物理化学学报Issue(12)：2315-2322,8.DOI:10.3866/PKU.WHXB201410152
Pd-Cu/γ-Al2O3催化苯乙炔选择性加氢反应
Selective Hydrogenation of Phenylacetylene over Pd-Cu/γ-Al2O3 Catalysts
摘要
Abstract
A two-step method combining col oid synthesis and incipient wetness impregnation was developed for the preparation of bimetal ic Pd-Cu/γ-Al2O3 catalysts, with the aim of increasing the selectivity to styrene in the selective hydrogenation of phenylacetylene. The structural properties of the catalysts were characterized using high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), CO-pulse chemisorption, N2 physisorption, and inductively coupled plasma atomic emission spectrometry (ICP-AES). The effects of changing the Cu/Pd molar ratio, the Pd loading, and the order in which the Pd and Cu were introduced into the catalysts on the catalytic activity and selectivity were investigated. The results showed that Pd-Cu/γ-Al2O3 exhibited much higher selectivity toward styrene than Pd/γ-Al2O3. In particular, Pd-Cu/γ-Al2O3 with a Pd loading of 0.3%(w) and a Cu/Pd molar ratio of 0.6 displayed excel ent performance at 40 °C under 0.1 MPa H2, with a high selectivity of 95%at a conversion of 90%, and a selectivity of approximately 82%, even at conversions of higher than 99%. The increased selectivity of Pd-Cu/γ-Al2O3 was ascribed mainly to the geometrical effects of the Pd-Cu bimetal ic al oys, rather than the electronic effects, since no electron transfer occurred between Pd and Cu.关键词
Pd-Cu/γ-Al2O3/选择性加氢/苯乙炔/苯乙烯/结构-性能关系Key words
Pd-Cu/γ-Al2O3/Selective hydrogenation/Phenylacetylene/Styrene/Structure-performance relationship分类
化学化工引用本文复制引用
王沾祺,周志明,张锐,李莉,程振民..Pd-Cu/γ-Al2O3催化苯乙炔选择性加氢反应[J].物理化学学报,2014,(12):2315-2322,8.基金项目
The project was supported by the Program for New Century Excellent Talents in University, China (NCET-13-0801) and Fundamental Research Funds for the Central Universities, China (222201313011).教育部新世纪优秀人才支持计划(NCET-13-0801)和中央高校基本科研业务费(222201313011)资助 （NCET-13-0801）
