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

doi:10.11944/j.issn.1000-0518.2015.02.140168

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (2): 207-213.DOI: 10.11944/j.issn.1000-0518.2015.02.140168

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

HUANG Jingyi, ZHOU Yuming^*, TANG Menghan, ZHANG Yiwei, ZHOU Shijian, SHENG Xiaoli

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

Received:2014-05-06 Revised:2014-07-25 Published:2015-02-10 Online:2015-02-10
Contact: Corresponding author:ZHOU Yuming, professor; Tel/Fax:025-52090617; E-mail:ymzhou@seu.edu.cn; Research interests:catalyst engineering and new catalysis material
Supported by:
; Supported by National Natural Science Foundation of China(No.21376051, No.21306023, No.21106017), Natural Science Foundation of Jiangsu Province of China(No; BK20131288)

Abstract

Abstract:

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.

Key words: fluorine, propane dehydrogenation, propene, catalyst

CLC Number:

O643

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.

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

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