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

  • Catalysis, Reaction Engineering
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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.

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Authors and Affiliations

  1. Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran

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

  2. Oil and Gas Center of Excellence, University of Tehran, P. O. Box 11155/4563, Tehran, Iran

    Abbas Ali Khodadadi & Yadolla Mortazavi

Authors
  1. Mahdi Davoodpour
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  2. Reza Tafreshi
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  3. Abbas Ali Khodadadi
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  4. Yadolla Mortazavi
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Corresponding author

Correspondence to Abbas Ali Khodadadi.

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11814_2016_327_MOESM1_ESM.pdf

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

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Davoodpour, M., Tafreshi, R., Khodadadi, A.A. et al. Two-stage cracking catalyst of amorphous silica-alumina on Y zeolite for enhanced product selectivity and suppressed coking. Korean J. Chem. Eng. 34, 681–691 (2017). https://doi.org/10.1007/s11814-016-0327-8

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  • DOI: https://doi.org/10.1007/s11814-016-0327-8

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