scholarly journals Versatile Ni-Ru catalysts for gas phase CO2 conversion: Bringing closer dry reforming, reverse water gas shift and methanation to enable end-products flexibility

Fuel ◽  
2022 ◽  
Vol 315 ◽  
pp. 123097
Author(s):  
Loukia-Pantzechroula Merkouri ◽  
Estelle le Saché ◽  
Laura Pastor-Pérez ◽  
Melis S. Duyar ◽  
Tomas Ramirez Reina
Keyword(s):  
Gas Phase ◽  
Dry Reforming ◽  
Water Gas Shift ◽  
Co2 Conversion ◽  
Ru Catalysts ◽  
Reverse Water Gas Shift ◽  
End Products ◽  
Water Gas

scholarly journals Fast oxygen ion migration in Cu–In–oxide bulk and its utilization for effective CO2 conversion at lower temperature

2021 ◽  
Author(s):  
Jun-Ichiro Makiura ◽  
Takuma Higo ◽  
Yutaro Kurosawa ◽  
Kota Murakami ◽  
Shuhei Ogo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Water Gas Shift ◽  
Chemical Looping ◽  
Co2 Conversion ◽  
Ion Migration ◽  
Oxygen Ion ◽  
Reverse Water Gas Shift ◽  
Oxygen Ion Migration ◽  
Lower Temperature ◽  
Water Gas

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.

scholarly journals Dry Reforming of Methane over CNT-Supported CeZrO2, Ni and Ni-CeZrO2 Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 741
Author(s):  
Agata Łamacz ◽  
Paulina Jagódka ◽  
Michalina Stawowy ◽  
Krzysztof Matus
Keyword(s):  
Dry Reforming ◽  
Water Gas Shift ◽  
Dry Reforming Of Methane ◽  
Water Gas Shift Reaction ◽  
Catalyst Composition ◽  
Co2 Consumption ◽  
Reverse Water Gas Shift ◽  
Shift Reaction ◽  
Water Gas ◽  
First Time

In this work, the carbon nanotubes (CNT)-supported nanosized, well-dispersed, CeZrO2 and Ni-CeZrO2 catalysts were obtained and tested for the first time in the reaction of methane dry reforming (DRM). The performance of the hybrid materials was compared with the performance of Ni/CNT catalyst. The mechanism of the DRM reaction and the occurrence of reverse water gas shift reaction (RWGS) and CO2 deoxidation were discussed in terms of catalysts composition. The contribution of RWGS and CO2 deoxidation in the DRM process, demonstrating an increased CO2 consumption when compared to CH4, and H2/CO < 1, varied depending on the catalyst composition, was also studied.

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.

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

2019 ◽  
Vol 129 ◽  
pp. 105724 ◽  
Author(s):  
Bowen Lu ◽  
Fengjiao Quan ◽  
Zheng Sun ◽  
Falong Jia ◽  
Lizhi Zhang
Keyword(s):  
Water Gas Shift ◽  
High Yield ◽  
Co2 Conversion ◽  
Reverse Water Gas Shift ◽  
Water Gas

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

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1082 ◽  
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.

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

Crystals ◽  
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.

Ni/Ce–Zr–O catalyst for high CO2 conversion during reverse water gas shift reaction (RWGS)

2015 ◽  
Vol 40 (46) ◽  
pp. 15985-15993 ◽  
Author(s):  
Feng-man Sun ◽  
Chang-feng Yan ◽  
Zhi-da Wang ◽  
Chang-qing Guo ◽  
Shi-lin Huang
Keyword(s):  
Water Gas Shift ◽  
Co2 Conversion ◽  
Water Gas Shift Reaction ◽  
High Co2 ◽  
Reverse Water Gas Shift ◽  
Shift Reaction ◽  
Water Gas
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