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Title: Converting polycarbonate and polystyrene plastic wastes intoaromatic hydrocarbons via catalytic fast co-pyrolysis

Abstract

Thermochemical conversion of plastic wastes is a promising approach to produce alternative energy-based fuels. Herein, we conducted catalytic fast co-pyrolysis of polycarbonate (PC) and polystyrene (PS) to generate aromatic hydrocarbons using HZSM-5 (Zeolite Socony Mobil-5, hydrogen, Aluminosilicate) as a catalyst. The results indicated that employing HZSM-5 in the catalytic conversion of PC facilitated the synthesis of aromatic hydrocarbons in comparison to the non-catalytic run. A competitive reaction between aromatic hydrocarbons and aromatic oxygenates was observed within the studied temperature region, and catalytic degradation temperature of 700 °C maximized the competing reaction towards the formation of targeted aromatic hydrocarbons at the expense of phenolic products. Catalyst type also played a vital role in the catalytic decomposition of PC wastes, and HZSM-5 with different Si/Al molar ratios produced more aromatic hydrocarbons than HY (Zeolite Y, hydrogen, Faujasite). Regarding the effect of Si/Al molar ration in HZSM-5 on the distribution of monocyclic aromatic hydrocarbons (MAHs), a Si/Al molar ratio of 38 maximized benzene formation with an advanced factor of 5.1. Catalytic fast co-pyrolysis of PC with hydrogen-rich plastic wastes including polypropylene (PP), polyethylene (PE), and polystyrene (PS) favored the production of MAHs, and PS was the most effective hydrogen donor with a ~2.5-foldmore » increase. The additive effect of MAHs increased at first and then decreased when the PC percentage was elevated from 30 % to 90 %, achieving the maximum value of 32.4 % at 70 % PC.« less

Authors:
 [1];  [2]; ORCiD logo [3];  [2];  [2]; ORCiD logo [4];  [5];  [6]; ORCiD logo [7]; ORCiD logo [8]
  1. Nanjing Forestry Univ. (China); Chinese Academy of Forestry, Nanjing (China); Southeast Univ., Nanjing (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Nanjing Forestry Univ. (China); Chinese Academy of Forestry, Nanjing (China)
  3. Nanjing Xiaozhuang Univ. (China)
  4. Univ. of Canterbury, Christchurch (New Zealand)
  5. Southeast Univ., Nanjing (China)
  6. Chinese Academy of Forestry, Nanjing (China)
  7. Univ. of Minnesota, St. Paul, MN (United States)
  8. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1649187
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Hazardous Materials
Additional Journal Information:
Journal Volume: 386; Journal Issue: 1; Journal ID: ISSN 0304-3894
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Wang, Ruizhen, Wang, Kui, Pang, Shusheng, Zhong, Zhaoping, Sun, Yunjuan, Ruan, Roger, and Ragauskas, Arthur J. Converting polycarbonate and polystyrene plastic wastes intoaromatic hydrocarbons via catalytic fast co-pyrolysis. United States: N. p., 2019. Web. https://doi.org/10.1016/j.jhazmat.2019.121970.
Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Wang, Ruizhen, Wang, Kui, Pang, Shusheng, Zhong, Zhaoping, Sun, Yunjuan, Ruan, Roger, & Ragauskas, Arthur J. Converting polycarbonate and polystyrene plastic wastes intoaromatic hydrocarbons via catalytic fast co-pyrolysis. United States. https://doi.org/10.1016/j.jhazmat.2019.121970
Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Wang, Ruizhen, Wang, Kui, Pang, Shusheng, Zhong, Zhaoping, Sun, Yunjuan, Ruan, Roger, and Ragauskas, Arthur J. Tue . "Converting polycarbonate and polystyrene plastic wastes intoaromatic hydrocarbons via catalytic fast co-pyrolysis". United States. https://doi.org/10.1016/j.jhazmat.2019.121970. https://www.osti.gov/servlets/purl/1649187.
@article{osti_1649187,
title = {Converting polycarbonate and polystyrene plastic wastes intoaromatic hydrocarbons via catalytic fast co-pyrolysis},
author = {Wang, Jia and Jiang, Jianchun and Wang, Xiaobo and Wang, Ruizhen and Wang, Kui and Pang, Shusheng and Zhong, Zhaoping and Sun, Yunjuan and Ruan, Roger and Ragauskas, Arthur J.},
abstractNote = {Thermochemical conversion of plastic wastes is a promising approach to produce alternative energy-based fuels. Herein, we conducted catalytic fast co-pyrolysis of polycarbonate (PC) and polystyrene (PS) to generate aromatic hydrocarbons using HZSM-5 (Zeolite Socony Mobil-5, hydrogen, Aluminosilicate) as a catalyst. The results indicated that employing HZSM-5 in the catalytic conversion of PC facilitated the synthesis of aromatic hydrocarbons in comparison to the non-catalytic run. A competitive reaction between aromatic hydrocarbons and aromatic oxygenates was observed within the studied temperature region, and catalytic degradation temperature of 700 °C maximized the competing reaction towards the formation of targeted aromatic hydrocarbons at the expense of phenolic products. Catalyst type also played a vital role in the catalytic decomposition of PC wastes, and HZSM-5 with different Si/Al molar ratios produced more aromatic hydrocarbons than HY (Zeolite Y, hydrogen, Faujasite). Regarding the effect of Si/Al molar ration in HZSM-5 on the distribution of monocyclic aromatic hydrocarbons (MAHs), a Si/Al molar ratio of 38 maximized benzene formation with an advanced factor of 5.1. Catalytic fast co-pyrolysis of PC with hydrogen-rich plastic wastes including polypropylene (PP), polyethylene (PE), and polystyrene (PS) favored the production of MAHs, and PS was the most effective hydrogen donor with a ~2.5-fold increase. The additive effect of MAHs increased at first and then decreased when the PC percentage was elevated from 30 % to 90 %, achieving the maximum value of 32.4 % at 70 % PC.},
doi = {10.1016/j.jhazmat.2019.121970},
journal = {Journal of Hazardous Materials},
number = 1,
volume = 386,
place = {United States},
year = {2019},
month = {12}
}

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