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Received April 25, 2011
Accepted July 29, 2011
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Pyrolysis of an LDPE-LLDPE-EVA copolymer mixture over various mesoporous catalysts
1Department of Chemical Engineering, Kongju National University, 275, Budae-dong, Seobuk-gu, Cheonan, Chungnam 331-717, Korea 2School of Environmental Engineering, University of Seoul, Korea 3Graduate School of Energy and Environmental System Engineering, , 90, Jeonnong-dong, Dongdaemun-gu, Seoul 130-743, Korea
catalica@uos.ac.kr
Korean Journal of Chemical Engineering, February 2012, 29(2), 196-200(5), 10.1007/s11814-011-0190-6
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Abstract
The aim of the present work was to study the performance of mesoporous catalysts in the catalytic cracking of an LDPE+LLDPE+EVA copolymer. Mesoporous catalysts, including MCM-41, Nano-MCM-41, Al-Nano-MCM-41, MMZ-ZSM-5 and Meso-MFI, were applied for this reaction. Also, microporous HZSM-5 was used for a comparison. All of the catalysts showed higher decomposition abilities than thermal decomposition. The catalytic conversion of the LDPE+LLDPE+EVA copolymer was highest with the use of Meso-MFI due to its pore size and strong Bronsted acidity, with high selectivity for lower olefin and gasoline range hydrocarbon. Both MMZ-ZSM-5 and Al-Nano-MCM-41 have an acid site that induced the decomposition reactions, and thus, produced compounds with lower carbon numbers in liquid products. MCM-41, which exhibits no acidity, showed a similar distribution of liquid products to that via thermal cracking, while Nano-MCM-41 showed better catalytic cracking ability due to its high surface area.
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