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Title: Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties

Abstract

Here, novel and sustainable pretreatment approaches are desired to improve the techno-commercial feasibility of biorefineries in the future. In this study, 10 renewable deep eutectic solvents (DESs) were evaluated for their pretreatment efficiency at facile conditions with sugar cane bagasse as substrate and compared with conventional pretreatment approaches (dilute alkali, dilute acid, and ionic liquid (IL)) for lignin removal, saccharification yield, cellulose accessibility, crystallinity, and physiochemical properties. Although, the highest delignification was obtained with dilute alkali (59.7%) and choline chloride:lactic acid or ChCl:LA (50.6%), the maximum enzymatic conversion of 98.0% and 90.4% was observed with IL (1-butyl-3-methylimidazolium acetate) and ChCl:LA, respectively. uclear magnetic resonance analysis of ChCl:LA-derived lignin showed selective removal of guaiacyl lignin without condensation structure formation observed. Interestingly, unlike IL, the lignin was substantially depolymerized after ChCl:LA pretreatment as determined by gel permeation chromatography. Further, high compatibility of ChCl:LA with cellulase in comparison of IL with easy recyclability and recycling showed that DESs synthesized from a renewable resource are promising “green” solvents for future biorefinery operations.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [4];  [5];  [5]; ORCiD logo [6]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Indian Oil Corporation Limited, Faridabad (India)
  2. Univ. of Tennessee, Knoxville, TN (United States); Indian Oil Corporation Limited, Faridabad (India)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Indian Oil Corporation Limited, Faridabad (India)
  6. 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 Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1489103
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; deep eutectic solvents; ionic liquid; lignin; pretreatment; sugar cane bagasse

Citation Formats

Satlewal, Alok, Agrawal, Ruchi, Das, Parthapratim, Bhagia, Samarthya, Pu, Yunqiao, Puri, Suresh Kumar, Ramakumar, S. S. V., and Ragauskas, Arthur J. Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties. United States: N. p., 2018. Web. doi:10.1021/acssuschemeng.8b04773.
Satlewal, Alok, Agrawal, Ruchi, Das, Parthapratim, Bhagia, Samarthya, Pu, Yunqiao, Puri, Suresh Kumar, Ramakumar, S. S. V., & Ragauskas, Arthur J. Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties. United States. https://doi.org/10.1021/acssuschemeng.8b04773
Satlewal, Alok, Agrawal, Ruchi, Das, Parthapratim, Bhagia, Samarthya, Pu, Yunqiao, Puri, Suresh Kumar, Ramakumar, S. S. V., and Ragauskas, Arthur J. Fri . "Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties". United States. https://doi.org/10.1021/acssuschemeng.8b04773. https://www.osti.gov/servlets/purl/1489103.
@article{osti_1489103,
title = {Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties},
author = {Satlewal, Alok and Agrawal, Ruchi and Das, Parthapratim and Bhagia, Samarthya and Pu, Yunqiao and Puri, Suresh Kumar and Ramakumar, S. S. V. and Ragauskas, Arthur J.},
abstractNote = {Here, novel and sustainable pretreatment approaches are desired to improve the techno-commercial feasibility of biorefineries in the future. In this study, 10 renewable deep eutectic solvents (DESs) were evaluated for their pretreatment efficiency at facile conditions with sugar cane bagasse as substrate and compared with conventional pretreatment approaches (dilute alkali, dilute acid, and ionic liquid (IL)) for lignin removal, saccharification yield, cellulose accessibility, crystallinity, and physiochemical properties. Although, the highest delignification was obtained with dilute alkali (59.7%) and choline chloride:lactic acid or ChCl:LA (50.6%), the maximum enzymatic conversion of 98.0% and 90.4% was observed with IL (1-butyl-3-methylimidazolium acetate) and ChCl:LA, respectively. uclear magnetic resonance analysis of ChCl:LA-derived lignin showed selective removal of guaiacyl lignin without condensation structure formation observed. Interestingly, unlike IL, the lignin was substantially depolymerized after ChCl:LA pretreatment as determined by gel permeation chromatography. Further, high compatibility of ChCl:LA with cellulase in comparison of IL with easy recyclability and recycling showed that DESs synthesized from a renewable resource are promising “green” solvents for future biorefinery operations.},
doi = {10.1021/acssuschemeng.8b04773},
journal = {ACS Sustainable Chemistry & Engineering},
number = 1,
volume = 7,
place = {United States},
year = {Fri Nov 09 00:00:00 EST 2018},
month = {Fri Nov 09 00:00:00 EST 2018}
}

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