Controlling hydrocarbon oligomerization in phosphorus-modified CHA zeolite for a long-lived methanol-to-olefin catalyst

Nao Tsunoji, Ryota Osuga, Masumi Yasumoto, Toshiyuki Yokoi

Research output: Contribution to journalArticlepeer-review

Abstract

The catalytic performance of phosphorus-modified CHA zeolites, synthesized by direct phosphorus modification using tetraethylphosphonium as a phosphorus-modifying agent (P-MA), was investigated for the methanol-to-olefin (MTO) reaction. Comparative catalytic testing in the MTO reaction revealed that the phosphorus modification effectively prolonged the catalyst lifetime while hardly affecting the ethene and propene selectivities. The initial ethene and propene selectivities over CHA zeolite with P/Al ratio of 0.44 were 28.7 and 37.5 C %, respectively, and the catalytic life time improved from 4 to 7 h compared with the catalyst without phosphorus modification. The relative amount of non-aromatic hydrocarbons retained in the zeolite catalysts with respect to those of the aromatic ones increased with increasing degree of phosphorus modification. This demonstrates that the suppression of excess oligomerization of the hydrocarbon species results in a prolonged lifetime in the phosphorus-modified catalyst.

Original languageEnglish
Article number118176
JournalApplied Catalysis A: General
Volume620
DOIs
Publication statusPublished - 2021 Jun 25
Externally publishedYes

Keywords

  • CHA zeolite
  • Hydrothermal conversion of zeolite
  • Interzeolite conversion
  • Methanol to olefin reaction
  • Phosphorus modification
  • Phosphorus modifying agent

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Fingerprint

Dive into the research topics of 'Controlling hydrocarbon oligomerization in phosphorus-modified CHA zeolite for a long-lived methanol-to-olefin catalyst'. Together they form a unique fingerprint.

Cite this