Effects of hierarchical zeolites on aromatization of acetylene

Wonsuk Lee, Taehee Lee, Hoi Gu Jang, Sung June Cho, Jungkyu Choi, Kyoung Su Ha

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The conventional zeolites and the hierarchical zeolites were employed to investigate the catalytic performance of aromatization from acetylene. In the case of the conventional MCM-22 zeolites, the effects of their Si/Al ratio on the catalytic performance were investigated by considering the conversion of acetylene, the selectivity of aromatics, and the formation of cokes. By swelling the interlayers in the MCM-22 precursor followed by pillaring the swollen spaces, hierarchical zeolites with layered nanosheets (i.e., MCM-36) were successfully prepared, characterized and tested for aromatization. With the novel hierarchical zeolite-based catalysts, the effects of structural difference as well as the Si/Al ratio were scrutinized. From the catalytic activity tests, the selectivity towards aromatic compounds through MCM-36 was significantly improved, and the amount of carbon deposition was decreased a lot, probably due to the increased number of external Brønsted acid sites. To draw such conclusion, several characterization techniques were also applied and the results were analyzed. The techniques included physisorption, XRD, FT-IR, TEM, SEM, EDX methods.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Aromatization
Zeolites
Acetylene
Multicarrier modulation
Physisorption
Catalyst selectivity
Aromatic compounds
Nanosheets
Swelling
Energy dispersive spectroscopy
Catalyst activity
Transmission electron microscopy
Carbon
Scanning electron microscopy
Catalysts
Acids

Keywords

  • Acetylene
  • Aromatics
  • Cyclotrimerization
  • Hierarchical zeolite
  • Mesoporosity

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Effects of hierarchical zeolites on aromatization of acetylene. / Lee, Wonsuk; Lee, Taehee; Jang, Hoi Gu; Cho, Sung June; Choi, Jungkyu; Ha, Kyoung Su.

In: Catalysis Today, 2017.

Research output: Contribution to journalArticle

Lee, Wonsuk ; Lee, Taehee ; Jang, Hoi Gu ; Cho, Sung June ; Choi, Jungkyu ; Ha, Kyoung Su. / Effects of hierarchical zeolites on aromatization of acetylene. In: Catalysis Today. 2017.
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