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369 results on '"Yue, Yinghong"'

13. Cu/MgO as an Efficient New Catalyst for the Non-Oxidative Dehydrogenation of Ethanol into Acetaldehyde.

Author

Tian, Chao, Yue, Yinghong, Miao, Changxi, Hua, Weiming, and Gao, Zi

Subjects
*COPPER catalysts, *CATALYST supports, *COPPER, *X-ray diffraction, *DEHYDROGENATION, *ACETALDEHYDE
Abstract

The non-oxidative dehydrogenation of ethanol into acetaldehyde is one of the efficient solutions for biomass upgrading. In this work, a series of copper catalysts supported on MgO with different Cu loadings ranging from 2.5% to 20% were prepared by an impregnation method. The as-synthesized Cu/MgO catalysts were characterized by N2 adsorption, XRD, TEM, CO2-TPD, XPS and TPR. These catalysts were found to be effective for ethanol dehydrogenation into acetaldehyde. As the Cu loading was increased, the ethanol conversion first increased and then leveled off. At a WHSV of 1.5 h−1 and 250 °C, the 20%Cu/MgO catalyst gave an initial conversion of 81.5%, with 97.7% selectivity toward acetaldehyde. Compared to 20%Cu/SiO2, the 20%Cu/MgO catalyst displayed an equivalent initial acetaldehyde yield, higher acetaldehyde selectivity and longer stability. [ABSTRACT FROM AUTHOR]

Published
2024
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50. Direct and Highly Selective Conversion of Bioethanol to Propylene Over Y-CeO2 and Zeolite Beta Composite.

Author

Jin, Huan, Yue, Yinghong, Miao, Changxi, Tian, Chao, Hua, Weiming, and Gao, Zi

Subjects
*ETHANOL, *PROPENE, *ETHANOL as fuel, *ZEOLITES, *ZEOLITE catalysts, *ISOPROPYL alcohol
Abstract

A series of Y-CeO2/Beta composites with different Beta contents were prepared by an incipient impregnation method, followed by calcination at 650 °C. The Y-CeO2/Beta composites display excellent catalytic performance in the conversion of ethanol to propylene. In particular, the Y-CeO2/10%Beta catalyst with 10% zeolite Beta affords the highest propylene yield of 64.1%. The probe reactions suggest that the role of zeolite Beta in the Y-CeO2/Beta composite catalyst is to promote conversion of the acetone intermediate generated on Y-CeO2 oxide to 2-propanol via the MPV reaction as well as the subsequent dehydration of resulting 2-propanol to propylene, thereby enhancing the selective conversion of ethanol to propylene dramatically. [ABSTRACT FROM AUTHOR]

Published
2023
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