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Title: The effect of continuous tubular reactor technologies on the pretreatment of lignocellulosic biomass at pilot-scale for bioethanol production

Abstract

A pilot-scale continuous tubular reactor (PCTR) was employed for the isothermal pretreatment of agave bagasse (AG), corn stover (CS), sugarcane bagasse (SC), and wheat straw (WS) with three residence times. The objective was to evaluate the impact of this technology on enzymatic saccharification at low solid loadings (4% w/v) and on sequential saccharification and glucose fermentation (SSF) at high solid loading (20% w/v) for bioethanol production. Deformation in cellulose and hemicellulose linkages and xylan removal of up to 60% were achieved after pretreatment. The shortest residence time tested (20 min) resulted in the highest glucan to glucose conversion in the low solid loading (4% w/v) enzymatic saccharification step for AG (83.3%), WS (82.8%), CS (76.1%) and SC (51.8%). Final ethanol concentrations after SSF from PCTR-pretreated biomass were in the range of 38 to 42 g L–1 (11.0–11.3 kg of ethanol per 100 kg of untreated biomass). Additionally, PCTR performance in terms of xylan removal and sugar release were compared with those from a batch lab-scale autohydrolysis reactor (BLR) under the same process conditions. BLR removed higher xylan amounts than those achieved in the PCTR. However, higher sugar concentrations were obtained with PCTR for SC (13.2 g L–1 vs. 10.5 gmore » L–1) and WS (21.7 g L–1 vs. 18.8 g L–1), whilst differences were not significant (p < 0.05) with BLR for AG (16.0 g L–1 vs. 16.3 g L–1) and CS (18.7 g L–1 vs. 18.4 g L–1).« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Laboratorio de Futuros en Bioenergía, Unidad Guadalajara de Ingeniería Avanzada, Centro de Investigación y Estudios Avanzados (CINVESTAV), Zapopan, Mexico
  2. Joint BioEnergy Institute, Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Emeryville, USA
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); Mexican Secretary of Energy
OSTI Identifier:
1618185
Alternate Identifier(s):
OSTI ID: 1760249
Grant/Contract Number:  
AC02-05CH11231; 249564
Resource Type:
Published Article
Journal Name:
RSC Advances
Additional Journal Information:
Journal Name: RSC Advances Journal Volume: 10 Journal Issue: 31; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United Kingdom
Language:
English
Subject:
09 BIOMASS FUELS

Citation Formats

Pérez-Pimienta, José A., Papa, Gabriela, Gladden, John M., Simmons, Blake A., and Sanchez, Arturo. The effect of continuous tubular reactor technologies on the pretreatment of lignocellulosic biomass at pilot-scale for bioethanol production. United Kingdom: N. p., 2020. Web. https://doi.org/10.1039/D0RA04031B.
Pérez-Pimienta, José A., Papa, Gabriela, Gladden, John M., Simmons, Blake A., & Sanchez, Arturo. The effect of continuous tubular reactor technologies on the pretreatment of lignocellulosic biomass at pilot-scale for bioethanol production. United Kingdom. https://doi.org/10.1039/D0RA04031B
Pérez-Pimienta, José A., Papa, Gabriela, Gladden, John M., Simmons, Blake A., and Sanchez, Arturo. Tue . "The effect of continuous tubular reactor technologies on the pretreatment of lignocellulosic biomass at pilot-scale for bioethanol production". United Kingdom. https://doi.org/10.1039/D0RA04031B.
@article{osti_1618185,
title = {The effect of continuous tubular reactor technologies on the pretreatment of lignocellulosic biomass at pilot-scale for bioethanol production},
author = {Pérez-Pimienta, José A. and Papa, Gabriela and Gladden, John M. and Simmons, Blake A. and Sanchez, Arturo},
abstractNote = {A pilot-scale continuous tubular reactor (PCTR) was employed for the isothermal pretreatment of agave bagasse (AG), corn stover (CS), sugarcane bagasse (SC), and wheat straw (WS) with three residence times. The objective was to evaluate the impact of this technology on enzymatic saccharification at low solid loadings (4% w/v) and on sequential saccharification and glucose fermentation (SSF) at high solid loading (20% w/v) for bioethanol production. Deformation in cellulose and hemicellulose linkages and xylan removal of up to 60% were achieved after pretreatment. The shortest residence time tested (20 min) resulted in the highest glucan to glucose conversion in the low solid loading (4% w/v) enzymatic saccharification step for AG (83.3%), WS (82.8%), CS (76.1%) and SC (51.8%). Final ethanol concentrations after SSF from PCTR-pretreated biomass were in the range of 38 to 42 g L–1 (11.0–11.3 kg of ethanol per 100 kg of untreated biomass). Additionally, PCTR performance in terms of xylan removal and sugar release were compared with those from a batch lab-scale autohydrolysis reactor (BLR) under the same process conditions. BLR removed higher xylan amounts than those achieved in the PCTR. However, higher sugar concentrations were obtained with PCTR for SC (13.2 g L–1 vs. 10.5 g L–1) and WS (21.7 g L–1 vs. 18.8 g L–1), whilst differences were not significant (p < 0.05) with BLR for AG (16.0 g L–1 vs. 16.3 g L–1) and CS (18.7 g L–1 vs. 18.4 g L–1).},
doi = {10.1039/D0RA04031B},
journal = {RSC Advances},
number = 31,
volume = 10,
place = {United Kingdom},
year = {2020},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1039/D0RA04031B

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