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Title Economics of enzymatic hydrolysis processes
Creator/Author Wright, J.D.
Publication Date1988 Feb 01
OSTI IdentifierOSTI ID: 5457268; DE88001134
Report Number(s)SERI/TP-231-3310;CONF-880348-2
DOE Contract NumberAC02-83CH10093
Resource TypeConference
Specific TypeTechnical Report
Resource RelationAmerican Institute of Chemical Engineers spring national meeting; 6 Mar 1988; New Orleans, LA, USA; Portions of this document are illegible in microfiche products
Research OrgSolar Energy Research Inst., Golden, CO (USA)
Subject090222 -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989) ;140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989); BIOMASS-- ENZYMATIC HYDROLYSIS;CELLULASE-- PRODUCTION;ETHANOL-- PRODUCTION;GLYCOSYL HYDROLASES-- PRODUCTION;LIGNIN-- ENZYMATIC HYDROLYSIS; ACID HYDROLYSIS;ECONOMIC ANALYSIS;ETHERS;EXPERIMENTAL DATA;FERMENTATION;SACCHARIFICATION;TECHNOLOGY ASSESSMENT;XYLANASE;XYLOSE
Related SubjectALCOHOLS;ALDEHYDES;BIOCONVERSION;CARBOHYDRATES;CHEMICAL REACTIONS;DATA;DECOMPOSITION;ECONOMICS;ENERGY SOURCES;ENZYMES;GLYCOSYL HYDROLASES;HYDROLASES;HYDROLYSIS;HYDROXY COMPOUNDS;INFORMATION;LYSIS;MONOSACCHARIDES;NUMERICAL DATA;O-GLYCOSYL HYDROLASES;ORGANIC COMPOUNDS;ORGANIC OXYGEN COMPOUNDS;PENTOSES;POLYSACCHARIDES;RENEWABLE ENERGY SOURCES;SACCHARIDES;SOLVOLYSIS
Description/Abstract Enzymatic hydrolysis processes have the ability to produce high yields of sugars for fermentation to fuel ethanol from lignocellulosic biomass.^However, these systems have been plagued with yields, product concentrations, and reactions rates far below those that are theoretically possible.^Engineering and economic analyses are presented on several fungal enzyme hydrolysis processes to illustrate the effects of the important process parameters, to quantify the progress that has been made to date, and to estimate the cost reductions that can be made through research improvements.^All enzymatic hydrolysis processes require pretreatment, hydrolysis, fermentation, and enzyme production.^The key effect of pretreatment is to allow access of the enzymes to the substrate.^Pretreatments have been devised that make the biomass completely digestible that increase the xylose yield and concentration, and that integrate pretreatment with lignin utilization.^Major improvements in enzyme activity and use of simultaneous saccharification and fermentation (SSF) have greatly reduced the inhibition of the enzymes.^It now appears that ethanol inhibition of the yeast is the limiting factor.^Enzyme production costs have been dramatically reduced because use of SSF has reduced enzyme loading.^However, further improvements may be possible by using soluble carbon sources for production.^Over the past decade, the predicted cost of ethanol from such processes has dropped from more than $4.00/gallon to approximately $1.60.^Research is currently under way in the United States and has the potential to reduce the projected cost to less than $1.00/gallon.^65 refs., 16 figs., 1 tab.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 48
AvailabilityNTIS, PC A03/MF A01; 1.
System Entry Date2001 May 13

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