Effect of Configuration Addition of Precursors on Structure and Catalysis of Cu/SiO2 Catalysts Prepared by Ammonia Evaporation-Hydrothermal Method

被引：23

作者：

Chen, Zheng ^{[1
,2
]}

Zhang, Juan ^{[1
]}

Abbas, Mohamed ^{[1
,3
]}

Xue, Yingying ^{[1
,2
]}

Sun, Jiaqiang ^{[1
]}

Liu, Kefeng ^{[4
]}

Chen, Jiangang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Natl Res Ctr, Ceram Dept, El Bohouth St, Cairo 12622, Egypt

[4] PetroChina Petrochem Res Inst, Beijing 100195, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2017年 / 56卷 / 33期

基金：

中国国家自然科学基金;

关键词：

HYDROGENOLYSIS; EFFICIENT; ETHANOL; CU; HYDROGENATION; NANOPARTICLES; PERFORMANCE; REDUCTION; ACETATE; SURFACE;

D O I：

10.1021/acs.iecr.7b02034

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The effect of a precursors configuration addition on the texture, composition, morphology, and catalytic performance of Cu/SiO2 catalysts, prepared by the ammonia evaporation-hydrothermal method (AEH), was investigated. Different configuration additions of the precursor have significant impacts on the chrysocolla (Cu2Si2O5(OH)(2)) content, which determines the metal copper specific surface area due to the differing copper particle size and reducibility. The Lewis acid and basic sites of the reduced catalyst surface are linearly dependent on the copper specific surface area. In gas-phase hydrogenation of ethyl acetate to ethanol, the Lewis basic and acid sites have a synergistic effect on ethanol selectivity. The proper configuration addition of the precursors gave rise to the highest ethanol selectivity of 96% at reaction conditions of P = 2.40 MPa, T = 553 K, H-2/AcOEt (molar ratio) = 40, liquid hourly space velocity (LHSV) = 1 h(-1), and AcOEt/H2O/EtOH (mass ratio) = 90/6/4.

引用

页码：9285 / 9292

页数：8

共 24 条

[1] Ester hydrogenolysis over promoted Cu/SiO2 catalysts [J].