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Citation: HUANG Jingyi, ZHOU Yuming, TANG Menghan, ZHANG Yiwei, ZHOU Shijian, SHENG Xiaoli. Effect of Fluorine on PtSnNaLa/ZSM-5 Catalyzed Dehydrogenation of Propane[J]. Chinese Journal of Applied Chemistry, ;2015, 32(2): 207-213. doi: 10.11944/j.issn.1000-0518.2015.02.140168 shu

Effect of Fluorine on PtSnNaLa/ZSM-5 Catalyzed Dehydrogenation of Propane

1.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China

Corresponding author: ZHOU Yuming,
Received Date: 6 May 2014
Available Online: 25 July 2014
Fund Project: 国家自然科学基金(21376051,21306023,21106017) (21376051,21306023,21106017)江苏省自然科学基金(BK20131288)资助项目 (BK20131288)

Fluorine modified catalyst was prepared by introducing different content of fluorine during the preparation of PtSnNaLa/ZSM-5. These catalysts were used for the dehydrogenation of propane. The effect of fluorine addition on the structure,surface acidity and reaction performance of the catalysts were studied by means of XRD,NH₃-TPD,FT-IR,²⁷Al MAS NMR and TPR. The results indicate that the addition of fluorine reduced the weak-acid strength of the catalyst,but had no obvious influence on the catalyst structure. Meanwhile,the existence of fluorine strengthened the interaction between Pt and the support,and caused the dealumination of the support to some extent. As a result,the reduction of Sn component becomes relatively easy. The influence of fluoride addition on the reaction performance is mainly concentrated on improving the selectivity to propene. As for the catalyst with 0.2% fluoride,the selectivity towards propene can reach 99.2% after the reaction for 7 h.
- fluorine,
- propane dehydrogenation,
- propene,
- catalyst
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