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: Research - peer-reviewArticle

    • 4 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

    ethanol
    ammonia
    maize
    enzyme
    economics
    comparison
    Ammonia
    Economics
    Enzymes
    economic analysis
    oxidant
    hydrogen peroxide
    hydrolysis
    sugar
    biomass
    energy
    post-treatment
    loss
    fibre
    price

    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: Research - peer-reviewArticle

    Stoklosa RJ, del Pilar Orjuela A, da Costa Sousa L, Uppugundla N, Williams DL, Dale BE et al. Techno-economic comparison of centralized versus decentralized biorefineries for two alkaline pretreatment processes. Bioresource Technology. 2017 Feb 1;226:9-17. Available from, DOI: 10.1016/j.biortech.2016.11.092
    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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