文献类型：期刊文献

英文题名：Al2O3 microrods supported Pd catalysts for semi-hydrogenation of acetylene: Acidic properties tuned reaction kinetics behaviors

作者：Yang, Zhirong[1];Li, Yurou[1];Cao, Yueqiang[1];Zhao, Xingqiang[1];Chen, Wenyao[1];Zhang, Jing[1];Qian, Gang[1];Peng, Chong[2];Gong, Xueqing[3];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Dalian Res Inst Petr & Petrochemicals, Dalina, Liaoning, Peoples R China;[3]East China Univ Sci & Technol, Ctr Computat Chem & Res Inst Ind Catalysis, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：445

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20221912095349);WOS:【SCI-EXPANDED(收录号:WOS:000894022000004)】；

基金：This work was financially supported by the Natural Science Foundation of China (21922803, 22122807, 22008067 and 22008072), the Innovation Program of Shanghai Municipal Education Commission, the Program of Shanghai Academic/Technology Research Leader (21XD1421000), the China Postdoctoral Science Foundation (2020M681202, 2021T140204, 2020M671025 and 2019TQ0093).

语种：英文

外文关键词：Acetylene semi-hydrogenation; Pd catalysts; Al2O3 microrods; Acidic properties; Kinetics descriptor

摘要：The acidic properties of the support show remarkable effects on Pd-catalyzed reactions including the semi-hydrogenation of acetylene. Herein, Al2O3 microrods with distinct acidic properties are synthesized as the supports for Pd catalysts to address the acidic properties dominated kinetics behavior of acetylene hydrogenation. The acidic properties of Al2O3 microrods decrease with the calcination temperature, in the order of Al2O3-1400 < Al2O3-1200 < Al2O3-800, in which the numbers denote the temperature for calcination process. Catalytic performance show that the hydrogenation activities of the corresponding Pd catalysts increase by Pd/Al2O3-1400 < Pd/Al2O3-800 < Pd/Al2O3-1200, while the selectivities to the target ethylene decrease by Pd/Al2O3-1400 > Pd/Al2O3-1200 > Pd/Al2O3-800. A quantitative analysis combined with structure characterizations are further performed to elucidate the underlying origin of such acidic-property dependent performances. It is demonstrated that the different electronic structures of Pd caused by the acidic properties contribute to distinct adsorption properties for the reactant and the target products, which can be quantitatively described by the entropy of activation (Delta S*).