In situ investigation of the CO2 methanation on carbon/ceria-supported Ni catalysts using modulation-excitation DRIFTS

Gonçalves, Liliana P. L.; Mielby, Jerrik Jørgen; Soares, O.S.G.P.; Sousa, Juliana P. S.; Petrovykh, Dmitri Y.; Lebedev, Oleg I.; Pereira, M. Fernando R.; Kegnæs, Søren; Kolen’ko, Yury V.

doi:10.1016/j.apcatb.2022.121376

Cited by 23 publications

(15 citation statements)

References 46 publications

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“…On the in situ DRIFTS spectra of 2Pt/AOH and 2Pt/AOH200, after appearance of CO, peaks due to formate present at 1587 and 1398 cm −1 . As such, some CO may be hydrogenated into formate 36 . Apart from CO hydrogenation, CO 3 δ− hydrogenation and internal H transfer from O to C in HCO 3 δ− may also forms formate 37 .…”

Section: Resultsmentioning

confidence: 99%

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

et al. 2023

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Herein, we explore how OH groups on Pt/γ-AlOOH and Pt/γ-Al 2 O 3 catalysts affect CO 2 hydrogenation with H 2 at temperatures from 250 C to 400 C. OH groups are abundant on γ-AlOOH, but rare at Pt-(γ-AlOOH) interface which is the most favorable site for CO 2 conversion on Pt/γ-AlOOH. This makes CO 2 hydrogenation on Pt/γ-AlOOH form CO weakly bonding to γ-AlOOH, which prefers to desorption from Pt/γ-AlOOH rather than further conversion, thus enhancing CO production on Pt/γ-AlOOH. Different from Pt/γ-AlOOH, OH groups are abundant at Pt-(γ-Al 2 O 3 ) interface which is the most favorable site for CO 2 conversion on Pt/γ-Al 2 O 3 . This promotes CO 2 hydrogenation on Pt/γ-Al 2 O 3 to form CO strongly bonding to Pt, which prefers to further hydrogenation to CH 4 , and thereby increases CH 4 selectivity on Pt/γ-Al 2 O 3 . Therefore, the OH groups at metal-support interface are crucial factor influencing product distribution, and must be considered seriously when fabricating catalysts.

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Section: Resultsmentioning

confidence: 99%

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

et al. 2023

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“…Ni‐based supported catalysts are widely used for CO 2 methanation since its low cost and high catalytic activity 43,44 . Doped CeO 2 is a promising support for the Ni catalysts owing to its high oxygen vacancies, thermal stability as well as metal‐support interactions, where the oxygen vacancies could promote the CO 2 adsorption and activation 45,46 . Considering the chemical compatibility with the MOCC membrane reactor, the membrane matrix material (SDC) was directly used as the catalyst support in this study.…”

Section: Resultsmentioning

confidence: 99%

Mixed oxygen ionic‐carbonate ionic conductor membrane reactor for coupling CO₂ capture with in situ methanation

et al. 2022

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CO 2 methanation is one of the vital reactions to utilize CO 2 and realize power to gas process. To decrease the CO 2 capture cost and alleviate the hot spots during the strong exothermic methanation reaction, here, we report a coupling of CO 2 capture process with in situ CO 2 methanation process through a ceramic-molten carbonate (MC) dual phase membrane reactor over the Ni-based catalyst. The performance of the membrane reactor was systematically investigated and compared with the traditional fixed-bed reactor. The results show that the performance of the membrane reactor is higher than that of the fixed-bed reactor, since the produced steam through the methanation process can be partially removed through the dual-phase membrane, which promotes the reaction shift to right side. A stability test shows no obvious degradation within 32 h. These results indicate that the membrane reactor is promising for coupling CO 2 capture with in situ methanation process.

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“…Fundamentally understanding the mechanism of heterogeneous catalytic reaction is a pivotal premise for designing efficient catalysts. 113,114 Although much effort has been made to reveal the reaction mechanism of CO 2 methanation by experimental or/and theoretical methods, a consensus has not yet been reached. As shown in Fig.…”

Section: Co2 Methanation Mechanism Over Ceria-based Catalystsmentioning

confidence: 99%

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Xie

Wen

et al. 2023

Green Chem.

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In situ investigation of the CO2 methanation on carbon/ceria-supported Ni catalysts using modulation-excitation DRIFTS

Cited by 23 publications

References 46 publications

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

Mixed oxygen ionic‐carbonate ionic conductor membrane reactor for coupling CO₂ capture with in situ methanation

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

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In situ investigation of the CO2 methanation on carbon/ceria-supported Ni catalysts using modulation-excitation DRIFTS

Cited by 23 publications

References 46 publications

Tuning product selectivity of CO2 hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al2O3 catalysts

Tuning product selectivity of CO2 hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al2O3 catalysts

Mixed oxygen ionic‐carbonate ionic conductor membrane reactor for coupling CO2 capture with in situ methanation

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO2methanation

Contact Info

Product

Resources

About

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

Tuning product selectivity of CO₂ hydrogenation by OH groups on Pt/γ‐AlOOH and Pt/γ‐Al₂O₃ catalysts

Mixed oxygen ionic‐carbonate ionic conductor membrane reactor for coupling CO₂ capture with in situ methanation

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation