Catalytic microwave-assisted pyrolysis of plastic waste over NiO and HY for gasoline-range hydrocarbons production

Kuan Ding, Shasha Liu, Yong Huang, S. Liu, Nan Zhou, Peng Peng, Y. Wang, Paul L Chen, R. R Ruan

Research output: Contribution to journalArticle

Abstract

Recovering fuels or chemicals from plastic waste via pyrolysis is an innovative and promising route for both energy saving and refuse elimination. In this study, catalytic microwave-assisted pyrolysis of low-density polyethylene (LDPE) was performed to simultaneously improve yield and quality of gasoline-range products. NiO and HY zeolite were respectively used as in-situ and ex-situ catalysts in a two-stage pyrolysis-catalysis system. The results showed that the optimum pyrolysis and catalysis temperatures were 500 °C and 450 °C, respectively, with 56.53 wt% oil product and 93.80% gasoline-range fraction achieved. The content of high-octane-number compounds, primarily aromatics and isomerized aliphatics, increased from 23.5% to 80.4% as HY to LDPE ratio rose from 0 to 1:5. The optimized balance between oil yield and oil quality was obtained at the HY to LDPE ratio of 1:10. The presence of NiO during co-catalysis slightly decreased the oil yield by 5.3–8.5 wt%. Meanwhile, the production of aromatics was promoted obviously while the yield of normal aliphatics was inhibited, which were both favorable to improve the octane number of the oil product. The improved performance of co-catalysis could be related to the suitable hydrogen abstraction ability of NiO, which produced enormous alkenes. Subsequently, cycloalkenes and aromatics were synthesized through Diels-Alder reactions over the catalysis of HY. This co-catalysis approach in the microwave reactor provides a potentially profitable way to convert plastic waste into high-quality and high-yield gasoline fuels.

Original languageEnglish (US)
Pages (from-to)1316-1325
Number of pages10
JournalEnergy Conversion and Management
Volume196
DOIs
StatePublished - Sep 15 2019

Fingerprint

Catalysis
Gasoline
Pyrolysis
Hydrocarbons
Microwaves
Plastics
Low density polyethylenes
Antiknock rating
Aromatic compounds
Olefins
Energy conservation
Oils
Hydrogen
Catalysts
Temperature

Keywords

  • Gasoline fuel
  • Microwave-assisted pyrolysis
  • NiO
  • Plastic waste
  • Y zeolite

Cite this

Catalytic microwave-assisted pyrolysis of plastic waste over NiO and HY for gasoline-range hydrocarbons production. / Ding, Kuan; Liu, Shasha; Huang, Yong; Liu, S.; Zhou, Nan; Peng, Peng; Wang, Y.; Chen, Paul L; Ruan, R. R.

In: Energy Conversion and Management, Vol. 196, 15.09.2019, p. 1316-1325.

Research output: Contribution to journalArticle

Ding, Kuan ; Liu, Shasha ; Huang, Yong ; Liu, S. ; Zhou, Nan ; Peng, Peng ; Wang, Y. ; Chen, Paul L ; Ruan, R. R. / Catalytic microwave-assisted pyrolysis of plastic waste over NiO and HY for gasoline-range hydrocarbons production. In: Energy Conversion and Management. 2019 ; Vol. 196. pp. 1316-1325.
@article{e8cf6af4f41b40fdb551b687a5163f36,
title = "Catalytic microwave-assisted pyrolysis of plastic waste over NiO and HY for gasoline-range hydrocarbons production",
abstract = "Recovering fuels or chemicals from plastic waste via pyrolysis is an innovative and promising route for both energy saving and refuse elimination. In this study, catalytic microwave-assisted pyrolysis of low-density polyethylene (LDPE) was performed to simultaneously improve yield and quality of gasoline-range products. NiO and HY zeolite were respectively used as in-situ and ex-situ catalysts in a two-stage pyrolysis-catalysis system. The results showed that the optimum pyrolysis and catalysis temperatures were 500 °C and 450 °C, respectively, with 56.53 wt{\%} oil product and 93.80{\%} gasoline-range fraction achieved. The content of high-octane-number compounds, primarily aromatics and isomerized aliphatics, increased from 23.5{\%} to 80.4{\%} as HY to LDPE ratio rose from 0 to 1:5. The optimized balance between oil yield and oil quality was obtained at the HY to LDPE ratio of 1:10. The presence of NiO during co-catalysis slightly decreased the oil yield by 5.3–8.5 wt{\%}. Meanwhile, the production of aromatics was promoted obviously while the yield of normal aliphatics was inhibited, which were both favorable to improve the octane number of the oil product. The improved performance of co-catalysis could be related to the suitable hydrogen abstraction ability of NiO, which produced enormous alkenes. Subsequently, cycloalkenes and aromatics were synthesized through Diels-Alder reactions over the catalysis of HY. This co-catalysis approach in the microwave reactor provides a potentially profitable way to convert plastic waste into high-quality and high-yield gasoline fuels.",
keywords = "Gasoline fuel, Microwave-assisted pyrolysis, NiO, Plastic waste, Y zeolite",
author = "Kuan Ding and Shasha Liu and Yong Huang and S. Liu and Nan Zhou and Peng Peng and Y. Wang and Chen, {Paul L} and Ruan, {R. R}",
year = "2019",
month = "9",
day = "15",
doi = "10.1016/j.enconman.2019.07.001",
language = "English (US)",
volume = "196",
pages = "1316--1325",
journal = "Energy Conversion and Management",
issn = "0196-8904",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Catalytic microwave-assisted pyrolysis of plastic waste over NiO and HY for gasoline-range hydrocarbons production

AU - Ding, Kuan

AU - Liu, Shasha

AU - Huang, Yong

AU - Liu, S.

AU - Zhou, Nan

AU - Peng, Peng

AU - Wang, Y.

AU - Chen, Paul L

AU - Ruan, R. R

PY - 2019/9/15

Y1 - 2019/9/15

N2 - Recovering fuels or chemicals from plastic waste via pyrolysis is an innovative and promising route for both energy saving and refuse elimination. In this study, catalytic microwave-assisted pyrolysis of low-density polyethylene (LDPE) was performed to simultaneously improve yield and quality of gasoline-range products. NiO and HY zeolite were respectively used as in-situ and ex-situ catalysts in a two-stage pyrolysis-catalysis system. The results showed that the optimum pyrolysis and catalysis temperatures were 500 °C and 450 °C, respectively, with 56.53 wt% oil product and 93.80% gasoline-range fraction achieved. The content of high-octane-number compounds, primarily aromatics and isomerized aliphatics, increased from 23.5% to 80.4% as HY to LDPE ratio rose from 0 to 1:5. The optimized balance between oil yield and oil quality was obtained at the HY to LDPE ratio of 1:10. The presence of NiO during co-catalysis slightly decreased the oil yield by 5.3–8.5 wt%. Meanwhile, the production of aromatics was promoted obviously while the yield of normal aliphatics was inhibited, which were both favorable to improve the octane number of the oil product. The improved performance of co-catalysis could be related to the suitable hydrogen abstraction ability of NiO, which produced enormous alkenes. Subsequently, cycloalkenes and aromatics were synthesized through Diels-Alder reactions over the catalysis of HY. This co-catalysis approach in the microwave reactor provides a potentially profitable way to convert plastic waste into high-quality and high-yield gasoline fuels.

AB - Recovering fuels or chemicals from plastic waste via pyrolysis is an innovative and promising route for both energy saving and refuse elimination. In this study, catalytic microwave-assisted pyrolysis of low-density polyethylene (LDPE) was performed to simultaneously improve yield and quality of gasoline-range products. NiO and HY zeolite were respectively used as in-situ and ex-situ catalysts in a two-stage pyrolysis-catalysis system. The results showed that the optimum pyrolysis and catalysis temperatures were 500 °C and 450 °C, respectively, with 56.53 wt% oil product and 93.80% gasoline-range fraction achieved. The content of high-octane-number compounds, primarily aromatics and isomerized aliphatics, increased from 23.5% to 80.4% as HY to LDPE ratio rose from 0 to 1:5. The optimized balance between oil yield and oil quality was obtained at the HY to LDPE ratio of 1:10. The presence of NiO during co-catalysis slightly decreased the oil yield by 5.3–8.5 wt%. Meanwhile, the production of aromatics was promoted obviously while the yield of normal aliphatics was inhibited, which were both favorable to improve the octane number of the oil product. The improved performance of co-catalysis could be related to the suitable hydrogen abstraction ability of NiO, which produced enormous alkenes. Subsequently, cycloalkenes and aromatics were synthesized through Diels-Alder reactions over the catalysis of HY. This co-catalysis approach in the microwave reactor provides a potentially profitable way to convert plastic waste into high-quality and high-yield gasoline fuels.

KW - Gasoline fuel

KW - Microwave-assisted pyrolysis

KW - NiO

KW - Plastic waste

KW - Y zeolite

UR - http://www.scopus.com/inward/record.url?scp=85068451116&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068451116&partnerID=8YFLogxK

U2 - 10.1016/j.enconman.2019.07.001

DO - 10.1016/j.enconman.2019.07.001

M3 - Article

VL - 196

SP - 1316

EP - 1325

JO - Energy Conversion and Management

JF - Energy Conversion and Management

SN - 0196-8904

ER -