Quantitative infrared spectroscopic studies and 2D COS analysis of xylenes isomerization over hierarchical zeolites

Cited 8 time in webofscience Cited 0 time in scopus
  • Hit : 481
  • Download : 0
The microporous and hierarchical ZSM-5 zeolites were studied with respect to their interaction with o-, m- and p-xylene molecules as well as the catalytic activity in xylenes isomerization process followed by 2D COS analysis of IR spectra. The aspects of mechanism of xylene isomerization reaction have been discussed in the light of the results of 2D COS analysis of IR spectra and catalytic performance of studied zeolites. The ZSM-5 zeolites were characterized by different Si/AI ratio and by various types of generated mesoporosity. This selection assured ability to follow properly the changes in the catalytic performance related not only to acidic properties but also to porosity of the samples. It was shown that the microporous character of zeolites was crucial for high selectivity to the most desired product i.e. p-xylene. In the case of hierarchical zeolites it was confirmed that the formation of by-products as mesitylene and toluene occurred during ortho-xylene isomerization. Furthermore, for hierarchical zeolites the high amount of silanols groups prompted to the coke formation on highly developed external surface. (C) 2016 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-04
Language
English
Article Type
Article; Proceedings Paper
Keywords

H-MFI ZEOLITE; NAOH/TETRABUTYLAMINE HYDROXIDE; IR SPECTROSCOPY; ZSM-5 ZEOLITES; ACID SITES; BETA; DESILICATION; CATALYSTS; NAOH; DISPROPORTIONATION

Citation

CATALYSIS TODAY, v.283, pp.158 - 171

ISSN
0920-5861
DOI
10.1016/j.cattod.2016.02.035
URI
http://hdl.handle.net/10203/220849
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 8 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0