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Title: Novel Acid Catalysts from Waste-Tire-Derived Carbon: Application in Waste-to-Biofuel Conversion

Many inexpensive biofuel feedstocks, including those containing free fatty acids (FFAs) in high concentrations, are typically disposed of as waste due to our inability to efficiently convert them into usable biofuels. Here we demonstrate that carbon derived from waste tires could be functionalized with sulfonic acid (-SO 3H) to effectively catalyze the esterification of oleic acid or a mixture of fatty acids to usable biofuels. Waste tires were converted to hard carbon, then functionalized with catalytically active -SO 3H groups on the surface through an environmentally benign process that involved the sequential treatment with L-cysteine, dithiothreitol, and H 2O 2. In conclusion, when benchmarked against the same waste-tire derived carbon material treated with concentrated sulfuric acid at 150 °C, similar catalytic activity was observed. Both catalysts could also effectively convert oleic acid or a mixture of fatty acids and soybean oil to usable biofuels at 65 °C and 1 atm without leaching of the catalytic sites.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [2] ;  [2] ; ORCiD logo [3]
  1. Georgia Inst. of Technology, Atlanta, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Wake Forest Univ., Winston-Salem, NC (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee, Knoxville, TN (United States)
  4. Georgia Inst. of Technology, Atlanta, GA (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Chemistry Select
Additional Journal Information:
Journal Volume: 2; Journal Issue: 18; Journal ID: ISSN 2365-6549
Publisher:
Wiley
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; biofuel conversion; carbon catalysts; recycled tires; free fatty acids; esterification
OSTI Identifier:
1376323
Alternate Identifier(s):
OSTI ID: 1373956

Hood, Zachary D., Adhikari, Shiba P., Li, Yunchao, Naskar, Amit K., Figueroa-Cosme, Legna, Xia, Younan, Chi, Miaofang, Wright, Marcus W., Lachgar, Abdou, and Paranthaman, M. Parans. Novel Acid Catalysts from Waste-Tire-Derived Carbon: Application in Waste-to-Biofuel Conversion. United States: N. p., Web. doi:10.1002/slct.201700869.
Hood, Zachary D., Adhikari, Shiba P., Li, Yunchao, Naskar, Amit K., Figueroa-Cosme, Legna, Xia, Younan, Chi, Miaofang, Wright, Marcus W., Lachgar, Abdou, & Paranthaman, M. Parans. Novel Acid Catalysts from Waste-Tire-Derived Carbon: Application in Waste-to-Biofuel Conversion. United States. doi:10.1002/slct.201700869.
Hood, Zachary D., Adhikari, Shiba P., Li, Yunchao, Naskar, Amit K., Figueroa-Cosme, Legna, Xia, Younan, Chi, Miaofang, Wright, Marcus W., Lachgar, Abdou, and Paranthaman, M. Parans. 2017. "Novel Acid Catalysts from Waste-Tire-Derived Carbon: Application in Waste-to-Biofuel Conversion". United States. doi:10.1002/slct.201700869. https://www.osti.gov/servlets/purl/1376323.
@article{osti_1376323,
title = {Novel Acid Catalysts from Waste-Tire-Derived Carbon: Application in Waste-to-Biofuel Conversion},
author = {Hood, Zachary D. and Adhikari, Shiba P. and Li, Yunchao and Naskar, Amit K. and Figueroa-Cosme, Legna and Xia, Younan and Chi, Miaofang and Wright, Marcus W. and Lachgar, Abdou and Paranthaman, M. Parans},
abstractNote = {Many inexpensive biofuel feedstocks, including those containing free fatty acids (FFAs) in high concentrations, are typically disposed of as waste due to our inability to efficiently convert them into usable biofuels. Here we demonstrate that carbon derived from waste tires could be functionalized with sulfonic acid (-SO3H) to effectively catalyze the esterification of oleic acid or a mixture of fatty acids to usable biofuels. Waste tires were converted to hard carbon, then functionalized with catalytically active -SO3H groups on the surface through an environmentally benign process that involved the sequential treatment with L-cysteine, dithiothreitol, and H2O2. In conclusion, when benchmarked against the same waste-tire derived carbon material treated with concentrated sulfuric acid at 150 °C, similar catalytic activity was observed. Both catalysts could also effectively convert oleic acid or a mixture of fatty acids and soybean oil to usable biofuels at 65 °C and 1 atm without leaching of the catalytic sites.},
doi = {10.1002/slct.201700869},
journal = {Chemistry Select},
number = 18,
volume = 2,
place = {United States},
year = {2017},
month = {6}
}

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