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Title: Chemical and Structural Effects on the Rate of Xylan Hydrolysis during Dilute Acid Pretreatment of Poplar Wood

Abstract

Economic biofuel production requires high sugar yields during biomass pretreatment, however, the chemical and structural features of biomass can be obstructive toward efficient xylose hydrolysis. Here, we tested the hindrance imposed by the multiscale structure of biomass on the hydrolysis of xylan during dilute acid pretreatment by studying the effects of both the chemical nature of xylan and physical structure of biomass. Dilute acid pretreatment of poplar wood at particle sizes ranging from 10 um to 10 mm was conducted, however, no significant differences in the rates of xylan hydrolysis were observed over more than 2 orders of magnitude in particle size. A significant reduction in the rate of xylan hydrolysis was observed when compared to the intrinsic rate of hydrolysis for isolated xylan. Thus, it appears likely that the chemical structure of xylan and/or the interaction of xylan with other polymers in the cell wall matrix have greater effects on xylan hydrolysis rates than mass transfer limitations.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. State Univ. of New York (SUNY), Syracuse, NY (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1500071
Report Number(s):
NREL/JA-2700-72306
Journal ID: ISSN 2168-0485
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; kinetics; mass transfer; particle size; pretreatment; transmission electron microscopy; xylan

Citation Formats

Mittal, Ashutosh, Pilath, Heidi M., Parent, Yves, Chatterjee, Siddharth G., Donohoe, Bryon S., Yarbrough, John M., Black, Stuart K., Himmel, Michael E., Nimlos, Mark R., and Johnson, David K.. Chemical and Structural Effects on the Rate of Xylan Hydrolysis during Dilute Acid Pretreatment of Poplar Wood. United States: N. p., 2019. Web. doi:10.1021/acssuschemeng.8b05248.
Mittal, Ashutosh, Pilath, Heidi M., Parent, Yves, Chatterjee, Siddharth G., Donohoe, Bryon S., Yarbrough, John M., Black, Stuart K., Himmel, Michael E., Nimlos, Mark R., & Johnson, David K.. Chemical and Structural Effects on the Rate of Xylan Hydrolysis during Dilute Acid Pretreatment of Poplar Wood. United States. doi:10.1021/acssuschemeng.8b05248.
Mittal, Ashutosh, Pilath, Heidi M., Parent, Yves, Chatterjee, Siddharth G., Donohoe, Bryon S., Yarbrough, John M., Black, Stuart K., Himmel, Michael E., Nimlos, Mark R., and Johnson, David K.. Wed . "Chemical and Structural Effects on the Rate of Xylan Hydrolysis during Dilute Acid Pretreatment of Poplar Wood". United States. doi:10.1021/acssuschemeng.8b05248.
@article{osti_1500071,
title = {Chemical and Structural Effects on the Rate of Xylan Hydrolysis during Dilute Acid Pretreatment of Poplar Wood},
author = {Mittal, Ashutosh and Pilath, Heidi M. and Parent, Yves and Chatterjee, Siddharth G. and Donohoe, Bryon S. and Yarbrough, John M. and Black, Stuart K. and Himmel, Michael E. and Nimlos, Mark R. and Johnson, David K.},
abstractNote = {Economic biofuel production requires high sugar yields during biomass pretreatment, however, the chemical and structural features of biomass can be obstructive toward efficient xylose hydrolysis. Here, we tested the hindrance imposed by the multiscale structure of biomass on the hydrolysis of xylan during dilute acid pretreatment by studying the effects of both the chemical nature of xylan and physical structure of biomass. Dilute acid pretreatment of poplar wood at particle sizes ranging from 10 um to 10 mm was conducted, however, no significant differences in the rates of xylan hydrolysis were observed over more than 2 orders of magnitude in particle size. A significant reduction in the rate of xylan hydrolysis was observed when compared to the intrinsic rate of hydrolysis for isolated xylan. Thus, it appears likely that the chemical structure of xylan and/or the interaction of xylan with other polymers in the cell wall matrix have greater effects on xylan hydrolysis rates than mass transfer limitations.},
doi = {10.1021/acssuschemeng.8b05248},
journal = {ACS Sustainable Chemistry & Engineering},
number = 5,
volume = 7,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 6, 2020
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