催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (1): 1-3.

• 研究快讯 •    下一篇

整体式锰基催化剂催化分解地表臭氧

余全伟,赵明,刘志敏,张晓玉,郑灵敏,陈耀强,龚茂初   

  1. 四川大学化学学院绿色化学与技术教育部重点实验室, 四川成都 610064
  • 收稿日期:2009-01-25 出版日期:2009-01-25 发布日期:2012-10-17

Catalytic Decomposition of Ozone in Ground Air by Manganese-Based Monolith Catalysts

YU Quanwei, ZHAO Ming, LIU Zhimin, ZHANG Xiaoyu, ZHENG Lingmin, CHEN Yaoqiang, GONG Maochu*   

  1. Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2009-01-25 Online:2009-01-25 Published:2012-10-17

PDF

1243

被引次数

41

摘要： 通过焙烧碳酸锰粉末制备了高活性含缺陷氧原子的氧化锰材料(MnOx, x=1.6～2.0), 用胶溶法制备了高比表面积的SiO2-Al2O3载体,然后用等体积浸渍法制备了不同MnOx担载量的Pd-MnOx/SiO2-Al2O3系列催化剂. 结果表明,催化剂活性随MnOx含量的增加而增加,但无载体的MnOx催化剂易脱落,活性降低. 在空速(GHSV)为360000h-1的条件下, MnOx含量为80%的催化剂对O3的完全转化温度(T100)为30 ℃; 在GHSV=660000h-1时, MnOx含量在80%～90%的催化剂活性最高, T100为45～50 ℃, 能满足在汽车运行时空气与汽车水箱瞬时接触温度的要求. 在45 ℃和510000h-1条件下对MnOx担载量为80%的催化剂进行95 h寿命测试后, O3的转化率大于90%, 说明催化剂具有很强的抗失活能力.

关键词: 臭氧, 缺陷氧型二氧化锰, 钯, 催化分解, 整体式催化剂

Abstract: A series of Pd-MnOx/SiO2-Al2O3 catalysts with different MnOx contents ha d excellent performance of decomposing O3 at high GHSV, low temperature，and l o w concentration. Especially on the catalysts with MnOx content of 80% -90%, T100, the complete conversion temperature, was i n the range of 45-50 ℃, which can meet the decomposition temperat ure of O3. These catalysts had high capacity to resist deactivation.

Key words: ozone, manganese dioxide with deficient oxygen atom, palladium, catalytic decomposition, monolith catalyst