Porsö, Charlotta and Hammar, Torun and Nilsson, Daniel and Hansson, Per-Anders
(2018).
Time-Dependent Climate Impact and Energy Efficiency of Internationally Traded Non-torrefied and Torrefied Wood Pellets from Logging Residues.
Bioenergy Research. 11
:1
, 139-151
[Journal article]
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Available under License Creative Commons Attribution. 934kB |
Official URL: http://dx.doi.org/10.1007/s12155-017-9884-x
Abstract
Demand for wood pellets as a renewable alternative to fossil fuels has increased in the past decade. However, production and use of wood pellets involves several operations (biomass extraction, chipping, transport, drying, milling, pelleting, combustion) with negative impacts on e.g. the climate. In this study, the energy efficiency and climate impact of production and use of non-torrefied and torrefied wood pellets were analysed and compared. The wood pellets, produced from logging residues extracted from a boreal coniferous forest stand (Norway spruce (Picea abies (L.) H. Karst)) in northern Sweden, were assumed to be exported and finally used in a power plant. Time-dependent life cycle assessment, expressing the climate impact as global temperature change over time, was used to include annual greenhouse gas fluxes of both fossil and biogenic origin. The results showed that carbon stock changes due to extraction of logging residues contributed most of the warming effect on global temperature. Due to greater
demand for raw material, a higher warming impact per gigajoule fuel was obtained for torrefied wood pellets than for nontorrefied wood pellets. However, torrefied wood pellets demonstrated a lower climate impact (per GJ electricity) when advantages such as higher electrical energy efficiency and higher co-firing rate were ncluded. A general conclusion from this study is that replacing coal with non-torrefied or torrefied wood pellets made from logging residues can mitigate climate change. The energy output of these systems was about sevenfold the primary energy input.
Authors/Creators: | Porsö, Charlotta and Hammar, Torun and Nilsson, Daniel and Hansson, Per-Anders |
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Title: | Time-Dependent Climate Impact and Energy Efficiency of Internationally Traded Non-torrefied and Torrefied Wood Pellets from Logging Residues |
Series Name/Journal: | Bioenergy Research |
Year of publishing : | 2018 |
Volume: | 11 |
Number: | 1 |
Page range: | 139-151 |
Number of Pages: | 13 |
Publisher: | Springer Verlag |
ISSN: | 1939-1234 |
Language: | English |
Publication Type: | Journal article |
Refereed: | Yes |
Article category: | Scientific peer reviewed |
Version: | Published version |
Copyright: | Creative Commons: Attribution 4.0 |
Full Text Status: | Public |
Agris subject categories.: | K Forestry > K01 Forestry - General aspects P Natural resources > P01 Nature conservation and land resources |
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research (A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Energy Systems |
Agrovoc terms: | global warming, international trade, wood |
Keywords: | Life cycle assessment, LCA, Global warming, Time-dependent climate impact, Biogenic carbon, Torrefied wood pellets |
URN:NBN: | urn:nbn:se:slu:epsilon-e-4608 |
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4608 |
ID Code: | 14967 |
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap |
Department: | (NL, NJ) > Dept. of Energy and Technology |
Deposited By: | SLUpub Connector |
Deposited On: | 11 Jan 2018 08:19 |
Metadata Last Modified: | 12 Mar 2018 09:33 |
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