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Chemical recycling of plastic waste to monomers : effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste

Oğuzhan Akin (UGent) , Robin John Varghese (UGent) , Andreas Eschenbacher (UGent) , Jogchum Oenema (UGent) , Mehrdad Seifali Abbasabadi (UGent) , Georgios Stefanidis (UGent) and Kevin Van Geem (UGent)
(2023) JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS. 172.
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Abstract
The catalytic upgrading of post-consumer mixed polyolefinic waste pyrolysis vapors has been studied over five different solid acid catalysts to understand the effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4). HZSM-5 with Si/Al ratio of 11 and 27 produced the highest light olefins yields (83.4 wt% and 72.1 wt%, respectively) at a very short contact time of -5 ms while extending the contact time (& GE;23 ms) decreased the olefin yields and resulted in higher yields of aromatics (-30.0 wt% and -40.0 wt%, respectively). Short contact time (5 ms) was not sufficient for HZSM-22 to crack pyrolysis vapors to C2-C4 olefins (8.0 wt%) but increasing contact time improved C2-C4 yields to 53.5 wt% without increased production of aromatics, which may be attributed to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.
Keywords
Analytical Chemistry, Fuel Technology, Plastics, Catalysts, Chemical recycling, Pyrolysis, Olefins, LIGHT OLEFINS, REACTION PATHWAYS, PARTIAL OXIDATION, HDPE PYROLYSIS, CRACKING, METHANOL, HZSM-5, HYDROCARBONS, CONVERSION, POLYPROPYLENE

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Citation

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MLA
Akin, Oğuzhan, et al. “Chemical Recycling of Plastic Waste to Monomers : Effect of Catalyst Contact Time, Acidity and Pore Size on Olefin Recovery in Ex-Situ Catalytic Pyrolysis of Polyolefin Waste.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, vol. 172, 2023, doi:10.1016/j.jaap.2023.106036.
APA
Akin, O., John Varghese, R., Eschenbacher, A., Oenema, J., Seifali Abbasabadi, M., Stefanidis, G., & Van Geem, K. (2023). Chemical recycling of plastic waste to monomers : effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 172. https://doi.org/10.1016/j.jaap.2023.106036
Chicago author-date
Akin, Oğuzhan, Robin John Varghese, Andreas Eschenbacher, Jogchum Oenema, Mehrdad Seifali Abbasabadi, Georgios Stefanidis, and Kevin Van Geem. 2023. “Chemical Recycling of Plastic Waste to Monomers : Effect of Catalyst Contact Time, Acidity and Pore Size on Olefin Recovery in Ex-Situ Catalytic Pyrolysis of Polyolefin Waste.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 172. https://doi.org/10.1016/j.jaap.2023.106036.
Chicago author-date (all authors)
Akin, Oğuzhan, Robin John Varghese, Andreas Eschenbacher, Jogchum Oenema, Mehrdad Seifali Abbasabadi, Georgios Stefanidis, and Kevin Van Geem. 2023. “Chemical Recycling of Plastic Waste to Monomers : Effect of Catalyst Contact Time, Acidity and Pore Size on Olefin Recovery in Ex-Situ Catalytic Pyrolysis of Polyolefin Waste.” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 172. doi:10.1016/j.jaap.2023.106036.
Vancouver
1.
Akin O, John Varghese R, Eschenbacher A, Oenema J, Seifali Abbasabadi M, Stefanidis G, et al. Chemical recycling of plastic waste to monomers : effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS. 2023;172.
IEEE
[1]
O. Akin et al., “Chemical recycling of plastic waste to monomers : effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste,” JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, vol. 172, 2023.
@article{01H8KCCAZPFQH7N44KMQAYSF6A,
  abstract     = {{The catalytic upgrading of post-consumer mixed polyolefinic waste pyrolysis vapors has been studied over five different solid acid catalysts to understand the effect of vapor-catalyst contact time and catalyst properties on the recovery of light olefins (C2-C4). HZSM-5 with Si/Al ratio of 11 and 27 produced the highest light olefins yields (83.4 wt% and 72.1 wt%, respectively) at a very short contact time of -5 ms while extending the contact time (& GE;23 ms) decreased the olefin yields and resulted in higher yields of aromatics (-30.0 wt% and -40.0 wt%, respectively). Short contact time (5 ms) was not sufficient for HZSM-22 to crack pyrolysis vapors to C2-C4 olefins (8.0 wt%) but increasing contact time improved C2-C4 yields to 53.5 wt% without increased production of aromatics, which may be attributed to its small pore size (shape selectivity). SAPO-34, SAPO-11, and Al-MCM-41 were not selective to light olefins at any studied contact time.}},
  articleno    = {{106036}},
  author       = {{Akin, Oğuzhan and John Varghese, Robin and Eschenbacher, Andreas and Oenema, Jogchum and Seifali Abbasabadi, Mehrdad and Stefanidis, Georgios and Van Geem, Kevin}},
  issn         = {{0165-2370}},
  journal      = {{JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS}},
  keywords     = {{Analytical Chemistry,Fuel Technology,Plastics,Catalysts,Chemical recycling,Pyrolysis,Olefins,LIGHT OLEFINS,REACTION PATHWAYS,PARTIAL OXIDATION,HDPE PYROLYSIS,CRACKING,METHANOL,HZSM-5,HYDROCARBONS,CONVERSION,POLYPROPYLENE}},
  language     = {{eng}},
  pages        = {{14}},
  title        = {{Chemical recycling of plastic waste to monomers : effect of catalyst contact time, acidity and pore size on olefin recovery in ex-situ catalytic pyrolysis of polyolefin waste}},
  url          = {{http://doi.org/10.1016/j.jaap.2023.106036}},
  volume       = {{172}},
  year         = {{2023}},
}
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