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Title: Catalytic conversion of rubber wastes to produce aromatic hydrocarbons over USY zeolites: Effect of SiO2/Al2O3 mole ratio

Abstract

Catalytic conversion of rubber wastes to produce an alternative fuel resource is a promising approach to dispose of solid wastes and address environmental issues. In this study, catalytic fast pyrolysis (CFP) of rubber wastes over acidic zeolites was conducted, and the effect of SiO2/Al2O3 mole ratio of USY zeolites on the formation of aromatic hydrocarbons was explored. Experimental results indicated that alkenes and aromatic hydrocarbons were the main pyrolytic products obtained from fast pyrolysis of rubber wastes, and the pyrolysis temperature played a vital role in the formation of aromatics with the highest concentration achieved at 750 °C. Furthermore, catalyst types also affected the catalytic degradation of rubber wastes since limonene was completely decomposed in the presence of zeolites. Compared to SAPO-34, zeolites with higher external surface area, stronger Brønsted acid sites, and larger pore size, including USY, HY, and Hβ, were more effective in the production of aromatic hydrocarbons with the highest content obtained from USY catalyzed run. Given the observed effect of SiO2/Al2O3 mole ratio of USY zeolites on the formation of aromatic hydrocarbons during the CFP of rubber wastes, USY with low SiO2/Al2O3 ratio of 5.3 was more beneficial to the generation of aromatic hydrocarbons, while thatmore » with higher SiO2/Al2O3 mole ratio (11.5) facilitated the formation of alkenes. Simultaneously, the product distribution of aromatic hydrocarbons obtained from CFP of rubber wastes over USY zeolites was dominated by xylenes, alkylbenzenes, and toluene, and USY with SiO2/Al2O3 mole ratio of 5.3 was more active in the production of toluene and xylenes.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [4];  [6];  [7]; ORCiD logo [4]; ORCiD logo [8]
+ Show Author Affiliations
  1. Nanjing Forestry Univ., Jiangsu (China); Chinese Academy of Forestry (CAF), Nanjing (China); Southeast Univ., Jiangsu (China); The Univ. of Tennessee, Knoxville, TN (United States)
  2. Nanjing Forestry Univ., Jiangsu (China); Chinese Academy of Forestry (CAF), Nanjing (China)
  3. Nanjing Xiaozhuang Univ., Nanjing (China); Cardiff Univ., Cardiff (United Kingdom)
  4. Chinese Academy of Forestry (CAF), Nanjing (China); Nanjing Forestry Univ., Nanjing (China)
  5. Dongguan Baida New Energy Co., Ltd., Guangdong (China)
  6. The Univ. of Tennessee, Knoxville, TN (United States)
  7. Southeast Univ., Jiangsu (China)
  8. The Univ. of Tennessee, Knoxville, TN (United States); The Univ. of Tennessee Inst. of Agriculture, 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:
1558487
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Energy Conversion and Management
Additional Journal Information:
Journal Volume: 197; Journal Issue: C; Journal ID: ISSN 0196-8904
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; Rubber wastes; USY zeolites; SiO2/Al2O3 mole ratio; Catalytic fast pyrolysis; Aromatic hydrocarbons

Citation Formats

Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Liu, Peng, Li, Jing, Liu, Guanghua, Wang, Kui, Li, Mi, Zhong, Zhaoping, Xu, Junming, and Ragauskas, Arthur J. Catalytic conversion of rubber wastes to produce aromatic hydrocarbons over USY zeolites: Effect of SiO2/Al2O3 mole ratio. United States: N. p., 2019. Web. doi:10.1016/j.enconman.2019.111857.
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Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Liu, Peng, Li, Jing, Liu, Guanghua, Wang, Kui, Li, Mi, Zhong, Zhaoping, Xu, Junming, & Ragauskas, Arthur J. Catalytic conversion of rubber wastes to produce aromatic hydrocarbons over USY zeolites: Effect of SiO2/Al2O3 mole ratio. United States. https://doi.org/10.1016/j.enconman.2019.111857
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Wang, Jia, Jiang, Jianchun, Wang, Xiaobo, Liu, Peng, Li, Jing, Liu, Guanghua, Wang, Kui, Li, Mi, Zhong, Zhaoping, Xu, Junming, and Ragauskas, Arthur J. Wed . "Catalytic conversion of rubber wastes to produce aromatic hydrocarbons over USY zeolites: Effect of SiO2/Al2O3 mole ratio". United States. https://doi.org/10.1016/j.enconman.2019.111857. https://www.osti.gov/servlets/purl/1558487.
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@article{osti_1558487,
title = {Catalytic conversion of rubber wastes to produce aromatic hydrocarbons over USY zeolites: Effect of SiO2/Al2O3 mole ratio},
author = {Wang, Jia and Jiang, Jianchun and Wang, Xiaobo and Liu, Peng and Li, Jing and Liu, Guanghua and Wang, Kui and Li, Mi and Zhong, Zhaoping and Xu, Junming and Ragauskas, Arthur J.},
abstractNote = {Catalytic conversion of rubber wastes to produce an alternative fuel resource is a promising approach to dispose of solid wastes and address environmental issues. In this study, catalytic fast pyrolysis (CFP) of rubber wastes over acidic zeolites was conducted, and the effect of SiO2/Al2O3 mole ratio of USY zeolites on the formation of aromatic hydrocarbons was explored. Experimental results indicated that alkenes and aromatic hydrocarbons were the main pyrolytic products obtained from fast pyrolysis of rubber wastes, and the pyrolysis temperature played a vital role in the formation of aromatics with the highest concentration achieved at 750 °C. Furthermore, catalyst types also affected the catalytic degradation of rubber wastes since limonene was completely decomposed in the presence of zeolites. Compared to SAPO-34, zeolites with higher external surface area, stronger Brønsted acid sites, and larger pore size, including USY, HY, and Hβ, were more effective in the production of aromatic hydrocarbons with the highest content obtained from USY catalyzed run. Given the observed effect of SiO2/Al2O3 mole ratio of USY zeolites on the formation of aromatic hydrocarbons during the CFP of rubber wastes, USY with low SiO2/Al2O3 ratio of 5.3 was more beneficial to the generation of aromatic hydrocarbons, while that with higher SiO2/Al2O3 mole ratio (11.5) facilitated the formation of alkenes. Simultaneously, the product distribution of aromatic hydrocarbons obtained from CFP of rubber wastes over USY zeolites was dominated by xylenes, alkylbenzenes, and toluene, and USY with SiO2/Al2O3 mole ratio of 5.3 was more active in the production of toluene and xylenes.},
doi = {10.1016/j.enconman.2019.111857},
journal = {Energy Conversion and Management},
number = C,
volume = 197,
place = {United States},
year = {Wed Aug 07 00:00:00 EDT 2019},
month = {Wed Aug 07 00:00:00 EDT 2019}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.enconman.2019.111857
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Cited by: 21 works
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Figures / Tables:

Table 1 Table 1: Elemental analysis of rubber wastes.
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Figures / Tables found in this record:

Table 1 (p. 6)table
Table 2 (p. 7)table
Fig. 1 (p. 11)figure
Fig. 2 (p. 11)figure
Fig. 3 (p. 12)figure
Scheme 1 (p. 12)figure
Scheme 2 (p. 12)figure
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Fig. 8 (p. 18)figure
Fig. 9 (p. 18)figure
Fig. 10 (p. 20)figure
Table 3 (p. 20)table
Fig. 11 (p. 23)figure
Fig. 12 (p. 23)figure
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