Photothermal reverse-water-gas-shift over Au/CeO2 with high yield and selectivity in CO2 conversion

Efficient activation of CO2 at low temperature was achieved by reverse water–gas shift via chemical looping (RWGS-CL) by virtue of fast oxygen ion migration in a Cu–In structured oxide, even at lower temperatures.

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Combustion synthesis of copper ceria solid solution for CO2 conversion to CO via reverse water gas shift reaction

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.12.142 ◽

2022 ◽

Author(s):

Parisa Ebrahimi ◽

Anand Kumar ◽

Majeda Khraisheh

Keyword(s):

Solid Solution ◽

Combustion Synthesis ◽

Water Gas Shift ◽

Co2 Conversion ◽

Water Gas Shift Reaction ◽

Reverse Water Gas Shift ◽

Shift Reaction ◽

Water Gas

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Highly-selective CO2 conversion via reverse water gas shift reaction over the 0.5wt% Ru-promoted Cu/ZnO/Al2O3 catalyst

Applied Catalysis A General ◽

10.1016/j.apcata.2019.02.016 ◽

2019 ◽

Vol 575 ◽

pp. 74-86 ◽

Cited By ~ 9

Author(s):

Yichen Zhuang ◽

Robert Currie ◽

Kimberley B. McAuley ◽

David S.A. Simakov

Keyword(s):

Water Gas Shift ◽

Co2 Conversion ◽

Water Gas Shift Reaction ◽

Reverse Water Gas Shift ◽

Shift Reaction ◽

Water Gas ◽

Al2o3 Catalyst

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Suppression of coke formation during reverse water-gas shift reaction for CO2 conversion using highly active Ni/Al2O3-CeO2 catalyst material

Physics Letters A ◽

10.1016/j.physleta.2021.127206 ◽

2021 ◽

Vol 395 ◽

pp. 127206

Author(s):

R.M. Belekar

Keyword(s):

Coke Formation ◽

Water Gas Shift ◽

Co2 Conversion ◽

Water Gas Shift Reaction ◽

Highly Active ◽

Reverse Water Gas Shift ◽

Shift Reaction ◽

Water Gas

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

Catalysts ◽

10.3390/catal11091076 ◽

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.

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Reverse Water Gas Shift by Chemical Looping with Iron-Substituted Hexaaluminate Catalysts

Catalysts ◽

10.3390/catal10091082 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1082 ◽

Cited By ~ 1

Author(s):

Natalie Utsis ◽

Miron V. Landau ◽

Alexander Erenburg ◽

Moti Herskowitz

Keyword(s):

Surface Area ◽

Oxygen Vacancies ◽

Water Gas Shift ◽

Chemical Looping ◽

Direct Connection ◽

Co2 Conversion ◽

Reduction Temperature ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Water Gas

The Fe-substituted Ba-hexaaluminates (BaFeHAl) are active catalysts for reverse water-gas shift (RWGS) reaction conducted in chemical looping mode. Increasing of the degree of substitution of Al3+ for Fe3+ ions in co-precipitated BaHAl from 60% (BaFeHAl) to 100% (BaFe-hexaferrite, BaFeHF), growing its surface area from 5 to 30 m2/g, and promotion with potassium increased the CO capacity in isothermal RWGS-CL runs at 350–450 °C, where the hexaaluminate/hexaferrite structure is stable. Increasing H2-reduction temperature converts BaFeHAl to a thermally stable BaFeHF modification that contains additional Ba-O-Fe bridges in its structure, reinforcing the connection between alternatively stacked spinel blocks. This material displayed the highest CO capacity of 400 µmol/g at isothermal RWGS-CL run conducted at 550 °C due to increased concentration of oxygen vacancies reflected by greater surface Fe2+/Fe3+ ratio detected by XPS. The results demonstrate direct connection between CO capacity measured in RWGS-CL experiments and calculated CO2 conversion.

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Highly Dispersed and Stable Ni/SBA-15 Catalyst for Reverse Water-Gas Shift Reaction

Crystals ◽

10.3390/cryst11070790 ◽

2021 ◽

Vol 11 (7) ◽

pp. 790

Author(s):

Hui Liu ◽

Luhui Wang

Keyword(s):

Water Gas Shift ◽

Impregnation Method ◽

Good Activity ◽

Co2 Conversion ◽

Water Gas Shift Reaction ◽

Reverse Water Gas Shift ◽

Highly Dispersed ◽

Shift Reaction ◽

Sio2 Support ◽

Water Gas

A 1%Ni/SBA-15(P) catalyst was synthesized with a P123-assisted impregnation method, which exhibited high CO2 conversion and stability in the reverse water-gas shift reaction. For the 1%Ni/SBA-15(P) catalyst, TEM and TPR characterizations demonstrated that the highly dispersed NiO particles at about 3 nm strongly interacted with the SiO2 support. During reverse water-gas shift reaction, the 1%Ni/SBA-15(P) catalyst exhibited higher CO2 conversion than the 1%Ni/SBA-15 catalyst prepared by the conventional impregnation method without P123. The CO2 conversion of the 1%Ni/SBA-15(P) catalyst at 700 °C was 33.7%, which was three times that of the 1%Ni/SBA-15 catalyst. Moreover, the former catalyst was stable at 700 °C within 1000 min. The good activity and stability of the 1%Ni/SBA-15(P) catalyst was owing to small Ni particles that strongly interacted with SBA-15.

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