Techno-economic comparison of centralized versus decentralized biorefineries for two alkaline pretreatment processes

Ryan J. Stoklosa, Andrea del Pilar Orjuela, Leonardo da Costa Sousa, Nirmal Uppugundla, Daniel L. Williams, Bruce E. Dale, David B. Hodge, Venkatesh Balan

Research output: Contribution to journalArticle

  • 6 Citations

Abstract

In this work, corn stover subjected to ammonia fiber expansion (AFEX™)AFEX™, is a trademark of MBI International. Pretreatment or alkaline pre-extraction followed by hydrogen peroxide post-treatment (AHP pretreatment) were compared for their enzymatic hydrolysis yields over a range of solids loadings, enzymes loadings, and enzyme combinations. Process techno-economic models were compared for cellulosic ethanol production for a biorefinery that handles 2000 tons per day of corn stover employing a centralized biorefinery approach with AHP or a de-centralized AFEX pretreatment followed by biomass densification feeding a centralized biorefinery. A techno-economic analysis (TEA) of these scenarios shows that the AFEX process resulted in the highest capital investment but also has the lowest minimum ethanol selling price (MESP) at $2.09/gal, primarily due to good energy integration and an efficient ammonia recovery system. The economics of AHP could be made more competitive if oxidant loadings were reduced and the alkali and sugar losses were also decreased.

LanguageEnglish (US)
Pages9-17
Number of pages9
JournalBioresource Technology
Volume226
DOIs
StatePublished - Feb 1 2017

Profile

Ammonia
ethanol
Enzymes
ammonia
maize
Cellulosic ethanol
enzyme
Economics
Trademarks
Enzymatic hydrolysis
Economic analysis
Alkalies
economic analysis
Oxidants
Densification
economics
Hydrogen peroxide
oxidant
Sugars
hydrogen peroxide

Keywords

  • AFEX
  • AHP
  • Biorefinery
  • Enzyme hydrolysis
  • Pretreatment
  • Techno-economic analysis

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

Techno-economic comparison of centralized versus decentralized biorefineries for two alkaline pretreatment processes. / Stoklosa, Ryan J.; del Pilar Orjuela, Andrea; da Costa Sousa, Leonardo; Uppugundla, Nirmal; Williams, Daniel L.; Dale, Bruce E.; Hodge, David B.; Balan, Venkatesh.

In: Bioresource Technology, Vol. 226, 01.02.2017, p. 9-17.

Research output: Contribution to journalArticle

Stoklosa, Ryan J. ; del Pilar Orjuela, Andrea ; da Costa Sousa, Leonardo ; Uppugundla, Nirmal ; Williams, Daniel L. ; Dale, Bruce E. ; Hodge, David B. ; Balan, Venkatesh. / Techno-economic comparison of centralized versus decentralized biorefineries for two alkaline pretreatment processes. In: Bioresource Technology. 2017 ; Vol. 226. pp. 9-17
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