Technoeconomic Assessment of Hybrid Organosolv–Steam Explosion Pretreatment of Woody Biomass

Document identifier: oai:DiVA.org:ltu-77134
Access full text here:10.3390/en12214206
Keyword: Engineering and Technology, Industrial Biotechnology, Bioprocess Technology, Teknik och teknologier, Industriell bioteknik, Bioprocessteknik, Organosovl, Steam explosion, Technoeconomic, Biorefinery, Ethanol, Lignin, Pretreatment, Biofuels, Biokemisk processteknik, Biochemical Process Engineering
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energy
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

This study investigates technoeconomic performance of standalone biorefinery concepts that utilize hybrid organic solvent and steam explosion pretreatment technique. The assessments were made based on a mathematical process model developed in UniSim Design software using inhouse experimental data. The work was motivated by successful experimental applications of the hybrid pretreatment technique on lignocellulosic feedstocks that demonstrated high fractionation efficiency into a cellulose-rich, a hemicellulose-rich and lignin streams. For the biorefinery concepts studied here, the targeted final products were ethanol, organosolv lignin and hemicellulose syrup. Minimum ethanol selling price (MESP) and Internal rate of return (IRR) were evaluated as economic indicators of the investigated biorefinery concepts. Depending on the configuration, and allocating all costs to ethanol, MESP in the range 0.53–0.95 €/L were required for the biorefinery concepts to break even. Under the assumed ethanol reference price of 0.55 €/L, the corresponding IRR were found to be in the range −1.75–10.7%. Hemicellulose degradation and high steam demand identified as major sources of inefficiencies for the process and economic performance, respectively. Sensitivity of MESP and IRR towards the most influential technical, economic and market parameters performed.

Authors

Sennai Mesfun

RISE Research Institute of Sweden, Stockholm, Sweden
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Leonidas Matsakas

Luleå tekniska universitet; Kemiteknik
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Ulrika Rova

Luleå tekniska universitet; Kemiteknik
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Paul Christakopoulos

Luleå tekniska universitet; Kemiteknik
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