Catalytic activity of rare earth and alkali metal promoted (Ce, La, Mg, K) Ni/Al2O3 nanocatalysts in reverse water gas shift reaction

2019 ◽  
Vol 45 (10) ◽  
pp. 5125-5141 ◽  
Author(s):  
Atieh Ranjbar ◽  
Abdullah Irankhah ◽  
Seyed Foad Aghamiri
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Alkali Metal ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Reverse Water Gas Shift ◽  
Shift Reaction ◽  
Water Gas

scholarly journals Effect of Pd and Ir as Promoters in the Activity of Ni/CeZrO2 Catalyst for the Reverse Water-Gas Shift Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1076
Author(s):  
Lucy Idowu Ajakaiye Jensen ◽  
Sara Blomberg ◽  
Christian Hulteberg
Keyword(s):  
Catalytic Activity ◽  
Water Gas Shift ◽  
Intermediate Step ◽  
Co2 Conversion ◽  
Water Gas Shift Reaction ◽  
Co2 Utilization ◽  
Reverse Water Gas Shift ◽  
Rwgs Reaction ◽  
Shift Reaction ◽  
Water Gas

Catalytic conversion of CO2 to CO using reverse water gas shift (RWGS) reaction is a key intermediate step for many CO2 utilization processes. RWGS followed by well-known synthesis gas conversion may emerge as a potential approach to convert CO2 to valuable chemicals and fuels. Nickel (Ni) based catalysts with ceria-zirconia (Ce-Zr) support can be used to tune the metal-support interactions, resulting in a potentially enhanced CO2 hydrogenation rate and elongation of the catalyst lifespan. The thermodynamics of RWGS reaction is favored at high temperature for CO2 conversion. In this paper the effect of Palladium (Pd) and Iridium (Ir) as promoters in the activity of 10 wt%Ni 2 wt%Pd 0.1wt%Ir/CeZrO2 catalyst for the reverse water gas shift reaction was investigated. RWGS was studied for different feed (CO2:H2) ratios. The new active interface between Ni, Pd and Ir particles is proposed to be an important factor in enhancing catalytic activity. 10 wt%Ni 2 wt%Pd 0.1 wt%Ir/CeZrO2 catalyst showed a better activity with CO2 conversion of 52.4% and a CO selectivity of 98% for H2:CO2 (1:1) compared to the activity of 10%Ni/CeZrO2 with CO2 conversion of 49.9% and a CO selectivity of 93%. The catalytic activity for different feed ratios using 10 wt%Ni 2 wt%Pd 0.1 wt%Ir/CeZrO2 were also studied. The use of palladium and iridium boosts the stability and life span of the Ni-based catalysts. This indicates that the catalyst could be used potentially to design RWGS reactors for CO2 utilization units.

The effects of rare earth oxides on the reverse water-gas shift reaction on palladium/alumina

1994 ◽  
Vol 28 (2-4) ◽  
pp. 313-319 ◽  
Author(s):  
D. J. Pettigrew ◽  
D. L. Trimm ◽  
N. W. Cant
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxides ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Reverse Water Gas Shift ◽  
Shift Reaction ◽  
Water Gas

Essential role of oxygen vacancies of Cu-Al and Co-Al spinel oxides in their catalytic activity for the reverse water gas shift reaction

2020 ◽  
Vol 266 ◽  
pp. 118669 ◽  
Author(s):  
Ali M. Bahmanpour ◽  
Florent Héroguel ◽  
Murat Kılıç ◽  
Christophe J. Baranowski ◽  
Pascal Schouwink ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancies ◽  
Essential Role ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Reverse Water Gas Shift ◽  
Spinel Oxides ◽  
Shift Reaction ◽  
Water Gas

Boosting reverse water-gas shift reaction activity of Pt nanoparticles through light doping of W

2021 ◽  
Author(s):  
Daiya Kobayashi ◽  
Hirokazu Kobayashi ◽  
Kohei Kusada ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Water Gas Shift ◽  
Solid Solution Alloy ◽  
Alloy Nanoparticles ◽  
Water Gas Shift Reaction ◽  
Reverse Water Gas Shift ◽  
Rwgs Reaction ◽  
Shift Reaction ◽  
Water Gas ◽  
First Time

We report PtW solid-solution alloy nanoparticles (NPs) as a reverse water-gas shift (RWGS) reaction catalyst for the first time. Atomic-level alloying of Pt and W significantly enhanced the RWGS reaction activity of Pt NPs.

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