Citation: WANG Hong-hao, LIU Su-yao, ZHANG Huai-ke, GUO Da-guang, MA Jun, REN Jie, WANG Hai-yan. Synthesis and characterization of ZSM-22 zeolites and their catalytic performance in alkylation reaction[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(08): 1010-1016. shu

Synthesis and characterization of ZSM-22 zeolites and their catalytic performance in alkylation reaction

WANG Hong-hao ¹ ,
LIU Su-yao ^2,3 ,
ZHANG Huai-ke ^2,4 ,
GUO Da-guang ¹ ,
MA Jun ¹ ,
REN Jie ^2,4,, ,
WANG Hai-yan ¹

1.
1. Chemical Engineering and Environmental Science, Liaoning Shihua University, Fushun 113001, China;
2.
2. State Engineering Laboratory for Indirect Coal Liquefaction, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
3.
3. University of Chinese Academy of Sciences, Beijing 100049, China;
4.
4. Synfuels China Co. Ltd, Beijing 101407, China

Corresponding author: REN Jie,
Received Date: 30 March 2016
Available Online: 6 May 2016

The ZSM-22 molecular sieves with various morphologies were synthesized by different methods. XRD, SEM, BET, MAS NMR, NH₃-TPD and Py-FTIR were used to study the structure, morphology, surface area, Si-Al coordination and acidity of the samples. Furthermore, the toluene-methanol alkylation as probe reaction was used to investigate the effect of ZSM-22 zeolites morphology on catalytic performance. The lattice parameters, surface areas, Si-Al coordination and acidity of all samples are obviously different. As a result, the interaction of each bundle of the bundle-like ZSM-22 zeolites leads to the structure change of Si(4Si) coordination, the increase of T3 and T4 with decrease of T2 location, and thus displays more L acid sites. At 380℃ reaction temperature, the bundle-like ZSM-22 zeolite catalyst shows high selectivity to p-xylene (76.1%) at about 16.7% conversion in the toluene-methanol alkylation.
- ZSM-22 molecular sieve,
- morphology,
- toluene-methanol alkylation
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