Techno-economic comparison of centralized versus decentralized biorefineries for two alkaline pretreatment processes
| Autor: | Leonardo da Costa Sousa, David B. Hodge, Daniel L. Williams, Nirmal Uppugundla, Ryan J. Stoklosa, Bruce E. Dale, Venkatesh Balan, Andrea Orjuela |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Environmental Engineering 020209 energy Biomass Bioengineering 02 engineering and technology 01 natural sciences Zea mays Ammonia chemistry.chemical_compound 010608 biotechnology Enzymatic hydrolysis 0202 electrical engineering electronic engineering information engineering Sodium Hydroxide Hydrogen peroxide Sugar Waste Management and Disposal Waste management Ethanol Renewable Energy Sustainability and the Environment Chemistry Hydrolysis Monosaccharides General Medicine Hydrogen Peroxide Biorefinery Enzymes Corn stover Cellulosic ethanol Costs and Cost Analysis Plant Shoots Biotechnology |
| Zdroj: | Bioresource technology. 226 |
| ISSN: | 1873-2976 |
| Popis: | In this work, corn stover subjected to ammonia fiber expansion (AFEX™)1 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 2000tons 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. |
| Databáze: | OpenAIRE |
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