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Thermal and catalytic pyrolysis of a synthetic mixture representative of packaging plastics residue

Frontiers of Chemical Science and Engineering 2020年第2期14卷 288-303页

作者： Simona Colantonio Lorenzo Cafiero Doina De Angelis nicolo mippolito Riccardo Tuffi Stefano Vecchio Ciprioti Department for Sustainability ENEA—Casaccia Research CenterRome 00123Italy Department of Chemical Materials and Environmental EngineeringSapienza University of RomeRome 00184Italy Department of SBAI Sapienza University of RomeRome 00161Italy

A synthetic mixture of real waste packaging plastics representative of the residue from a material recovery facility(plasmix)was submitted to thermal and catalytic *** thermogravimetry experiments coupled with Fourier transform infrared spectroscopy were performed to evaluate the effects of the catalysts on the polymers’degradation temperatures and to determine the main compounds produced during *** thermal and catalytic experiments were conducted at 370℃,450℃ and 650℃ using a bench scale *** oil,gas,and char yields were analyzed and the compositions of the reaction products were *** primary aim of this study was to understand the effects of zeolitic hydrogen ultra stable zeolite Y(HUSY)and hydrogen zeolite socony mobil-5(HZSM5)catalysts with high silica content on the pyrolysis process and the products’*** showed that HUSY significantly reduces the degradation temperature of all the polymers—particularly the ***5 had a significant effect on the degradation of polyethylene due to its smaller pore *** balance showed that oil is always the main product of pyrolysis,regardless of the process ***,all pyrolysis runs performed at 370℃ were *** use of either zeolites resulted in a decrease in the heavy oil fraction and the prevention of wax *** has the best performance in terms of the total monoaromatic yield(29 wt-%at 450℃),while HZSM5 promoted the production of gases(41 wt-%at 650℃).Plasmix is a potential input material for pyrolysis that is positively affected by the presence of the two tested zeolites.A more effective separation of polyethylene terephthalate during the selection process could lead to higher quality pyrolysis products.

关键词： packaging plastics waste plasmix pyrolysis zeolite catalyst degradation temperature

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