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Title: Steam gasification of a thermally pretreated high lignin corn stover simultaneous saccharification and fermentation digester residue

Abstract

Efficient conversion of all components in lignocellulosic biomass is essential to realizing economic feasibility of biorefineries. However, when utilizing biochemical pathways, lignin cannot be fermented. Furthermore, the high lignin and high ash residue resulting from simultaneous saccharification and fermentation (SSF) reactors is difficult to thermochemically process due to feed line plugging and bed agglomeration. In this study a corn stover SSF digester residue was thermally pretreated at 300°C for 22.5 minutes (min) and then gasified in a bubbling fluidized bed gasifier to study the effect of thermal pretreatment on its processing behavior. Untreated, pelletized SSF residue was gasified at the same conditions to establish the baseline processing behavior. Results indicate that the thermal pretreatment process removes a substantial portion of the polar and non-polar extractives, with a resultant increase in the concentration of lignin, cellulose, and ash. Feed line plugging was not observed, although bed agglomeration was occurring at similar rates for both feedstocks, suggesting that overall ash content is the most important factor affecting bed agglomeration. Benzene, phenol, and polyaromatic hydrocarbons in the tar were present at higher concentrations in the treated material, with higher tar loading in the product gas. Total product gas generation is lower for themore » treated material, although the overall gas composition does not change.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1344034
Report Number(s):
PNNL-SA-118700
Journal ID: ISSN 0360-5442; BM0101010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy (Oxford); Journal Volume: 119; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Simultaneous saccharification and fermentation digester residue; thermochemical conversions; gasification; lignin; integrated biorefinery; renewable energy; biofuels; bioenergy

Citation Formats

Howe, Daniel T., Taasevigen, Danny, Garcia-Perez, Manuel, McDonald, Armando G., Li, Guosheng, and Wolcott, Michael. Steam gasification of a thermally pretreated high lignin corn stover simultaneous saccharification and fermentation digester residue. United States: N. p., 2017. Web. doi:10.1016/j.energy.2016.12.094.
Howe, Daniel T., Taasevigen, Danny, Garcia-Perez, Manuel, McDonald, Armando G., Li, Guosheng, & Wolcott, Michael. Steam gasification of a thermally pretreated high lignin corn stover simultaneous saccharification and fermentation digester residue. United States. doi:10.1016/j.energy.2016.12.094.
Howe, Daniel T., Taasevigen, Danny, Garcia-Perez, Manuel, McDonald, Armando G., Li, Guosheng, and Wolcott, Michael. Sun . "Steam gasification of a thermally pretreated high lignin corn stover simultaneous saccharification and fermentation digester residue". United States. doi:10.1016/j.energy.2016.12.094.
@article{osti_1344034,
title = {Steam gasification of a thermally pretreated high lignin corn stover simultaneous saccharification and fermentation digester residue},
author = {Howe, Daniel T. and Taasevigen, Danny and Garcia-Perez, Manuel and McDonald, Armando G. and Li, Guosheng and Wolcott, Michael},
abstractNote = {Efficient conversion of all components in lignocellulosic biomass is essential to realizing economic feasibility of biorefineries. However, when utilizing biochemical pathways, lignin cannot be fermented. Furthermore, the high lignin and high ash residue resulting from simultaneous saccharification and fermentation (SSF) reactors is difficult to thermochemically process due to feed line plugging and bed agglomeration. In this study a corn stover SSF digester residue was thermally pretreated at 300°C for 22.5 minutes (min) and then gasified in a bubbling fluidized bed gasifier to study the effect of thermal pretreatment on its processing behavior. Untreated, pelletized SSF residue was gasified at the same conditions to establish the baseline processing behavior. Results indicate that the thermal pretreatment process removes a substantial portion of the polar and non-polar extractives, with a resultant increase in the concentration of lignin, cellulose, and ash. Feed line plugging was not observed, although bed agglomeration was occurring at similar rates for both feedstocks, suggesting that overall ash content is the most important factor affecting bed agglomeration. Benzene, phenol, and polyaromatic hydrocarbons in the tar were present at higher concentrations in the treated material, with higher tar loading in the product gas. Total product gas generation is lower for the treated material, although the overall gas composition does not change.},
doi = {10.1016/j.energy.2016.12.094},
journal = {Energy (Oxford)},
number = C,
volume = 119,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}