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

Title: Development of a geothermally assisted process for the production of liquid fuels and chemicals from pinewood. Executive summary of Final report

Abstract

The primary goal of the work discussed in this report was to investigate the extent to which pinewood could be converted to fermentable sugars using geothermal hot water to enhance conversion of lignocellulosic biomass to ethanol. The delignification process is a synthesis of two recently developed pulping processes. In the first step, called autohydrolysis, hot water is used directly to solubilize hemicellulose and to depolymerize lignin. Then, in a second step known as organosolv pulping, the autohydrolyzed material is extracted with aqueous alcohol. The autohydrolysis conditions that permitted the maximum recovery of the sugars produced by the chemical hydrolysis of the hemicellulosic component were determined. Next, using material subjected to autohydrolysis under these conditions, we made a thorough study of the effects of variations in the organosolv extraction procedure on the yield of sugar in the subsequent enzymatic hydrolysis of the cellulosic component. In this work, we were guided by a desire to maximize the yield of sugar and to minimize the use of solvent. The latter constraint arose due to the cost that would be involved in reconcentrating (by distillation) large amounts of diluted aqueous alcohol. Once optimal (or near optimal) pretreatment conditions were determined, we made a studymore » of the effects of two major parameters, substrate concentration and enzyme/substrate ratio, on the sugar yield from enzymatic hydrolysis of optimally pretreated wood. In related experiments we characterized the efficiency with which these sugars could be fermented to ethanol. 14 references, 8 figures, 4 tables.« less

Authors:
;
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins (USA). Dept. of Agricultural and Chemical Engineering
OSTI Identifier:
7065601
Report Number(s):
DOE/ID/12051-T3
ON: DE84014793
DOE Contract Number:  
AS07-79ID12051
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 15 GEOTHERMAL ENERGY; WOOD; ENZYMATIC HYDROLYSIS; HEAT TREATMENTS; SOLVENT EXTRACTION; ETHANOL; GEOTHERMAL ENERGY; GLUCOSE; LIGNIN; ORGANIC SOLVENTS; PINES; PROCESS HEAT; PRODUCTION; RECOVERY; RECYCLING; ALCOHOLS; ALDEHYDES; CARBOHYDRATES; CHEMICAL REACTIONS; CONIFERS; DECOMPOSITION; ENERGY; ENERGY SOURCES; EXTRACTION; HEAT; HEXOSES; HYDROLYSIS; HYDROXY COMPOUNDS; LYSIS; MONOSACCHARIDES; ORGANIC COMPOUNDS; PLANTS; POLYSACCHARIDES; RENEWABLE ENERGY SOURCES; SACCHARIDES; SEPARATION PROCESSES; SOLVENTS; SOLVOLYSIS; TREES; 090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989); 140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989); 151000 - Geothermal Energy- Direct Energy Utilization

Citation Formats

Murphy, V G, and Linden, J C. Development of a geothermally assisted process for the production of liquid fuels and chemicals from pinewood. Executive summary of Final report. United States: N. p., 1983. Web.
Murphy, V G, & Linden, J C. Development of a geothermally assisted process for the production of liquid fuels and chemicals from pinewood. Executive summary of Final report. United States.
Murphy, V G, and Linden, J C. 1983. "Development of a geothermally assisted process for the production of liquid fuels and chemicals from pinewood. Executive summary of Final report". United States.
@article{osti_7065601,
title = {Development of a geothermally assisted process for the production of liquid fuels and chemicals from pinewood. Executive summary of Final report},
author = {Murphy, V G and Linden, J C},
abstractNote = {The primary goal of the work discussed in this report was to investigate the extent to which pinewood could be converted to fermentable sugars using geothermal hot water to enhance conversion of lignocellulosic biomass to ethanol. The delignification process is a synthesis of two recently developed pulping processes. In the first step, called autohydrolysis, hot water is used directly to solubilize hemicellulose and to depolymerize lignin. Then, in a second step known as organosolv pulping, the autohydrolyzed material is extracted with aqueous alcohol. The autohydrolysis conditions that permitted the maximum recovery of the sugars produced by the chemical hydrolysis of the hemicellulosic component were determined. Next, using material subjected to autohydrolysis under these conditions, we made a thorough study of the effects of variations in the organosolv extraction procedure on the yield of sugar in the subsequent enzymatic hydrolysis of the cellulosic component. In this work, we were guided by a desire to maximize the yield of sugar and to minimize the use of solvent. The latter constraint arose due to the cost that would be involved in reconcentrating (by distillation) large amounts of diluted aqueous alcohol. Once optimal (or near optimal) pretreatment conditions were determined, we made a study of the effects of two major parameters, substrate concentration and enzyme/substrate ratio, on the sugar yield from enzymatic hydrolysis of optimally pretreated wood. In related experiments we characterized the efficiency with which these sugars could be fermented to ethanol. 14 references, 8 figures, 4 tables.},
doi = {},
url = {https://www.osti.gov/biblio/7065601}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: