The bifunctional oxygen carrier K/LayCoxFe1-xO3 for the production of C2–C4 olefins via CO2 hydrogenation

Sun, Xiunan; Guo, Tuo; An, Mei; Guo, Xintong; Han, Ziheng; Zhai, Dongyuan; Ma, Jingjing; Hu, Xiude; Zhang, Jianli; He, Yuqing; Guo, Qingjie

doi:10.1016/j.ijhydene.2023.06.217

Cited by 4 publications

(1 citation statement)

References 70 publications

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“…X-ray photoelectron spectroscopy (XPS) was employed to elucidate surface oxygen and chemical states of the 10FCZ- y DFMs. In the O 1s XPS analysis spectra (Figure a), three distinct peaks are observed: lattice oxygen (O L ) at 529.6 eV, oxygen vacancies (O V ) at 531.5 eV, and chemically adsorbed oxygen species (O C ) at 532.6 eV. , The introduction of ZrO 2 resulted in a shift of the lattice oxygen peak toward lower binding energy (BE), indicating the interaction of ZrO 2 with the material. Oxygen vacancies, particularly O 2– species, played a crucial role in CO 2 adsorption, and their abundance is observed in fresh DFMs.…”

Section: Resultsmentioning

confidence: 99%

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Gao,

Yuan,

Yang

et al. 2024

ACS Sustainable Chem. Eng.

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The urgent need to address global warming has led researchers to investigate various methods for capturing and utilizing CO 2 . One promising approach is the integration of calcium looping (CaL) and reverse water−gas shift (RWGS) reactions. Therefore, dual functional materials enriched with CaZrO 3 were introduced as effective catalysts, exhibiting a sustainable catalytic CO 2 conversion to 100% CO selectivity and a remarkable CO 2 adsorption capacity (16.69 mmol g DFM −1 ), CO yield (9.64 mmol g DFM −1), even under low hydrogen concentration (15% H 2 ) in CaL and RWGS processes. Surface chemistry analysis revealed that oxygen vacancies, acting adsorption sites, and lattice oxygen of CaZrO 3 can be activated by hydrogen. This activation, linked to the formation of strong basic sites with Zr 4+ -O 2− , significantly enhanced CO 2 conversion efficiency. The synergistic promotion mechanism was validated through in situ X-ray diffraction, DRIFTS, and Raman spectroscopy techniques. The bidentate formate mechanism was predominant, indicating that bicarbonates and hydroxyl synergistic promote CO 2 conversion in the high-temperature CaL−RWGS process. 10FCZ−5 showed good long-time stability, and the material maintained a high dispersion of Fe species after 10 cycles, demonstrating excellent absorbent capacity (11 mmol g DFM −1) and CO yield (6.2 mmol g DFM −1 ).

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Section: Resultsmentioning

confidence: 99%

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Gao,

Yuan,

Yang

et al. 2024

ACS Sustainable Chem. Eng.

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Effects of surface groups on Fe/ZnO catalysts for CO2 hydrogenation to olefin

Wang,

Gao,

Zhang

et al. 2024

Applied Surface Science

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Utilizing metal oxide enhancement for efficient CO2 capture and conversion in calcium-based dual-function materials

Gao,

Li,

Yuan

et al. 2024

Journal of the Energy Institute

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The bifunctional oxygen carrier K/LayCoxFe1-xO3 for the production of C2–C4 olefins via CO2 hydrogenation

Cited by 4 publications

References 70 publications

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

Effects of surface groups on Fe/ZnO catalysts for CO2 hydrogenation to olefin

Utilizing metal oxide enhancement for efficient CO2 capture and conversion in calcium-based dual-function materials

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The bifunctional oxygen carrier K/LayCoxFe1-xO3 for the production of C2–C4 olefins via CO2 hydrogenation

Cited by 4 publications

References 70 publications

In Situ Capture and Conversion of CO2 to CO Using CaZrO3 Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO2 to CO Using CaZrO3 Promoted Fe–CaO Dual-Functional Material

Effects of surface groups on Fe/ZnO catalysts for CO2 hydrogenation to olefin

Utilizing metal oxide enhancement for efficient CO2 capture and conversion in calcium-based dual-function materials

Contact Info

Product

Resources

About

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material

In Situ Capture and Conversion of CO₂ to CO Using CaZrO₃ Promoted Fe–CaO Dual-Functional Material