Citation: ZHANG Jun-tao, SONG Jing, ZHEN Xing, SHEN Zhi-bing, LIANG Sheng-rong. Synthesis of MCM-41/MOR composite molecular sieves and its catalytic properties for isomerization of alkane[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(6): 675-681. shu

Synthesis of MCM-41/MOR composite molecular sieves and its catalytic properties for isomerization of alkane

Research Center of Petroleum Processing & Petrochemicals, Xi'an Shiyou University, Xi'an 710065, China

Corresponding author: ZHANG Jun-tao, zhangjt@xsyu.edu.cn
Received Date: 16 December 2016
Revised Date: 9 April 2017

Fund Project: the National Natural Science Foundation of China 21606177the Excellent Master Degree Thesis Cultiration of Xi'an Shiyou University 2015yp140709

Figures(7)

The MCM-41/MOR composite molecular sieves with multiple micro-mesoporous structure were hydrothermally synthesized by using the alkali-treated MOR seriflux as partial silica-alumina source and cetyltrimethylammonium bromide(CTAB) as the template in self-assembly process. The synthesized samples of molecular sieves were characterized by XRD, HRTEM, BET and Py-FTIR, respectively. The results showed that the samples exhibit a hierarchical micro-mesoporous structure, large specific surface area and good hydrothermal stability as well. The isomerization performance of the composite zeolite catalyst was evaluated in a fixed bed microreactor. The results showed that the appropriate B and L acid coordinated with each other to act as the active center of alkane isomerization, while Ni species were not only active site for this reaction, but also played a good role in the modification of acidity. Compared with Ni-MOR, Ni-MCM-41 and HMCM-41/MOR, the Ni-MCM-41/MOR catalyst had better catalytic performance for isomerization reaction, the conversion of n-hexane is 34.40%, and the selectivity of i-C₆⁰ is 40.38%.
- MOR,
- MCM-41,
- composite molecular sieve,
- hydrothermal synthesis,
- isomerization
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