| 高活性Cu/SiO2催化剂上甘油氢解制1,2-丙二醇 |
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| 引用本文： | 周维,赵玉军,马新宾. 高活性Cu/SiO2催化剂上甘油氢解制1,2-丙二醇[J]. 化工学报, 2015, 66(8): 2999-3006. DOI: 10.11949/j.issn.0438-1157.20150812 |
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| 作者姓名： | 周维 赵玉军 马新宾 |
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| 作者单位： | 天津大学化工学院, 天津大学化工协同创新中心, 天津 300072 |
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| 基金项目： | 国家自然科学基金项目(21276186)；中石油科技创新基金项目(2012D-5006-0503)；天津科技支撑计划项目(13JCZDJC33000)。 |
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| 摘 要： | 采用蒸氨法制备了不同Cu负载量的Cu/SiO2催化剂,并在连续固定床上催化甘油氢解。通过氮气物理吸附、X射线衍射、透射电镜、氧化亚氮-氢气滴定等手段对催化剂进行了表征。结果表明制备过程中形成的层状硅酸铜使催化剂具有大比表面积、较高的铜分散度以及较强的金属载体相互作用,因而在甘油氢解反应中表现出较好的时空收率和稳定性。此外,研究发现水对催化剂稳定性具有负面作用,而低转化率的情况下催化剂表面冗余的甘油可能是导致催化活性降低的一个重要因素。
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| 关 键 词： | 甘油 氢解 1 2-丙二醇 层状硅酸铜 失活 生物质 催化 |
| 收稿时间： | 2015-06-03 |
| 修稿时间： | 2015-06-10 |
Continuous hydrogenolysis of glycerol to 1,2-propanediol on highly active Cu/SiO2 catalysts |
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| ZHOU Wei,ZHAO Yujun,MA Xinbin. Continuous hydrogenolysis of glycerol to 1,2-propanediol on highly active Cu/SiO2 catalysts[J]. Journal of Chemical Industry and Engineering(China), 2015, 66(8): 2999-3006. DOI: 10.11949/j.issn.0438-1157.20150812 |
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| Authors: | ZHOU Wei ZHAO Yujun MA Xinbin |
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| Affiliation: | School of Chemical Engineering and Technology, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | Cu/SiO2 catalysts with different Cu loading were prepared by an ammonia-evaporation method for the glycerol hydrogenolysis in a fixed-bed reactor. The catalysts were characterized by nitrogen adsorption desorption, X-ray powder diffraction, transmission electron microscope, and N2O-H2 titration. It was found that the copper phyllosilicate phase was formed during the preparation of the Cu/SiO2 catalysts. The copper phyllosilicate phase is considered as the dominated contribution to the special characters of the catalyst, such as large surface area, high Cu dispersion as well as strong metal support interactions. As a result, a significant high space-time yield of 4.5 g·g-1·h-1 for 1,2-propanediol and rarely good stability were achieved in the hydrogenolysis of glycerol. Moreover, the strongly adsorbed glycerol at the condition of lower conversion was observed to be one of the important reasons for Cu particle growth, and this negative effect was more remarkable than that of water. |
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| Keywords: | glycerol hydrogenolysis 1,2-propanediol copper phyllosilicates deactivation biomass catalysis |
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