Journal
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
Volume 142, Issue -, Pages 203-211Publisher
ELSEVIER
DOI: 10.1016/j.psep.2020.06.021
Keywords
Plastic wastes; Pyrolysis with heat carrier; Rotary kiln; Exergy; Energy
Categories
Funding
- Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering, MOE [KLIEEE-19-01]
- Fundamental Research Funds for the Central Universities [DUT18RC(3)036]
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Energy and exergy analysis is a practical thermodynamic method to assess the potentiality of waste-to-energy technologies. In this study, plastic wastes were pyrolyzed in a rotary kiln to recover energy products including gas, oil and char. The effects of heat carrier loading in the kiln and plastic waste types on the pyrolysis process, including carbon distribution, properties of liquid oil/gas, energy and exergy of products, were investigated. Heat carrier loading could enhance the energy and exergy efficiency of the pyrolysis process. The exergy and energy efficiencies of the plastic mixture pyrolysis are in the range of 60.9 %-67.3 % and 59.4-66.0 %, respectively. The energy consumption ratio of polyethylene pyrolysis with 15 % heat carrier loading and plastic mixture pyrolysis with 20 % heat carrier loading showed that the pyrolysis could achieve self-heating by combusting some recycled gas and char products. This work provided an reliable assessment of potentiality of pyrolysis with heat carrier for converting plastic wastes into fuels. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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