Alkali Treatment of ZSM-11 Zeolite and Performance for Catalytic Cracking of <em>n</em>-Dodecane

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Abstract

In this paper the effects of alkaline treatment on texture, acid properties and catalytic cracking performance of ZSM-11 zeolites have been studied. Hierarchical ZSM-11 zeolites were prepared by alkali treatment with the different concentration of NaOH solutions. The resulting zeolites were characterized by XRD, SEM, TEM, NH₃-TPD, N₂-adsorpotion/desorpotion and their catalytic performances were evaluated by using catalytic cracking of n-dodecane at 4 MPa and 550 ℃. It is found that alkali treatment on ZSM-11 induced the formation of mesopores in crystals, and increased in the specific surface area and the amount of acid, resulting in the improvement of the conversion of n-dodecane catalytic cracking. The HZSM-11 catalyst obtained by alkaline treatment with 1.0 mol/L NaOH solution exhibited the highest catalytic activity with the enhancement of ca. 58% in the average conversion compared to the untreated HZSM-11zeolite.

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	Articles by authors
	Pu Sijing
	Hao Jiangge
	Liu Guozhu
	Wang Li

Keywords： ZSM-11zeolite； alkaline treatment； catalytic cracking

Received 2014-03-10;

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Cite this article:

Pu Sijing, Hao Jiangge, Liu Guozhu, Wang Li.Alkali Treatment of ZSM-11 Zeolite and Performance for Catalytic Cracking of n-Dodecane[J] Chemcial Industry and Engineering, 2015,V32(4): 13-18

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