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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (20): 2285-2290. 上一篇    下一篇

研究论文

紫外/臭氧法在脱除沸石有机模板剂中的应用

解丽丽1，袁昊1，胡柳花2，金杏妹2，吴秀华1，王利军1，田震1，李庆华*,1   

  1. (1上海第二工业大学环境工程系 上海 201209)
    (2华东理工大学工业催化研究所 上海 200237)
  • 投稿日期:2007-01-10 修回日期:2007-03-12 发布日期:2007-10-28
  • 通讯作者: 李庆华

Application of UV/ozone Treatment to the Removal of the Organic Template from Zeolites

XIE Li-Li1; YUAN Hao1; HU Liu-Hua2; JIN Xing-Mei2; WU Xiu-Hua1; WANG Li-Jun1; TIAN Zhen1; LI Qing-Hua*,1   

  1. (1 Department of Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209)
    (2 Institute of Catalysis, East China University of Science and Technology, Shanghai 200237)
  • Received:2007-01-10 Revised:2007-03-12 Published:2007-10-28
  • Contact: LI Qing-Hua

PDF

895

被引次数

18

选取LTA, FAU, BETA, MFI和MEL型沸石, 研究紫外/臭氧法在沸石有机模板剂脱除中的应用, 并与传统高温焙烧法比较, 考察两种方法对有机模板剂的脱除能力. 采用XRD, FT-IR, BET等方法对脱除模板剂前后的沸石样品进行表征, 结果表明紫外/臭氧法是一种低温有效除去沸石模板剂的方法. Beta, silicalite-1和silicalite-2沸石在紫外光照后相应的模板剂四乙基氢氧化铵、四丙基氢氧化铵和四丁基氢氧化铵已彻底脱除, A和Y型沸石中分别有27.5和6.2 wt%的四甲基氢氧化铵模板剂残留, 这主要是受其特殊β笼结构的限制而引起的.

关键词: 沸石, 紫外/臭氧法, 有机模板剂

UV/ozone treatment was used to remove the organic templates from LTA, FAU, BETA, MFI and MEL type zeolites. High temperature calcination method was also used as a comparison. Zeolite samples were characterized by XRD, FT-IR, BET, etc. The results showed that this UV/ozone treatment was an effective method to remove the templates from zeolites under mild conditions. The TEA＋, TPA＋ and TBA＋ template cations were completely decomposed and eliminated from the corresponding zeolite beta, silicalite-1 and silicalite-2. Whereas, a trace amount of TMA＋ template cations still remained in the UV/ozone treated zeolite A (27.5 wt%) and Y (6.2 wt%). This is probably due to the existence of small β cages in the zeolites A and Y.

Key words: zeolites, UV/ozone, organic template