Enhanced p-selectivity from separation of the mixture containing p-chloronitrobenzene and o-chloronitrobenzene with Sb2O3 modified HZSM-5 zeolite

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• 作者：Zhaobing Guo ; Gang Zeng ; Jie Liu ; Fengling Liu ; Shourong Zheng
• 关键词：p ; Selectivity ; Chloronitrobenzene isomers ; Sb2O3 modified HZSM ; 5 zeolite
• 刊名：Adsorption
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：21
• 期：5
• 页码：365-371
• 全文大小：602 KB
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• 作者单位：Zhaobing Guo (1) (2)
  Gang Zeng (1) (2)
  Jie Liu (1) (2)
  Fengling Liu (1) (2)
  Shourong Zheng (3)
  
  1. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, People’s Republic of China
  2. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing, 210044, People’s Republic of China
  3. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210093, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Surfaces and Interfaces and Thin Films
  Industrial Chemistry and Chemical Engineering
  Engineering Thermodynamics and Transport Phenomena
  
• 出版者：Springer Netherlands
• ISSN：1572-8757

文摘

HZSM-5 zeolite was modified with Sb2O3 powder, and p-selectivity from separation of the mixture containing p-chloronitrobenzene (p-CNB) and o-chloronitrobenzene (o-CNB) in modified HZSM-5 zeolite was simultaneously studied. It can be observed that Sb2O3 was mainly dispersed on external surface of HZSM-5 zeolite, which might finely narrow pore opening of the zeolite. The maximum adsorption amount of p-CNB in the modified zeolite was about 4 molecules per unit cell, which was larger compared to that of o-CNB. In addition, the diffusion coefficient of p-CNB in Sb2O3 modified HZSM-5 at 300?K is observed to be about 531 times higher than that of o-CNB. Compared to 85?% p-CNB purity recovered from parent HZSM-5 zeolite, the more remarkable differences in adsorption capacity and diffusivity between p-CNB and o-CNB in Sb2O3 modified HZSM-5 led to a higher p-CNB purity of 98.4?%, which indicates that p-selectivity of HZSM-5 zeolite was significantly enhanced through the modification with Sb2O3 powder.