Citation: CAO Zhong-yang, HUANG Xing-liang, GONG Yan, ZI Qin, DAI Xiao-ping, PENG Wen-yu, GAO Yue. A comparison of different zeolites in their catalytic performance in the skeletal isomerization of 1-hexene[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(7): 848-855. shu

A comparison of different zeolites in their catalytic performance in the skeletal isomerization of 1-hexene

College of Chemical Engineering, China University of Petroleum(Beijing), Beijing 102249, China

Corresponding author: HUANG Xing-liang, xlhuang@cpu.edu.cn
Received Date: 4 January 2018
Accepted Date: 4 April 2018

Fund Project: The project was supported by the National Natural Science Foundation of China (21576288)the National Natural Science Foundation of China 21576288

Figures(7)

HZSM-35, HZSM-5, HM and Hβ zeolites were used as the catalysts for the skeletal isomerization of 1-hexene; the relationship between their catalytic performance and physicochemical properties was investigated. The results show that in comparison with HZSM-5 and Hβ, HZSM-35 and HM are provided with suitable acid amount and effective pore size between 0.4-0.6 nm, without bug hole and cross channel; as a result, the later two zeolites exhibit better shape selectivity. With a high conversion of 1-hexene (> 95%), the by-products such as C_5- and C₇₊ in the products are about 20% and the yield of iso-hexene reaches 40%-50%. After the acid-base modification treatment, a slight change in the acidity is observed; however, the catalytic performance of one-dimensional HZSM-35 and HM zeolites in pore isomerization is still much better than that of HZSM-5 and Hβ zeolites with multidimensional pore structure, suggesting that the pore structure plays a key role in the isomerization reaction.
- acid-base modification,
- 1-hexene,
- skeletal isomerization,
- pore structure,
- zeolites
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