Effect of framework Al siting on catalytic performance in methanol to aromatics over ZSM-5 zeolites

ZHANG Li-wei; ZHANG Huai-ke; CHEN Zhi-qiang; LIU Su-yao; REN Jie

Volume 47 Issue 12

Dec. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(12): 1468-1475

ZHANG Li-wei, ZHANG Huai-ke, CHEN Zhi-qiang, LIU Su-yao, REN Jie. Effect of framework Al siting on catalytic performance in methanol to aromatics over ZSM-5 zeolites[J]. Journal of Fuel Chemistry and Technology, 2019, 47(12): 1468-1475.

Citation:

ZHANG Li-wei, ZHANG Huai-ke, CHEN Zhi-qiang, LIU Su-yao, REN Jie. Effect of framework Al siting on catalytic performance in methanol to aromatics over ZSM-5 zeolites[J]. Journal of Fuel Chemistry and Technology, 2019, 47(12): 1468-1475.

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Effect of framework Al siting on catalytic performance in methanol to aromatics over ZSM-5 zeolites

ZHANG Li-wei^{1, 2},
ZHANG Huai-ke^{1, 3},
CHEN Zhi-qiang^{1, 2},
LIU Su-yao^{3
,
,},
REN Jie^{1, 3
,
,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
National Energy center for Coal to Liquids, Synfuels China Co. Ltd, Beijing 101407, China

Funds:

the National Natural Science Foundation of China 21902171

More Information

Corresponding author: LIU Su-yao, Tel: +86-010-60683824, E-mail: liusuyao@synfuelschina.com.cn; REN Jie, Tel: +86-010-69667855, E-mail: renjie@sxicc.ac.cn
Received Date: 2019-09-23
Rev Recd Date: 2019-10-13

Available Online: 2021-01-23

Publish Date: 2019-12-10

Abstract

Abstract

ZSM-5 zeolites with different framework Al (AlF) siting were hydrothermally synthesized by adding mineralizer, urea, or by changing the silicon source. The morphology, textural properties, AlF siting, and acidity of different ZSM-5 zeolites were characterized using SEM, XRD, BET, XRF, MAS NMR, NH₃-TPD, and Py-IR. Furthermore, the conversion of methanol to aromatics (MTA) was used to investigate the catalytic performance of different catalysts.The results suggested that different ZSM-5 zeolites were highly crystalline with a uniform morphology, but there were large differences in AlF siting and acidity. The AlF in the ellipsoidal ZSM-5 sample was mainly distributed in straight or sinusoidal channels and displayed more acidic sites. AlF of bulk ZSM-5 was mainly located at the intersection of channels, and it showed the lowest amount of strong acid sites. The ellipsoidal ZSM-5 catalyst in which AlF was mainly located in straight or sinusoidal channels exhibited more acidic sites and higher stability and aromatic selectivity during the MTA reaction.
- ZSM-5 zeolites,
- framework Al siting,
- methanol to aromatics

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References(23)

References

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