Preparation of chlorine-free CuY catalysts by vapour impregnation and their application for oxidative carbonylation

被引：0

作者：

Wang Y. ^{[1
]}

Liu Z. ^{[1
]}

Tan C. ^{[2
]}

Sun H. ^{[1
]}

Li Z. ^{[3
]}

机构：

[1] Department of Applied Chemistry, Yuncheng University, Yuncheng

[2] Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin

[3] Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 01期

关键词：

CuY catalyst; Dimethyl carbonate; Oxidative carbonylation of methanol; Preparation; Vapour impregnation;

D O I：

10.16085/j.issn.1000-6613.2020-0510

中图分类号：

学科分类号：

摘要：

CuY catalysts were prepared by vapour impregnation with copper acetylacetonate as the copper source and NH4Y zeolite as the support. The performance of the catalysts was evaluated by using direct vapor-phase oxidative carbonylation of methanol to dimethyl carbonate (DMC) as a model reaction. The surface dispersion, active component content, acid strength and concentration of the as-prepared catalysts were characterized by X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR) and NH3-temperature programmed desorption (NH3-TPD), respectively. It was found that copper species were highly dispersed on the Y zeolite and the crystal structure of the Y zeolite remained intact. For the CuY/250 catalyst activated at 250℃ and in the atmosphere of N2: H2=12: 1, the active component content was the highest and the catalytic activity was excellent. The obtained methanol conversion, space time yield and selectivity of dimethyl carbonate were 11.1%, 200.5mg/(g•h) and 60.3% respectively. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：242 / 246

页数：4

共 25 条

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