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Cu-Mn-Si 催化剂在环己醇脱氢和糠醛加氢耦合反应中的研究: 沉淀pH值和焙烧温度的影响
引用本文:郑洪岩,朱玉雷,黄龙,相宏伟,李永旺.Cu-Mn-Si 催化剂在环己醇脱氢和糠醛加氢耦合反应中的研究: 沉淀pH值和焙烧温度的影响[J].燃料化学学报,2008,36(5):631-636.
作者姓名:郑洪岩  朱玉雷  黄龙  相宏伟  李永旺
作者单位:1.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;2.Graduate School of the Chinese Academy of Sciences, Beijing 10039, China
基金项目:中国科学院其他任务基金
摘    要:采用共沉淀法制备了Cu-Mn-Si催化剂,并将其应用于常压气相环己醇脱氢和糠醛加氢耦合反应中,考察了沉淀pH值和焙烧温度对耦合反应的影响。沉淀pH值对糠醛加氢制2 甲基呋喃反应影响不大,但对环己酮的选择性影响较大。pH值在7.5~10.0制备的催化剂具有优良的反应性能。焙烧温度的提高,导致催化剂的比表面积减小,孔径变大,铜的比表面积下降,还原温度提高。在耦合一体化反应中,环己醇脱氢制备环己酮反应受焙烧温度影响不大,但糠醛转化率和2 甲基呋喃选择性随着焙烧温度的提高而减小。

关 键 词:Cu-Mn-Si    环己醇    糠醛    pH值    焙烧温度  
收稿时间:2008-01-23
修稿时间:2008-04-19

Study on Cu-Mn-Si catalysts for the coupling process of cyclohexanol dehydrogenation and furfural hydrogenation:Effect of pH value and calcination temperature
ZHENG Hong-yan,ZHU Yu-lei,HUANG Long,XIANG Hong-wei,LI Yong-wang.Study on Cu-Mn-Si catalysts for the coupling process of cyclohexanol dehydrogenation and furfural hydrogenation:Effect of pH value and calcination temperature[J].Journal of Fuel Chemistry and Technology,2008,36(5):631-636.
Authors:ZHENG Hong-yan  ZHU Yu-lei  HUANG Long  XIANG Hong-wei  LI Yong-wang
Abstract:The coupling process of the cyclohexanol dehydrogenation and the furfural hydrogenation on precipitated Cu-Mn-Si catalysts was carried out at atmospheric pressure in gas phase. The effects of pH value and calcination temperature on the performance of catalysts were studied in detail. There was no observable difference in furfural hydrogenation reaction over the catalysts precipitated at different values of pH. However, pH value had significant influence on the selectivity of cyclohexanone. The catalysts precipitated at the pH values range of 7.5 to 10.0 showed good performance for the coupling process. The increase of calcination temperature decreased the surface area and copper surface area and increased the average pore size, leading to a difficult reduction of the active phase. The calcination temperature had no significant effect on the cyclohexanol dehydrogenation to cyclohexanone, whereas the conversion of furfural and the selectivity of 2 methylfuran declined with the increase of calcination temperature.
Keywords:Cu-Mn-Si
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