Maximization of FCC light olefins by high severity operation and ZSM-5 addition

A. Aitani*, T. Yoshikawa, T. Ino

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

103 Scopus citations


The effects of high severity operation and ZSM-5 addition on the FCC product yield structure have been studied in a MAT unit. VGO cracking at high reaction temperatures of 500-650°C increases the yield of light olefins (propylene and butenes) with a corresponding loss in gasoline yield and increase in dry gas formation. Similar behavior is observed with the addition of 0-20 wt.% ZSM-5 additive, however, with no increase in dry gas. The combination of the two effects (high severity and ZSM-5 addition) makes the FCC unit an excellent source of light olefins for downstream petrochemical and alkylation units. A novel downer reactor FCC configuration is proposed to suppress thermal cracking reactions and dry gas formation during high severity operation.

Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalCatalysis Today
Issue number1
StatePublished - 10 Jul 2000

Bibliographical note

Funding Information:
This work is part of a joint research project (PN21156) between KFUPM, Saudi Arabia and Petroleum Energy Center, Japan. The project is supported by a grant from the Ministry of International Trade and Industry of Japan. The authors wish to thank the support of the Research Institute at KFUPM and PEC in publishing this paper.

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


Dive into the research topics of 'Maximization of FCC light olefins by high severity operation and ZSM-5 addition'. Together they form a unique fingerprint.

Cite this