Influence of the Precursor Phase Transition on the Catalyst Activity in Slurry Methanol Synthesis

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (11): 2215.

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Influence of the Precursor Phase Transition on the Catalyst Activity in Slurry Methanol Synthesis

LI Zhong*, GUO Qi-Hai, ZHANG Xiao-Bing, ZHENG Hua-Yan, FAN Hui, XIE Ke-Chang

Institude of Coal Chemical Engineering, Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

Received:2009-03-21 Online:2009-11-10 Published:2009-11-10
Contact: LI Zhong. E-mail: lizhong@tyut.edu.cn
Supported by:
国家“九七三”计划(批准号: 2005CB221204)资助.

Abstract

Abstract:

The CuO/ZnO/Al₂O₃ catalyst precursor were prepared by co-current precipitation and the crystal composition and phase-transition of the precursor prepared at different aging temperature were investigated in order to study the effect of the crystal composition and phase-transition of the precursor on the catalyst activity for slurry methanol synthesis. The results show that phase-transition of precursors are prominent influence on catalytic activity for slurry methanol synthesis. The (Cu,Zn)₂CO₃(OH)₂ and(Cu,Zn)₅(CO₃)₂(OH)₆ crystal phase are critical precursor to produce the catalytic active centre. The degree of substitution between Cu²⁺ and Zn²⁺ is increased with increasing Cu²⁺/Zn²⁺ entering crystal lattices of Zn₅(CO₃)₂(OH)₆/Cu₂(CO₃)(OH)₂, and the ratio of copper to zinc in Rosasite and Aurichalcite is unchangeable. The calcined catalyst has more specific surface area and strong interaction between CuO-ZnO, and gets high activity in slurry methanol synthesis.

Key words: CuO/ZnO/Al₂O₃ catalyst; Precursor; Phase-transition; Slurry reactor; Methanol synthesis

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LI Zhong*, GUO Qi-Hai, ZHANG Xiao-Bing, ZHENG Hua-Yan, FAN Hui, XIE Ke-Chang. Influence of the Precursor Phase Transition on the Catalyst Activity in Slurry Methanol Synthesis[J]. Chem. J. Chinese Universities, 2009, 30(11): 2215.

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Influence of the Precursor Phase Transition on the Catalyst Activity in Slurry Methanol Synthesis

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