文献类型：期刊文献

英文题名：Semihydrogenation of phenylacetylene over nonprecious Ni-based catalysts supported on AlSBA-15

作者：Yang, Lei[1];Yu, Shiyi[1];Peng, Chong[2];Fang, Xiangchen[2];Cheng, Zhenmin[1];Zhou, Zhiming[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]SINOPEC, Fushun Res Inst Petr & Petrochem, Fushun 113001, Peoples R China

年份：2019

卷号：370

起止页码：310

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20190406411090);WOS:【SCI-EXPANDED(收录号:WOS:000460493700030)】；

基金：We gratefully acknowledge financial supports from the National Natural Science Foundation of China (21776088) and the Fundamental Research Funds for the Central Universities (222201718003).

语种：英文

外文关键词：Semihydrogenation; Phenylacetylene; Nonprecious catalyst; Structure-activity/selectivity; Alloy; Geometric and electronic effects

摘要：A series of nonprecious monometallic Ni/AlSBA-15 and bimetallic Ni-M (M = Zn, Ga, Cu, or Fe)/AlSBA-15 catalysts were prepared using a urea precipitation method and applied to the semihydrogenation of phenylacetylene. The catalysts were characterized by various techniques, showing that the Ni particle size of catalyst can be tuned by adjusting the Al content, and NiZn and NiGa supported catalysts exhibited geometric and electronic effects that originated from the bimetallic alloy. Among all the catalysts studied, NiZn3/AlSBA-15, with a turnover frequency of 10.89 s(-1) comparable to that of precious Pd-based catalysts, presented the highest selectivity to styrene (90.3%) at nearly 100% conversion of phenylacetylene in semibatch operation. This catalyst was further evaluated in a continuous fixed-bed reactor for semihydrogenation of a model C-8 aromatic fraction of pyrolysis gasoline (a mixture of phenylacetylene, styrene, ethylbenzene and xylene), which aimed at assessing its practical application of recovering styrene from pyrolysis gasoline. The results showed that at complete conversion of phenylacetylene, the styrene concentration in the product was always kept at a stable level and higher than its initial concentration over 100 h of time on stream, demonstrating high selectivity and good stability of NiZn3/AlSBA-15. Finally, the application of NiZn3/AlSBA-15 was extended to other phenylacetylene derivatives. (C) 2019 Elsevier Inc. All rights reserved.