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The effect of high solids loading in ethanol production integrated with a pulp mill
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- Svensson, Elin, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
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- Lundberg, Valeria, 1984 (author)
- RISE,Innventia,Chalmers University of Technology, Sweden
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- Jansson, M. (author)
- RISE,Innventia
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- (creator_code:org_t)
- Elsevier BV, 2016
- 2016
- English.
- In: Chemical Engineering Research and Design. - : Elsevier BV. - 0263-8762 .- 1744-3563. ; 111, s. 387-402
- Journal article (peer-reviewed)
Abstract
Subject headings
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- In this paper, two ethanol processes integrated with a softwood pulp mill are compared with regard to their steam demand, process integration potential and profitability. The processes differ in the solids loading in the simultaneous saccharification and fermentation step and in the resulting ethanol concentration. The results show that a higher ethanol concentration does not necessarily lead to significant reductions in steam demand. Instead, it is demonstrated that the steam demand for distillation is highly dependent on the design of the distillation plant. Nevertheless, a higher solids loading (high gravity) can be beneficial for the treatment of the stillage from the distillation plant. A higher solids loading results either in a lower steam demand for evaporation of the stillage or possibly in a reduced demand for effluent treatment compared to a conventional solids loading process. While the results show that a higher ethanol concentration leads to advantages in energy costs and investment costs for the distillation plant, they also show that the potential benefits of a high-gravity process are offset by the expected decrease in ethanol yield, which leads to higher raw material costs. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Keyword
- biomass
- corn stover
- saccharification
- High gravity
- Techno-economic assessment
- softwood
- energy efficiency
- Biorefinery
- wood
- Engineering
- fermentation
- Pulp mill
- Ethanol
- Pinch analysis
- lignocellulosic ethanol
- simultaneous
- pretreatment
- enzymatic-hydrolysis
Publication and Content Type
- art (subject category)
- ref (subject category)
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