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›› 2012, Vol. 12 ›› Issue (2): 349-352.

• 材料工程专栏 • 上一篇    下一篇

氯化氢催化氧化制氯气催化剂的失活与再生

杨成武 曹烁 左宜赞 韩明汉   

  1. 清华大学化工系 清华大学化工系 清华大学化工系 清华大学化工系
  • 收稿日期:2012-01-16 修回日期:2012-03-19 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 韩明汉

Regeneration of a Copper Based Catalyst for Sustainable Cl2 Production by HCl Oxidation

YANG Cheng-wu CAO Shuo ZUO Yi-zan HAN Ming-han   

  1. Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University
  • Received:2012-01-16 Revised:2012-03-19 Online:2012-04-20 Published:2012-04-20
  • Contact: HAN Ming-han

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摘要： 对浸渍法制备的Cu含量为8%的HCl催化氧化制Cl2催化剂的失活机理和再生方法进行了研究. 在温度400℃、压力0.12 MPa、摩尔比HCl/O2=1及HCl空速为0.8 h-1的条件下，在石英管固定床反应器中对催化剂进行了300 h的寿命评价. 结果表明，新鲜催化剂活性较好，HCl转化率在70%以上，而反应300 h后HCl转化率降到约50%. 催化剂活性下降的原因是CeO2晶粒聚并和活性组分流失. 较低温度下氯化可使失活催化剂再生，再生后催化剂可使HCl转化率恢复到70%以上.

关键词: 氯化氢, 氯, 催化氧化, 再生, 含Cu催化剂

Abstract: For the conversion of hydrogen chloride to chlorine, a kind of catalyst containing 8% copper was prepared by impregnation method. Its 300 h life test was carried out in a quartz fixed-bed reactor at 400℃, 0.12 MPa, molar ratio of O2 to HCl 1, and HCl weight hourly space velocity (WHSV) 0.8 h-1. It was found that HCl conversion rate decreased from initial 70% to 50% after 300 h evaluation. The deactivation mechanism of catalyst was due to the sintering of CeO2 and loss of active components. The deactivated catalyst can be regenerated by chlorinating at low temperature and making up active components.

Key words: HCl, Cl2, catalytic oxidation, regeneration, copper based catalyst

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