Citation: GU Chuan-tao, LI Guang-jun, HU Yun-qing, QING Shao-jun, HOU Xiao-ning, GAO Zhi-xian. Effect of calcination temperature of starch-modified silica on the performance of silica supported Cu catalyst in methanol conversion[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(11): 1328-1335. shu

Effect of calcination temperature of starch-modified silica on the performance of silica supported Cu catalyst in methanol conversion

1.
1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: GAO Zhi-xian,
Received Date: 8 February 2012
Available Online: 16 April 2012
Fund Project: 煤转化国家重点实验室开放基金(11-12-308)。 (11-12-308)

A series of starch-modified SiO₂ (SSi-T) were obtained by calcining the extrudate of SiO₂ and starch at different temperatures (T) and used as the support to prepare Cu catalysts (Cu/SSi-T, 10%) by the impregnation method. The Cu catalysts were characterized by N₂ sorption, FT-IR, TG, XRD, SEM and H₂-TPR; their catalytic performance in methanol conversion was investigated in a fixed bed reactor. The results indicated that starch can reduce the removal rate of silanol groups (Si-OH) from the surface of the support during calcination and the surface silanol groups are beneficial to the dispersion of Cu species. The calcination temperature of starch-modified SiO₂ exhibits a significant influence on the surface silanol (Si-OH) concentration, the surface area and porous structure of the support; as a result, it may be used to adjust the size of supported CuO crystal grains and dispersion of Cu species, which determine the performance of the silica supported Cu catalysts in methanol conversion.
- silica,
- starch-modification,
- Cu-based catalyst,
- calcination temperature,
- methanol conversion,
- methyl formate
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