Preparation of HZSM-5 catalysts with different ratios of structure directing agents and their effects on the decomposition of exo-tetrahydrodicyclopentadiene under supercritical conditions and coke formation

Tae Ho Lee, Hyunchul Jeong, Byung Hun Jeong, Jung Sik Han, Min Yeong Gim, Do Heui Kim, Sung Hyun Kim, Ki Bong Lee

Research output: Contribution to journalArticle

Abstract

Zeolite catalysts (ZSM-5) were synthesized using different ratios of structure directing agents (SDA) and Si/Al, and the synthesized ZSM-5 samples were used in the endothermic decomposition reaction of exo-tetrahydrodicyclopentadiene (exo-THDCP). The ZSM-5 synthesized with a 6.0:100 SDA/SiO2 ratio and Si/Al ratio of 20 (S20/P6.0) showed higher mesoporosity than those of the other synthesized and commercial ZSM-5 catalysts. The decomposition reaction of exo-THDCP using the S20/P6.0 catalyst yielded the highest conversion of 58.4% after 65 min, whereas the commercial catalyst rapidly became deactivated and exhibited only 31.2% conversion, which was the same conversion obtained without the catalyst. The coke analysis results indicated that the ratio of mesopore to micropore volume of the catalyst was a major factor in determining the amount of internal and external coke produced in the catalyst. Moreover, the mesopore/micropore volume ratio affected the composition of soluble coke.

Original languageEnglish
Article number145398
JournalApplied Surface Science
Volume511
DOIs
Publication statusPublished - 2020 May 1

Keywords

  • Catalytic endothermic reaction
  • Coke formation
  • Deactivation
  • Exo-Tetrahydrodicyclopentadiene
  • Structure directing agent
  • Zeolite catalyst

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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