期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 13, 页码 8238-8246出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.12.163
关键词
Acetylene hydration; Cu-based catalysts; Copper complexes; Ionic liquid; Synergistic effect
资金
- Applied Basic Research Program of Bingtuan [2015AG001]
- Double First-Class Project
- High-level Talent Scientific Research Project of Shihezi University [SHYL-YB201906, RCZX201405]
In this study, a high-performance and long-lived catalyst with activated carbon supported copper-ionic liquid system was prepared for the hydration of acetylene. The findings demonstrate that embedding copper species in ionic liquid ensures high and stable dispersion of active species, leading to excellent catalytic performance.
At present, heterogeneous mercury-free catalysts are suffering from rapid deactivation caused by reduction or aggregation/growth of copper particle during preparation and reaction. Here, a high-performance and long-lived catalysts with activated carbon supported copper-ionic liquid system (Cu-xIL/AC, x is the molar ratio of IL and Cu) was prepared by wet impregnation method for the hydration of acetylene to acetaldehyde. Over the optimal Cu-1.5IL/AC catalyst, the acetylene conversion of 96.8% and acetaldehyde selectivity of 87.1% could still be obtained at 20 h (T = 240 degrees C, CHSVC2H2 = 90 h(-1) and V-H2O/V-C2H2( )= 1.15). The experimental results indicated that Cu species were embedded in ionic liquid (IL) and the interaction and synergistic effect between metal ions and IL guaranteed high and stable dispersion of active species on the host and suppress the reduction of active Cu specie, which are mainly responsible for the excellent catalytic property. The findings highlight the contribution of ILs in heterogeneous catalytic reaction and supply a promising industrial application of Cu-1.5IL/AC catalyst in acetylene hydration. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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