Two-stage cracking catalyst of amorphous silica-alumina on Y zeolite for enhanced product selectivity and suppressed coking

Mahdi Davoodpour, Reza Tafreshi, Abbas Ali Khodadadi, Yadolla Mortazavi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel bilayer catalyst composed of amorphous silica-alumina (ASA) layer coated on Y zeolite layer is proposed as a fluid catalytic cracking (FCC) catalyst to cause two-stage reactions of pre-cracking and deep-cracking. The bilayer catalyst (Y/ASA) is compared with the usual mixed one (ASA+Y), in catalytic cracking of a feed composed of 1,3,5-triisopropylbenzene and naphthalene. The two catalyst representations were prepared by applying layers of Y zeolite and ASA or both on inert monolith supports. Catalytic cracking experiments were carried out at 300, 350 and 400 °C. Compared to Y+ASA, Y/ASA yielded about 33% and 46% more benzene and toluene, respectively, and 18% less coke in the catalytic cracking at 350 oC. The coke of Y/ASA was less refractory than that of Y+ASA as burnt at lower temperatures, while emitting less carbon monoxide in regeneration. Y/ASA configuration shows promising features as FCC catalysts for increased bottoms cracking and suppressed coking.

Original languageEnglish
Pages (from-to)681-691
Number of pages11
JournalKorean Journal of Chemical Engineering
Volume34
Issue number3
DOIs
Publication statusPublished - 1 Mar 2017
Externally publishedYes

Fingerprint

Zeolites
Catalyst selectivity
Aluminum Oxide
Coking
Silicon Dioxide
Alumina
Silica
Catalysts
Catalytic cracking
Fluid catalytic cracking
Coke
Toluene
Carbon Monoxide
Naphthalene
Benzene
Carbon monoxide
Refractory materials

Keywords

  • Acid Sites
  • Coke
  • FCC
  • Preliminary Cracking
  • Silica-alumina

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Two-stage cracking catalyst of amorphous silica-alumina on Y zeolite for enhanced product selectivity and suppressed coking. / Davoodpour, Mahdi; Tafreshi, Reza; Khodadadi, Abbas Ali; Mortazavi, Yadolla.

In: Korean Journal of Chemical Engineering, Vol. 34, No. 3, 01.03.2017, p. 681-691.

Research output: Contribution to journalArticle

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