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Bioethanol production from forestry residues : A comparative techno-economic analysis

Frankó, Balázs LU ; Galbe, Mats LU and Wallberg, Ola LU (2016) In Applied Energy 184. p.727-736
Abstract

A techno-economic analysis was conducted to assess the feasibility of using forestry residues with different bark contents for bioethanol production. A proposed cellulosic ethanol biorefinery in Sweden was simulated with Aspen Plus. The plant was assumed to convert different forestry assortments (sawdust and shavings, fuel logs, early thinnings, tops and branches, hog fuel and pulpwood) to ethanol, pellets, biogas and electricity. The intention was not to obtain absolute ethanol production costs for future facilities, but to assess and compare the future potential of utilizing different forestry residues for bioethanol production. The same plant design and operating conditions were assumed in all cases, and the effect of including bark... (More)

A techno-economic analysis was conducted to assess the feasibility of using forestry residues with different bark contents for bioethanol production. A proposed cellulosic ethanol biorefinery in Sweden was simulated with Aspen Plus. The plant was assumed to convert different forestry assortments (sawdust and shavings, fuel logs, early thinnings, tops and branches, hog fuel and pulpwood) to ethanol, pellets, biogas and electricity. The intention was not to obtain absolute ethanol production costs for future facilities, but to assess and compare the future potential of utilizing different forestry residues for bioethanol production. The same plant design and operating conditions were assumed in all cases, and the effect of including bark on the whole conversion process, especially how it influenced the ethanol production cost, was studied. While the energy efficiency (not including district heating) obtained for the whole process was between 67 and 69% regardless of the raw material used, the ethanol production cost differed considerably; the minimum ethanol selling price ranging from 0.77 to 1.52 USD/L. Under the basic assumptions, all the forestry residues apart from sawdust and shavings exhibited a negative net present value at current market prices. The profitability decreased with increasing bark content of the raw material. Sensitivity analyses showed that, at current market prices, the utilization of bark-containing forestry residues will not provide significant cost improvement compared with pulpwood unless the conversion of cellulose and hemicellulose to monomeric sugars is improved.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bark, Bioethanol, Forestry residues, Softwood, Techno-economic evaluation
in
Applied Energy
volume
184
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85002412688
  • wos:000389785200058
ISSN
0306-2619
DOI
10.1016/j.apenergy.2016.11.011
language
English
LU publication?
yes
id
b5f47233-7586-459d-9604-95de703f97d7
date added to LUP
2016-12-23 07:34:18
date last changed
2017-11-19 04:36:10
@article{b5f47233-7586-459d-9604-95de703f97d7,
  abstract     = {<p>A techno-economic analysis was conducted to assess the feasibility of using forestry residues with different bark contents for bioethanol production. A proposed cellulosic ethanol biorefinery in Sweden was simulated with Aspen Plus. The plant was assumed to convert different forestry assortments (sawdust and shavings, fuel logs, early thinnings, tops and branches, hog fuel and pulpwood) to ethanol, pellets, biogas and electricity. The intention was not to obtain absolute ethanol production costs for future facilities, but to assess and compare the future potential of utilizing different forestry residues for bioethanol production. The same plant design and operating conditions were assumed in all cases, and the effect of including bark on the whole conversion process, especially how it influenced the ethanol production cost, was studied. While the energy efficiency (not including district heating) obtained for the whole process was between 67 and 69% regardless of the raw material used, the ethanol production cost differed considerably; the minimum ethanol selling price ranging from 0.77 to 1.52 USD/L. Under the basic assumptions, all the forestry residues apart from sawdust and shavings exhibited a negative net present value at current market prices. The profitability decreased with increasing bark content of the raw material. Sensitivity analyses showed that, at current market prices, the utilization of bark-containing forestry residues will not provide significant cost improvement compared with pulpwood unless the conversion of cellulose and hemicellulose to monomeric sugars is improved.</p>},
  author       = {Frankó, Balázs and Galbe, Mats and Wallberg, Ola},
  issn         = {0306-2619},
  keyword      = {Bark,Bioethanol,Forestry residues,Softwood,Techno-economic evaluation},
  language     = {eng},
  month        = {12},
  pages        = {727--736},
  publisher    = {Elsevier},
  series       = {Applied Energy},
  title        = {Bioethanol production from forestry residues : A comparative techno-economic analysis},
  url          = {http://dx.doi.org/10.1016/j.apenergy.2016.11.011},
  volume       = {184},
  year         = {2016},
}