The effect of mixing on Co-precipitation and evolution of microstructure of Cu-ZnO catalyst

被引：26

作者：

Jiang, Xin ^{[1
]}

Qin, Xiangfei ^{[1
]}

Ling, Chen ^{[1
]}

Wang, Zhiyong ^{[1
]}

Lu, Jiangang ^{[2
]}

机构：

[1] Zhejiang Univ, Coll Chem & Biol Engn, Zhejiang Prov Key Lab Adv Chem Engn Manufacture T, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Coll Control Sci & Engn, State Key Lab Ind Control Technol, Hangzhou 310027, Zhejiang, Peoples R China

来源：

AICHE JOURNAL | 2018年 / 64卷 / 07期

基金：

中国国家自然科学基金;

关键词：

co-precipitation; mixing; Cu-Zn distribution; reaction engineering; chemical memory; METHANOL SYNTHESIS; CU/ZNO CATALYSTS; COPPER; PRECURSORS; HYDROXYCARBONATES; DEHYDROGENATION; PERFORMANCE; CHEMISTRY; SYNGAS;

D O I：

10.1002/aic.16168

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The influence of feeding point in conventional stirred tank reactor and flow characteristics in micro-reactor on the microstructure of Cu-ZnO catalyst was studied. Cu-Zn distribution in co-precipitate was characterized by EDS and Zn fraction in zincian malachite was estimated from the 20 1 peak shift in XRD pattern. The theory analysis and experimental results, combining with measurement of segregation index, show that the contact pattern and mixing of reactants in precipitation process determine the uniformity of Cu-Zn distribution in initial co-precipitates at the micro-scale. The uniform Cu-Zn distribution is favorable for the formation of zincian malachite with higher Zn fraction, whereas the uneven distribution could lead to either zincian malachite with lower Zn fraction or aurichalcite-like nonmalachite. These differences in the precursor structure act on subsequent calcination and reduction, as well as their products. Along this path, mixing affects the evolution of the catalyst microstructure by means of Cu-Zn distribution. (c) 2018 American Institute of Chemical Engineers AIChE J, 64: 2647-2654, 2018

引用

页码：2647 / 2654

页数：8

共 50 条

[1] Microstructure, optical and FTIR studies of Ni, Cu co-doped ZnO nanoparticles by co-precipitation method
Ashokkumar, M.
Muthukumaran, S.
OPTICAL MATERIALS, 2014, 37 : 671 - 678
[2] High Efficiency Cu-ZnO Hydrogenation Catalyst: The Tailoring of Cu-ZnO Interface Sites by Molecular Layer Deposition
Zhang, Bin
Chen, Yao
Li, Jianwei
Pippel, Eckhard
Yang, Huimin
Gao, Zhe
Qin, Yong
ACS CATALYSIS, 2015, 5 (09): : 5567 - 5573
[3] Effect of Calcination Conditions on the Performance of Co-precipitation Catalyst
Lin, Kai
Chen, Wensong
Zhang, Yongli
Xu, Junjian
INTERNATIONAL SYMPOSIUM ON MATERIALS APPLICATION AND ENGINEERING (SMAE 2016), 2016, 67
[4] Ni Doped Cu-ZnO Catalyst for Glycerol Hydrogenolysis
Gao Qiang
Xu Bo-Lian
Tong Qing
Fan Yi-Ning
CHINESE JOURNAL OF INORGANIC CHEMISTRY, 2016, 32 (03) : 469 - 474
[5] Combustion synthesis of Cu-ZnO catalyst for methanol production
Yamaguchi, T
Akiyama, T
Yagi, J
JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1999, 63 (03) : 341 - 344
[6] Effect of residual na on Cu-ZnO catalyst in dehydrogenation of 2-butanol
Wang, ZL
Wang, GJ
Zhu, WC
Yang, PP
Ma, HC
Liu, GZ
Qu, YL
Yu, XF
POLISH JOURNAL OF CHEMISTRY, 2004, 78 (06) : 861 - 868
[7] Defect related microstructure, optical and photoluminescence behaviour of Ni, Cu co-doped ZnO nanoparticles by co-precipitation method
Anbuselvan, D.
Muthukumaran, S.
OPTICAL MATERIALS, 2015, 42 : 124 - 131
[8] Rols of ZnO in Cu-ZnO catalyst for dehydrogenation of sec-butanol
Deng, Jun
Liu, Ying
Zhang, Hongsheng
MECHATRONICS ENGINEERING, COMPUTING AND INFORMATION TECHNOLOGY, 2014, 556-562 : 19 - +
[9] Co-precipitation of Cu and Zn in precipitation of struvite
Lu, Xingwen
Huang, Zebiao
Liang, Zhihong
Li, Zhe
Yang, Jiani
Wang, Yujie
Wang, Fei
SCIENCE OF THE TOTAL ENVIRONMENT, 2021, 764
[10] Cu-doped ZnO nanoparticles synthesized by simple co-precipitation route
Rahmati, Ali
Sirgani, Ali Balouch
Molaei, Mehdi
Karimipour, Masoud
EUROPEAN PHYSICAL JOURNAL PLUS, 2014, 129 (11):

← 1 2 3 4 5 →