期刊
WASTE MANAGEMENT
卷 31, 期 8, 页码 1852-1858出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2011.04.004
关键词
Pyrolysis; Feedstock recycling; Catalytic decomposition; Plastic wastes; ZSM-5 zeolite; Regeneration
资金
- Spanish Ministry of Education and Science (MEC) [CTQ 2007-67070/PPQ]
- Basque Country Government [ETORTEK 2007 IE07-207, GIC 07-09-IT-354-07]
In this work, a study of the regeneration and reuse of ZSM-5 zeolite in the pyrolysis of a plastic mixture has been carried out in a semi-batch reactor at 440 degrees C. The results have been compared with those obtained with fresh-catalyst and in non-catalytic experiments with the same conditions. The use of fresh catalyst produces a significant change in both the pyrolysis yields and the properties of the liquids and gases obtained. Gases more rich in C3-C4 and H(2) are produced, as well as lower quantities of aromatic liquids if compared with those obtained in thermal decomposition. The authors have proved that after one pyrolysis experiment the zeolite loses quite a lot of its activity, which is reflected in both the yields and the products quality; however, this deactivation was found to be reversible since after regeneration heating at 550 degrees C in oxygen atmosphere, this catalyst recovered its initial activity, generating similar products and in equivalent proportions as those obtained with fresh catalyst. (C) 2011 Elsevier Ltd. All rights reserved.
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