催化学报

催化学报 ›› 2014, Vol. 35 ›› Issue (8): 1359-1363.DOI: 10.1016/S1872-2067(14)60166-2

• 论文 • 上一篇    下一篇

KCl对Cu-K-La/γ-Al2O3催化剂上HCl氧化反应性能的影响

冯看卡a, 李晨威a, 郭杨龙a, 詹望成a, 马斌全b, 陈斌武b, 袁茂全b, 卢冠忠a   

  1. a. 结构可控先进功能材料及其制备教育部重点实验室, 华东理工大学工业催化研究所, 上海 200237;
    b. 上海氯碱化工股份有限公司, 上海 200241
  • 收稿日期:2014-05-01 修回日期:2014-06-13 出版日期:2014-08-01 发布日期:2014-08-05
  • 通讯作者: 郭杨龙, 卢冠忠
  • 基金资助:

    国家重点基础研究发展计划（973计划，2010CB732300）；上海市科委项目（13521103402）；上海市曙光计划（10SG30）.

Effect of KCl on the performance of Cu-K-La/γ-Al2O3 catalyst for HCl oxidation

Kanka Fenga, Chenwei Lia, Yanglong Guoa, Wangcheng Zhana, Binquan Mab, Binwu Chenb, Maoquan Yuanb, Guanzhong Lua   

  1. a. Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China;
    b. Shanghai Chlor-Alkali Chemical Co., Ltd., Shanghai 200241, China
  • Received:2014-05-01 Revised:2014-06-13 Online:2014-08-01 Published:2014-08-05
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2010CB732300), Commission of Science and Technology of Shanghai Municipality (13521103402), and Shu Guang Project of Shanghai Municipal Education Commission and Shanghai Education Development Foundation (10SG30).

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摘要：

采用等体积浸渍法制备了Cu-K-La/γ-Al2O3催化剂，考察了KCl对该催化剂催化HCl氧化制Cl2反应性能的影响. 当KCl的负载量为5 wt%时，Cu-K-La/γ-Al2O3催化剂表现出较好的催化活性和稳定性，可在较大的原料气空速变化范围内使用. 在0.1 MPa，360 ℃，空速450 L/（kg-cat·h）和HCl/O2摩尔比为2：1的反应条件下，Cu-K-La/γ-Al2O3催化剂上HCl转化率在100 h内保持85%以上. 表征结果表明，Cu，K和La物种均高度分散于γ-Al2O3载体表面；一定量KCl的加入可降低Cu2+ → Cu+的还原温度，从而提高Cu2+活性中心的催化活性.

关键词: 氯化氢, 催化氧化, 氯气, 铜基催化剂, 氯化钾

Abstract:

Cu-K-La/γ-Al2O3 catalysts prepared by the incipient wetness impregnation for the catalytic oxidation of HCl to Cl2 at atmospheric pressure were investigated for the effect of KCl on the catalyst performance. Cu-K-La/γ-Al2O3 catalyst with 5 wt% KCl loading showed good activity and stability due to the promotion by KCl. It gave good activity over a wide range of space velocity of the feed gas and conversion of HCl above 85%, and it was nearly unchanged in activity after 100 h reaction at the conditions of 0.1 MPa, 360 ℃, space velocity of 450 L/(kg-cat·h), and HCl/O2 molar ratio = 2:1. X-ray diffraction results indicated that Cu, K, and La species were highly dispersed on the surface of the γ-Al2O3 support. H2 temperature-programmed reduction results indicated that the addition of KCl favored the reduction of Cu2+ to Cu+ and improved the activity of the active sites of Cu2+ species for HCl oxidation.

Key words: Hydrogen chloride, Catalytic oxidation, Chlorine, Copper-based catalyst, Potassium chloride