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This content will become publicly available on May 18, 2018

Title: Cellulosic ethanol: status and innovation

Although the purchase price of cellulosic feedstocks is competitive with petroleum on an energy basis, the cost of lignocellulose conversion to ethanol using today's technology is high. Cost reductions can be pursued via either in-paradigm or new-paradigm innovation. Here, as an example of new-paradigm innovation, consolidated bioprocessing using thermophilic bacteria combined with milling during fermentation (cotreatment) is analyzed. Acknowledging the nascent state of this approach, our analysis indicates potential for radically improved cost competitiveness and feasibility at smaller scale compared to current technology, arising from (a) R&D-driven advances (consolidated bioprocessing with cotreatment in lieu of thermochemical pretreatment and added fungal cellulase), and (b) configurational changes (fuel pellet coproduction instead of electricity, gas boiler(s) in lieu of a solid fuel boiler).
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [2] ;  [2] ;  [1] ;  [3] ;  [4]
  1. Dartmouth College, Hanover, NH (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Univ. of California, Riverside, CA (United States)
Publication Date:
Report Number(s):
NREL/JA-5100-68702
Journal ID: ISSN 0958-1669
Grant/Contract Number:
AC36-08GO28308; AC05-00OR22725; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Current Opinion in Biotechnology
Additional Journal Information:
Journal Volume: 45; Journal Issue: C; Journal ID: ISSN 0958-1669
Publisher:
Elsevier
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; cellulosic feedstocks; conversion; bioprocessing; fermentation
OSTI Identifier:
1364156
Alternate Identifier(s):
OSTI ID: 1416774