Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking

Jiangge Hao; Ying Wang; Guozhu Liu; Jingwen Zhang; Guozhu Li; Xuesong Ma

doi:10.1016/j.cjche.2014.06.008

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Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking

第四届整体式结构化催剂与反应器国际会议专栏 | Updated：2026-01-06

- Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking
- Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking
- 中国化学工程学报（英文版） 2014年22卷第8期页码：869-874
- Affiliations：
  
  Science and Technology on Scramjet Laboratory,Beijing,China,100074
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.06.008
  中图分类号：
- 纸质出版：2014
- Accepted：
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Jiangge Hao, Ying Wang, Guozhu Liu, 等. Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking[J]. 中国化学工程学报（英文版）, 2014,22(8):869-874.

-Dodecane Cracking[J]. Chinese Journal of Chemical Engineering, 2014, 22(8): 869-874.
Jiangge Hao, Ying Wang, Guozhu Liu, 等. Synthesis of ITQ-2 Zeolites and Catalytic Performance in n-Dodecane Cracking[J]. 中国化学工程学报（英文版）, 2014,22(8):869-874. DOI： 10.1016/j.cjche.2014.06.008.

-Dodecane Cracking[J]. Chinese Journal of Chemical Engineering, 2014, 22(8): 869-874. DOI： 10.1016/j.cjche.2014.06.008.

摘要

Abstract

ITQ-2 zeolites were prepared by sequential alkali-swelling and ultrasonic-delamination of precursor MCM-22 and characterized by X-ray powder diffraction

scanning electron microscopy

nitrogen adsorption-desorption

ammonia temperature-programmed desorption and in-situ Fourier-transform infrared spectroscopy. The delamination induced a change in the morphology of ITQ-2 zeolites from aggregated thin platelets to scattered platelets

together with a significant increase in external specific surface area

which reached a plateau at the ultrasonic treatment time of 3 h. The catalytic cracking of n-dodecane over ITQ-2 zeolites was evaluated with ITQ-2 coated on the inside wall of a tubular reactor at 550℃ and 4 MPa. The sample obtained by ultrasonic treatment of 3 h (ITQ-2-3) gave the highest initial conversion of n-dodecane

whereas those of 5 h and 1 h gave the conversion even lower than MCM-22

which was in agreement with the trend of the ratio of strong Lewis acid to the total acid amount. Although the amount of cokes deposited on ITQ-2-3 was larger than that on MCM-22

the former deactivated slowly

suggesting that a large external specific surface area benefits the stability of zeolite coatings.

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