Tailoring active lattice oxygen in CeO2-Based oxygen carriers for enhanced chemical looping dry reforming of methane

IF 5.6 2区工程技术 Q2 ENERGY & FUELS

Journal of The Energy Institute Pub Date : 2025-01-23 DOI:10.1016/j.joei.2025.102014

Yanhui Long , Liboting Gao , Na Yang , Ang Cao , Yilin Zhang , Wee-Liat Ong , Xiaodong Li , Xin Tu , Hao Zhang , Jianhua Yan

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Abstract

In this work, we highlight the significance of tailoring lattice oxygen activity through controlled morphologies of CeO₂-based oxygen carriers for achieving enhanced performance in chemical looping dry reforming of methane (CL-DRM). By combining physical-chemical characterizations (Raman and X-ray photoelectron spectroscoy) and density functional theory (DFT) calculations, we demonstrate that the bulk oxygen mobility, surface oxygen reactivity, and methane activation ability strongly depend on the morphology of CeO₂. Notably, Pd/CeO₂-Rod (Pd/CeO₂-R), which has a unique (110) crystal surface, had the highest CH₄ conversion (66 %) and exceptional syngas yields ∼1.7 and 3 times greater than those of Pd/CeO₂-Cube (Pd/CeO₂-C) and Pd/CeO₂-Octahedron (Pd/CeO₂-O), respectively, while maintaining high CO yields during the CO₂ splitting step at 550 °C. These results underscore the feasibility and importance of tailoring the active lattice oxygen in Ce-based oxygen carriers for optimizing chemical looping processes through morphology modulation.

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来源期刊

Journal of The Energy Institute 工程技术-能源与燃料

CiteScore

10.60

自引率

5.30%

发文量

166

审稿时长

16 days

期刊介绍： The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include: Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies Emissions and environmental pollution control; safety and hazards; Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS; Petroleum engineering and fuel quality, including storage and transport Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems Energy storage The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.