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液体石蜡体系中含铜物种的化学变化

樊金串1,杨瑞卿1,赵杰1,黄伟2*   

  1. (1.太原理工大学化学化工学院 太原 030024；
    2.太原理工大学煤科学与技术教育部和山西省重点实验室 太原 030024)
  • 收稿日期:2012-02-16 修回日期:2012-04-26 出版日期:2013-01-10 发布日期:2013-01-10
  • 通讯作者: 黄伟，教授; Tel/Fax:0351-6018073; E-mail:huangwei@tyut.edu.cn; 研究方向：Cl化学及多相催化
  • 基金资助:
    国家自然科学基金(20706039)山西省自然科学基金(2011011006-1)资助项目

Chemical Change of Copper Species in Liquid Paraffin

FAN Jinchuan1, YANG Ruiqing1,  ZHAO Jie1, HUANG Wei2*   

  1. (1.College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;
    2.Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China)
  • Received:2012-02-16 Revised:2012-04-26 Published:2013-01-10 Online:2013-01-10
  • Contact: fan

PDF

1630

被引次数

17 | 13

摘要： 针对完全液相法制备的Cu-Zn-Al催化剂在还原前就有低价态Cu存在的问题，考察了几种不同类型的含铜物质在液体石蜡中热处理时，热处理气氛、催化剂各组分间的相互作用以及铜源种类对热处理产物的影响。 结果表明，液体石蜡在受热情况下能将Cu2+还原，并且遵循先生成Cu+，再生成单质Cu的逐级还原；Cu2+被还原的程度与铜盐的种类和热处理温度有关。 CuO在240 ℃时可以被液体石蜡还原为Cu2O，在300 ℃时被还原为单质Cu；在相同温度下，硝酸铜比乙酸铜更容易被液体石蜡还原。 完全液相法制备的Cu基催化剂在还原前就有低价态Cu存在的根本原因是液体石蜡的存在。

关键词: 铜, 氧化亚铜, 液体石蜡

Abstract: To reveal the chemical species of copper, typically the low-valence speices, in Cu-Zn-Al catalyst prepared by complete liquid-phase method before reduction, the effects of heat-treatment atmosphere, interactions among all components and copper precursor on heattreatment have been systematically studied during the heat treatment of several different kind of copper precursor in liquid paraffin. The results showed that Cu2+ could be reduced by liquid paraffin under heating condition. The Cu+ is formed before the formation of Cu. The reductive degree of Cu2+ was related with the category of copper salts and heat-treatment temperature. CuO can be reduced to Cu2O by liquid paraffin at 240 ℃, and then to Cu at 300 ℃. The copper nitrate could be easily reduced by liquid paraffin than copper acetate at the same temperature. The reason of the low-valent copper appearing in Cu-base catalyst prepared by complete liquid-phase method before reduction could be attributed to the presence of liquid paraffin.

Key words: copper, cuprous oxide, liquid paraffin

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