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16 results on '"Yuan, Xiaoxian"'

5. Recent Advances in Zeolites‐Catalyzed Biomass Conversion to Hydroxymethylfurfural: The Role of Porosity and Acidity.

Author

Wang, Yanan, Yuan, Xiaoxian, Liu, Jianxin, and Jia, Xicheng

Subjects
*BIOMASS conversion, *HYDROXYMETHYLFURFURAL, *ACIDITY, *POROSITY, *SUSTAINABLE development, *FEEDSTOCK, *LEWIS acidity
Abstract

Biomass is an attractive raw material for the production of fuel oil and chemical intermediates due to its abundant reserves, low price, easy biodegradability, and renewable use. Hydroxymethylfurfural (5‐HMF) is a valuable platform chemically derived from biomass that has gained significant research interest owing to its economic and environmental benefits. In this review, recent advances in biomass catalytic conversion systems for 5‐HMF production were examined with a focus on the catalysts selection and feedstocks' impact on the 5‐HMF selectivity and yield. Specifically, the potential of zeolite‐based catalysts for efficient biomass catalysis was evaluated given their unique pore structure and tunable (Lewis and Brønsted) acidity. The benefits of hierarchical modifications and the interactions between porosity and acidity in zeolites, which are critical factors for the development of green catalytic systems to convert biomass to 5‐HMF efficiently, were summarized and assessed. This Review suggests that zeolite‐based catalysts hold significant promise in facilitating the sustainable utilization of biomass resources. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Bismuth single atom supported CeO2nanosheets for oxidation resistant photothermal reverse water gas shift reactionElectronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2cy00771a

Author

Kang, Xiaoxiao, Yuan, Dachao, Yi, Zhiqi, Yu, Chenyang, Yuan, Xiaoxian, Liang, Baolai, San, Xingyuan, Gao, Linjie, Wang, Shufang, and Li, Yaguang

Abstract

Photothermal reverse water gas shift reaction (RWGS) is one of the most essential green technologies for CO2utilization. However, the intermittent photothermal RWGS makes all catalysts inactive due to air oxidation. Therefore, investigating new catalysts with high activity and oxidation resistance simultaneously is imperative for the industrialization of photothermal RWGS, which has not yet been realized. Here, Bi single atoms supported by CeO2nanosheets are synthesized viathe soft template method, which showed high activity and stability for RWGS under air corrosion at 400 °C, revealing unprecedented oxidation resistance. Experiments and first principles calculation confirm that the Bi single atoms kept their +3 valence state during RWGS and have a low energy barrier for RWGS, thus leading to high activity and oxidation resistance for RWGS. When loading BiOx/CeO2in a Ti2O3based photothermal system, a CO generation rate of 31.00 mmol g−1h−1was achieved under 3 sun units of irradiation, 4 times higher than the state of the art of solar driven RWGS under 20 sun units of irradiation. Moreover, there is still no inactivation of BiOx/CeO2in intermittent air oxidation, which can directly promote the industrialization of photothermal RWGS.

Published
2022
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