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›› 2010, Vol. 10 ›› Issue (4): 781-787.

• 材料工程专栏 • 上一篇    下一篇

用于低温液相合成甲醇的Cu/MgO/ZnO催化剂

李源 张香平 王蕾 李春山 刘龙 张天龙 张锁江   

  1. 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所
  • 收稿日期:2010-05-20 修回日期:2010-06-07 出版日期:2010-08-20 发布日期:2010-08-20
  • 通讯作者: 李源

Study on Cu/MgO/ZnO Catalyst for Low-temperature Synthesis of Methanol

LI Yuan ZHANG Xiang-ping WANG Lei LI Chun-shan LIU Long ZHANG Tian-long ZHANG Suo-jiang   

  1. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Institute of process Engineering, CAS Institute of Process Engineering, Chinese Academy of Sciences Laboratory for Green Chemistry and Technology, Institute of Process Engineering, Chinese Academy of Sciences Laboratory for Green Chemistry and Technology, Institute of Process Engineering, Chinese Academy of Sciences Laboratory for Green Chemistry and Technology, Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, CAS
  • Received:2010-05-20 Revised:2010-06-07 Online:2010-08-20 Published:2010-08-20
  • Contact: LI Yuan

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被引次数

8

摘要： 采用并流共沉淀法制备了不同Cu:(Mg+Zn)及Mg:Zn摩尔比的铜基催化剂Cu/MgO/ZnO，用于低温液相甲醇的合成，并对比了Cu/ZnO及Cu/MgO催化剂，分析了催化剂中载体MgO的作用. 结果表明，MgO的引入有利于催化剂中Cu+的生成并均匀分散在载体中，可提高催化剂的催化活性. 以合成气CO+H2为原料，在443 K和5.0 MPa条件下，采用液体石蜡作溶剂，考察了催化剂的催化性能. 结果表明，Cu/MgO/ZnO催化剂的活性优于Cu/ZnO和Cu/MgO催化剂，且当Cu:Mg:Zn=2:1:1时催化性能最好，此时合成气中CO的转化率为63.56%，甲醇的选择性为99.09%，时空收率为5.413 mol/(kg×h). 分析了Cu/MgO催化剂在高温反应条件下的失活现象，认为铜烧结是其失活的主要原因.

关键词: 低温, 液相, 甲醇, 合成气, 铜基催化剂

Abstract: A series of Cu/MgO/ZnO catalysts with different Cu:(Mg+Zn) and Mg:Zn molar ratios were prepared by conventional co-precipitation method, which are used for low-temperature methanol synthesis. And Cu/ZnO and Cu/MgO catalysts were prepared as well. Comparison was made among them by characterization. Addition of MgO to Cu/ZnO catalyst could introduce more dispersed Cu+ sites, therefore the catalytic activity was promoted. At 443 K and 5.0 MPa, the activities of prepared catalysts were tested in a slurry reactor using liquid paraffin as solvent. The results indicated that the activity of Cu/MgO/ZnO catalyst was superior to that of Cu/ZnO and Cu/MgO, and when Cu:Mg:Zn=2:1:1, the catalyst had the highest activity: the conversion rate of CO was as high as 63.56%, and the selectivity and space time yield of methanol reached 99.09% and 5.413 mol/(kg×h) respectively. The deactivation phenomenon of Cu/MgO/ZnO catalyst was observed under high reaction temperature, and the characterization results indicated that it was due to the sintering of Cu particles.

Key words: low-temperature, liquid phase, methanol, syngas, copper-based catalyst

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