Effect of the Nature of Ni Species on Hydrogenation of 1,4-Butynediol over Ni/SiO2 Catalysts

被引:0
作者
Zhao, Liping [1 ,2 ]
Yu, Xiaosheng [1 ]
Wu, Ruifang [1 ]
Li, Haitao [1 ]
Wang, Changzhen [1 ]
Zhao, Yongxiang [1 ]
机构
[1] Shanxi Univ, Engn Res Ctr, Minist Educ Fine Chem, Taiyuan 030006, Peoples R China
[2] Yuncheng Univ, Dept Appl Chem, Yuncheng 044000, Peoples R China
基金
中国国家自然科学基金;
关键词
silica framework; nature of Ni species; hydrogenation; 1,4-butynediol; SELECTIVE HYDROGENATION; NI/AL2O3; CATALYSTS; CO METHANATION; SUPPORTED NI; FE; 2-BUTYNE-1,4-DIOL; NANOPARTICLES; ACID; 1,4-BUTANEDIOL; PHYLLOSILICATE;
D O I
10.1002/cctc.202400925
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The catalytic performance of liquid-phase hydrogenation of 1,4-butynediol (BYD) to 1,4-butanediol (BDO) was studied on silica-supported Ni catalysts prepared by impregnation, sol-gel, and ammonia evaporation methods, respectively. Due to the formation of nickel phyllosilicate, the Ni species in Ni/SiO2-AE catalyst prepared by ammonia evaporation is difficult to reduce at 450 degrees C, resulting in fewer Ni0 active sites and poor hydrogenation activity. As for the impregnated Ni/SiO2-IM, its nickel particles are prone to aggregate seriously due to their weak interaction with the support which may be not conducive to catalytic hydrogenation. On the contrary, the Ni species introduced by sol-gel method can homogenously embedded in the amorphous silica intersecting network structure with high metal dispersion and well physical confinement effect, which greatly promotes its BYD hydrogenation performance to obtain BDO with super high selectivity.
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页数:8
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