Catalytic fast pyrolysis of low density polyethylene into naphtha with high selectivity by dual-catalyst tandem catalysis

Leilei Dai; Nan Zhou; Hui Li; Yunpu Wang; Yuhuan Liu; Kirk Cobb; Yanling Cheng; Hanwu Lei; Paul Chen; Roger Ruan

doi:10.1016/j.scitotenv.2021.144995

Catalytic fast pyrolysis of low density polyethylene into naphtha with high selectivity by dual-catalyst tandem catalysis

Leilei Dai, Nan Zhou, Hui Li, Yunpu Wang, Yuhuan Liu, Kirk Cobb, Yanling Cheng, Hanwu Lei, Paul Chen, Roger Ruan

Bioproducts and Biosystems Engineering

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

In this work, catalytic fast pyrolysis of low density polyethylene (LDPE) into highly valuable naphtha by the relay catalysis (Al₂O₃ followed by ZSM-5 zeolite) was conducted. Effects of different catalysts, pyrolysis temperatures, catalyst to plastic ratio, and Al₂O₃ to ZSM-5 ratio, on product distribution and selectivity were studied. Al₂O₃ shows an excellent performance for catalytic reforming of LDPE pyrolysis vapors, mainly producing C₅-C₂₃ olefins that are the important precursors to form aromatics via Diels-Alder, aromatization, and polymerization reactions in the pores of ZSM-5 catalyst. Experimental results also show that the selectivity of monoaromatics and C₅-C₁₂ alkanes/olefins can be up to 100% over Al₂O₃ followed by ZSM-5 relay catalysis at the temperature of 550 °C, the catalyst to plastic ratio of 4:1, and Al₂O₃ to ZSM-5 ratio of 1:1. The product (monoaromatics and C₅-C₁₂ alkanes/olefins), naphtha, could be a renewable feedstock for new plastic production in the petroleum industry so that this finding might provide a new insight for a circular economy.

Original language	English (US)
Article number	144995
Journal	Science of the Total Environment
Volume	771
DOIs	https://doi.org/10.1016/j.scitotenv.2021.144995
State	Published - Jun 1 2021

Bibliographical note

Funding Information:
We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019 , 21878137 ), Natural Science Foundation of Jiangxi Province , China ( 20181BAB206030 ), China Scholarship Council (CSC), Xcel Energy , and University of Minnesota Center for Biorefining .

Funding Information:
We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019, 21878137), Natural Science Foundation of Jiangxi Province, China (20181BAB206030), China Scholarship Council (CSC), Xcel Energy, and University of Minnesota Center for Biorefining.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

AlO
Catalytic pyrolysis
Naphtha
Polyethylene
ZSM-5 zeolite

PubMed: MeSH publication types

Journal Article

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title = "Catalytic fast pyrolysis of low density polyethylene into naphtha with high selectivity by dual-catalyst tandem catalysis",

abstract = "In this work, catalytic fast pyrolysis of low density polyethylene (LDPE) into highly valuable naphtha by the relay catalysis (Al2O3 followed by ZSM-5 zeolite) was conducted. Effects of different catalysts, pyrolysis temperatures, catalyst to plastic ratio, and Al2O3 to ZSM-5 ratio, on product distribution and selectivity were studied. Al2O3 shows an excellent performance for catalytic reforming of LDPE pyrolysis vapors, mainly producing C5-C23 olefins that are the important precursors to form aromatics via Diels-Alder, aromatization, and polymerization reactions in the pores of ZSM-5 catalyst. Experimental results also show that the selectivity of monoaromatics and C5-C12 alkanes/olefins can be up to 100% over Al2O3 followed by ZSM-5 relay catalysis at the temperature of 550 °C, the catalyst to plastic ratio of 4:1, and Al2O3 to ZSM-5 ratio of 1:1. The product (monoaromatics and C5-C12 alkanes/olefins), naphtha, could be a renewable feedstock for new plastic production in the petroleum industry so that this finding might provide a new insight for a circular economy.",

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author = "Leilei Dai and Nan Zhou and Hui Li and Yunpu Wang and Yuhuan Liu and Kirk Cobb and Yanling Cheng and Hanwu Lei and Paul Chen and Roger Ruan",

note = "Funding Information: We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019 , 21878137 ), Natural Science Foundation of Jiangxi Province , China ( 20181BAB206030 ), China Scholarship Council (CSC), Xcel Energy , and University of Minnesota Center for Biorefining . Funding Information: We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019, 21878137), Natural Science Foundation of Jiangxi Province, China (20181BAB206030), China Scholarship Council (CSC), Xcel Energy, and University of Minnesota Center for Biorefining. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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AU - Dai, Leilei

AU - Zhou, Nan

AU - Li, Hui

AU - Wang, Yunpu

AU - Liu, Yuhuan

AU - Cobb, Kirk

AU - Cheng, Yanling

AU - Lei, Hanwu

AU - Chen, Paul

AU - Ruan, Roger

N1 - Funding Information: We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019 , 21878137 ), Natural Science Foundation of Jiangxi Province , China ( 20181BAB206030 ), China Scholarship Council (CSC), Xcel Energy , and University of Minnesota Center for Biorefining . Funding Information: We acknowledge the financial support from National Natural Science Foundation of China (No. 21766019, 21878137), Natural Science Foundation of Jiangxi Province, China (20181BAB206030), China Scholarship Council (CSC), Xcel Energy, and University of Minnesota Center for Biorefining. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/6/1

Y1 - 2021/6/1

N2 - In this work, catalytic fast pyrolysis of low density polyethylene (LDPE) into highly valuable naphtha by the relay catalysis (Al2O3 followed by ZSM-5 zeolite) was conducted. Effects of different catalysts, pyrolysis temperatures, catalyst to plastic ratio, and Al2O3 to ZSM-5 ratio, on product distribution and selectivity were studied. Al2O3 shows an excellent performance for catalytic reforming of LDPE pyrolysis vapors, mainly producing C5-C23 olefins that are the important precursors to form aromatics via Diels-Alder, aromatization, and polymerization reactions in the pores of ZSM-5 catalyst. Experimental results also show that the selectivity of monoaromatics and C5-C12 alkanes/olefins can be up to 100% over Al2O3 followed by ZSM-5 relay catalysis at the temperature of 550 °C, the catalyst to plastic ratio of 4:1, and Al2O3 to ZSM-5 ratio of 1:1. The product (monoaromatics and C5-C12 alkanes/olefins), naphtha, could be a renewable feedstock for new plastic production in the petroleum industry so that this finding might provide a new insight for a circular economy.

AB - In this work, catalytic fast pyrolysis of low density polyethylene (LDPE) into highly valuable naphtha by the relay catalysis (Al2O3 followed by ZSM-5 zeolite) was conducted. Effects of different catalysts, pyrolysis temperatures, catalyst to plastic ratio, and Al2O3 to ZSM-5 ratio, on product distribution and selectivity were studied. Al2O3 shows an excellent performance for catalytic reforming of LDPE pyrolysis vapors, mainly producing C5-C23 olefins that are the important precursors to form aromatics via Diels-Alder, aromatization, and polymerization reactions in the pores of ZSM-5 catalyst. Experimental results also show that the selectivity of monoaromatics and C5-C12 alkanes/olefins can be up to 100% over Al2O3 followed by ZSM-5 relay catalysis at the temperature of 550 °C, the catalyst to plastic ratio of 4:1, and Al2O3 to ZSM-5 ratio of 1:1. The product (monoaromatics and C5-C12 alkanes/olefins), naphtha, could be a renewable feedstock for new plastic production in the petroleum industry so that this finding might provide a new insight for a circular economy.

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KW - ZSM-5 zeolite

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Catalytic fast pyrolysis of low density polyethylene into naphtha with high selectivity by dual-catalyst tandem catalysis

Abstract

Bibliographical note

Keywords

PubMed: MeSH publication types

UN SDGs

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