Xiao, Haoyu, Harding, Jonathan 
ORCID: 0000-0002-9920-7831, Lei, Shuaishuai, Chen, Wei, Xia, Sunwen, Cai, Ning, Chen, Xu, Hu, Junhao, Chen, Yingquan, Wang, Xianhua et al (show 3 more authors)
(2022)
Hydrogen and aromatics recovery through plasma-catalytic pyrolysis of waste polypropylene.
JOURNAL OF CLEANER PRODUCTION, 350.
p. 131467.
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Abstract
Plasma-catalysis pyrolysis is a promising way to solve the problem of catalyst deactivation during plastic recycling. In this study, pyrolysis of polypropylene (PP) over zeolite ZSM-5 has been carried out in a two-stage fixed bed pyrolysis system with a coaxial dielectric barrier discharge (DBD) plasma reactor. The role of plasma on the pyrolysis process, as well as the stability of the plasma-catalytic system was investigated. Compared to conventional catalytic pyrolysis, plasma-catalysis pyrolysis increased gas products from 29 wt% to 47 wt% with 4.19 mmol/g H2 formed, and improved the selectivity of BTX (benzene, toluene, xylene) whilst inhibiting the production of wax simultaneously. After 10 cycles, clear decreases in gas and oil yield (from 86 wt% to 48 wt%) and BTX selectivity (from 71 wt% to 39 wt%) were found in the conventional catalytic pyrolysis, however, nearly no variation was shown in the plasma-catalysis mode. The coupling of catalyst and plasma modified the catalysts acidic sites, while the radicals enhanced the pre-cracking of volatiles, resulting in less deposited coke. Overall, the introduction of plasma resulted in an obvious reduction in total costs and presented a feasible strategy for the recycling of waste plastic.
| Item Type: | Article |
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| Uncontrolled Keywords: | Plastic waste, Catalytic pyrolysis, Plasma enhanced, Hydrogen, Aromatics |
| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 06 Apr 2022 13:30 |
| Last Modified: | 24 Mar 2023 02:30 |
| DOI: | 10.1016/j.jclepro.2022.131467 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3152261 |
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