Citation: ZHANG Wen-fang, ZHANG Min-xiu, WANG Peng-zhao, YANG Chao-he, LI Chun-yi. Study on the structure-reactivity correlation of SO₄^2-/ZrO₂-Al₂O₃ in n-butane isomerization reaction[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(6): 669-674. shu

Study on the structure-reactivity correlation of SO₄^2-/ZrO₂-Al₂O₃ in n-butane isomerization reaction

State Key Laboratory of Heavy Oil Processing, China University of Pertroleum(East China, Qingdao 266580, China

Corresponding author: LI Chun-yi, chuyli@upc.edu.cn
Received Date: 17 March 2017
Revised Date: 17 April 2017

Fund Project: Graduate Student Innovation Project Funds of China University of Petroleum YCXJ2016031the Basic Research Fund of Central University 16CX06009A

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A series of alumina-promoted sulfated zirconia catalysts were prepared by precipitation-impregnation method. The catalysts were characterized by N₂ sorption, pyridine adsorption Fourier transform infrared spectroscopy (Py-FTIR), X-ray diffraction (XRD). Their catalytic performance in n-butane isomerization was evaluated in a continuous flow type fixed-bed micro-reactor at atmospheric pressure, 200℃, and H₂:C₄=2:3, with a weight hourly space velocity of n-butane (WHSV) of 3 h^-1. The structure-reactivity relationship between surface acidity and catalytic behavior was revealed. Py-FTIR indicates that the sulfated treatment enhances the strength and density of catalytic Brønsted acid sites, which are essential for n-butane isomerization. Therefore, sulfated treatment can significantly improve the activity of n-butane isomerization, and Lewis acidity has no direct effect on it.
- SO₄^2-/ZrO₂-Al₂O₃,
- acidity,
- n-butane,
- isomerization
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Study on the structure-reactivity correlation of SO₄^2-/ZrO₂-Al₂O₃ in n-butane isomerization reaction