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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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The effect of pre-coking and regeneration on the activity and stability of Zn/ZSM-5 in aromatization of 2-methyl-2-butene

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Title
The effect of pre-coking and regeneration on the activity and stability of Zn/ZSM-5 in aromatization of 2-methyl-2-butene
Other Titles
The effect of pre-coking and regeneration on the activity and stability of Zn/ZSM-5 in aromatization of 2-methyl-2-butene
Author
Kim, Yeon HoLee, Kyung HeeLee, Jae Sung
Keywords
ZEOLITE CATALYSTS; XYLENE ISOMERIZATION; ACIDITY; ALKANES; HZSM-5; HYDROCARBONS; IMPROVEMENT; H-ZSM-5; PROPANE; OLEFINS
Issue Date
2011-12
Publisher
ELSEVIER SCIENCE BV
Citation
CATALYSIS TODAY, v.178, no.1, pp.72 - 78
Abstract
A new method to modify the acidity of zeolite was attempted to improve the activity and stability of Zn/ZSM-5 in aromatization of 2-methyl-2-butene. Pre-coking and regeneration in the presence of O(2) at 773 K generated a large exothermic heat in a short time, which resulted in the thermal dealumination of framework aluminum that acted as a Bronsted acid site. The treatment had a profound effect on the acid properties of the catalyst as probed by (27)Al MAS NMR, temperature-programmed desorption of ammonia, and pyridine FTIR. The results showed that the concentration of oxygen in regeneration step had critical effects on the acidity and stability of Zn/ZSM-5. Thus improvement of lifetime of Zn/ZSM-5 in aromatization of 2-methyl-2-butene was achieved without deteriorating activity and selectivity by the pre-coking and controlled regeneration by oxygen. (C) 2011 Elsevier B. V. All rights reserved
URI
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DOI
10.1016/j.cattod.2011.07.002
ISSN
0920-5861
Appears in Collections:
ECHE_Journal Papers
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