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International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao

4 Issues per year

IMPACT FACTOR increased in 2014: 0.592
5-year IMPACT FACTOR: 0.678

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Fast Pyroylysis of Polyolefin Waste over Cracking Catalysts for Producing Hydrocarbon Fuels Using a Fluidized-bed Reactor


2Kao-Yuan University

Citation Information: International Journal of Chemical Reactor Engineering. Volume 10, Issue 1, ISSN (Online) 1542-6580, DOI: 10.1515/1542-6580.3053, August 2012

Publication History

Published Online:


A mixture of post-commercial polyolefin waste (PE/PP/PS) was pyrolyzed over various micro- and mesoporous catalysts using a fluidized-bed reactor operating isothermally at ambient pressure. The yield of volatile hydrocarbons with zeolitic nano-catalysts (n-ZSM-5 > n-MOR > n-USY) were higher than with non-zeolitic catalysts (MCM-41 > ASA). MCM-41 with large mesopores and ASA with weaker acid sites resulted in a highly olefinic product mixture with a wide carbon number distribution, whereas n-USY yielded a saturate-rich product mixture with a wide carbon number distribution and substantial coke levels. A novel developed model based on kinetic and mechanistic considerations which take into account chemical reactions and catalyst deactivation for the catalytic degradation of commingled polyolefin waste has been investigated. This model represents the benefits of product selectivity for the chemical composition such as alkanes, alkenes, aromatics and coke in relation to the performance and the particle size selection of the catalyst used as well as the effect of the fluidizing gas and reaction temperature.

Keywords: polyolefin waste; catalyst; cracking; zeolite

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