skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Improved Biomass Deacetylation and Deconstruction using a Continuous Counter-Current Reactor

Abstract

Deacetylation and Mechanical Refining (DMR) process is an emerging technology that successfully demonstrated the capability to produce high titer, higher yield, low toxicity sugar and tractable lignin streams at low temperature atmospheric pressure conditions. Previous work has been performed all in batch stirred tank reactors with the scale up to 100kg/day. In this work we have adapted a shaftless inclined screw reactor to perform counter current deacetylation. Continuous counter-current extraction is practiced at the industrial scale in pulping processes to recycle the black liquor at high pressures/temperatures, enabling effective mass and heat transfer to achieve high lignin removal and efficient water/energy usages. Counter-current process steps enable high concentrations of the target compounds to be extracted into the extraction solvent and result in low residual content of the target compound in the extracted residue to increase efficiency and downstream product yields, while keeping the equipment more compact and decreased footprint dimensions compared to batch stirred tank reactors. Preliminary results have shown improved sugar yield in enzymatic hydrolysis at low enzyme loadings for the continuous counter-current deacetylation/mechanical refining process compared to the currently used batch process, while xylan losses into the black liquor are reduced up to 2/3.

Authors:
 [1];  [1];  [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (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), Bioenergy Technologies Office (EE-3B)
OSTI Identifier:
1562874
Report Number(s):
NREL/PO-5100-74640
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 41st Symposium on Biotechnology for Fuels and Chemicals, 28 April - 1 May 2019, Seattle, Washington
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; continuous counter current; biorefinery; enzyme; enzymatic hydrolysis; deacetylation and mechanical Refining; DMR

Citation Formats

Chen, Xiaowen, Nagle, Nicholas J, Kuhn, Erik M, and Tucker, Melvin P. Improved Biomass Deacetylation and Deconstruction using a Continuous Counter-Current Reactor. United States: N. p., 2019. Web.
Chen, Xiaowen, Nagle, Nicholas J, Kuhn, Erik M, & Tucker, Melvin P. Improved Biomass Deacetylation and Deconstruction using a Continuous Counter-Current Reactor. United States.
Chen, Xiaowen, Nagle, Nicholas J, Kuhn, Erik M, and Tucker, Melvin P. Thu . "Improved Biomass Deacetylation and Deconstruction using a Continuous Counter-Current Reactor". United States. https://www.osti.gov/servlets/purl/1562874.
@article{osti_1562874,
title = {Improved Biomass Deacetylation and Deconstruction using a Continuous Counter-Current Reactor},
author = {Chen, Xiaowen and Nagle, Nicholas J and Kuhn, Erik M and Tucker, Melvin P},
abstractNote = {Deacetylation and Mechanical Refining (DMR) process is an emerging technology that successfully demonstrated the capability to produce high titer, higher yield, low toxicity sugar and tractable lignin streams at low temperature atmospheric pressure conditions. Previous work has been performed all in batch stirred tank reactors with the scale up to 100kg/day. In this work we have adapted a shaftless inclined screw reactor to perform counter current deacetylation. Continuous counter-current extraction is practiced at the industrial scale in pulping processes to recycle the black liquor at high pressures/temperatures, enabling effective mass and heat transfer to achieve high lignin removal and efficient water/energy usages. Counter-current process steps enable high concentrations of the target compounds to be extracted into the extraction solvent and result in low residual content of the target compound in the extracted residue to increase efficiency and downstream product yields, while keeping the equipment more compact and decreased footprint dimensions compared to batch stirred tank reactors. Preliminary results have shown improved sugar yield in enzymatic hydrolysis at low enzyme loadings for the continuous counter-current deacetylation/mechanical refining process compared to the currently used batch process, while xylan losses into the black liquor are reduced up to 2/3.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: