Interface ◽  
Wgs Reaction ◽  
Dependent Activity ◽  
Shape Controlled ◽  
Shift Reaction ◽  
Water Gas

The bifunctional role of noble metal/oxide interface in the activation of reactants is of vital importance in heterogeneous catalysis of water-gas shift (WGS) reaction. Herein, three types of shape-controlled TiO2...

scholarly journals Cr-Free, Cu Promoted Fe Oxide-Based Catalysts for High-Temperature Water-Gas Shift (HT-WGS) Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 305
Author(s):  
Sagar Sourav ◽  
Israel E. Wachs
Keyword(s):  
Active Sites ◽  
Catalyst Surface ◽  
Analysis Data ◽  
Fe Oxide ◽  
Redox Sites ◽  
Wgs Reaction ◽  
Catalytic Active Sites ◽  
Redox Ability ◽  
Water Gas ◽  
Temperature Water

Ca, Ni, Co, and Ge promoters were examined as potential candidates to substitute for the current toxic Cr in Cu-promoted Fe oxide-based catalysts for the HT-WGS reaction. The Ca and Ni promoters were found to improve catalyst performance relative to promotion with Cr. The HS-LEIS surface analysis data demonstrate that Ca and Ge tend to segregate on the surface, while Ni, Co, and Cr form solid solutions in the Fe3O4 bulk lattice. The corresponding number of catalytic active sites, redox, and WGS activity values of the catalysts were determined with CO-TPR, CO+H2O-TPSR, and SS-WGS studies, respectively. The poorer HT-WGS performances of the Ge and Co promoters are related to the presence of surface Ge and Co that inhibits catalyst redox ability, with the Co also not stabilizing the surface area of the Fe3O4 support. The Ni promoter uniformly disperses the Cu nanoparticles on the catalyst surface and increases the number of FeOx-Cu interfacial redox sites. The Ca promoter on the catalyst surface, however, enhances the activity of the FeOx-Cu interfacial redox sites. The CO+H2O TPSR results reveal that the redox ability of the active sites follows the SS-WGS performance of the catalysts and show the following trend: 3Cu8CaFe > 3Cu8NiFe ≥ 3Cu8CrFe > 3Cu8CoFe >> 3Cu8GeFe. Furthermore, all the catalysts followed a redox-type reaction mechanism for the HT-WGS reaction.

Outdoor sunlight-driven scalable water-gas shift reaction through novel photothermal device-supported CuOx/ZnO/Al2O3 nanosheets with a hydrogen generation rate of 192 mmol g−1 h−1

2020 ◽  
Vol 8 (37) ◽  
pp. 19467-19472
Author(s):  
Chengcheng Shi ◽  
Dachao Yuan ◽  
Luping Ma ◽  
Yaguang Li ◽  
Yangfan Lu ◽  
...  
Keyword(s):  
Production Rate ◽  
Light Absorption ◽  
Hydrogen Generation ◽  
Water Gas Shift ◽  
Generation Rate ◽  
Water Gas Shift Reaction ◽  
Wgs Reaction ◽  
Shift Reaction ◽  
Water Gas

A new photothermal device is constructed by the Cr based selective light absorption film which can heat the 2D CuZnAl to 297 °C under 1 standard sun irradiation, leading to a 192 mmol g−1 h−1 of H2 production rate from 1 sun irradiated WGS reaction.

WGS reaction empirical kinetics over novel potassium promoted ZnAlLa mixed oxides catalyst

2020 ◽  
Vol 164 ◽  
pp. 293-298
Author(s):  
Katarzyna Antoniak-Jurak ◽  
Paweł Kowalik ◽  
Kamila Michalska ◽  
Ewelina Franczyk ◽  
Anna Mrozek
Keyword(s):  
Mixed Oxides ◽  
Wgs Reaction

Introduction About WGS Reaction

2015 ◽  
pp. 1-20 ◽  
Author(s):  
Gunugunuri K. Reddy ◽  
Panagiotis G. Smirniotis
Keyword(s):  
Wgs Reaction

Ultra High Temperature WGS Reaction

2015 ◽  
pp. 127-136
Author(s):  
Gunugunuri K. Reddy ◽  
Panagiotis G. Smirniotis
Keyword(s):  
High Temperature ◽  
Wgs Reaction ◽  
Ultra High Temperature
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