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Energy balances for biogas and solid biofuel production from industrial hemp

Prade, Thomas and Svensson, Sven-Erik and Mattsson, Jan Erik (2012). Energy balances for biogas and solid biofuel production from industrial hemp. Biomass & bioenergy. 40, 36-52
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Official URL: http://dx.doi.org/10.1016/j.biombioe.2012.01.045

Abstract

If energy crops are to replace fossil fuels as source for heat, power or vehicle fuel, their whole production chain must have higher energy output than input. Industrial hemp has high biomass and energy yields. The study evaluated and compared net energy yields (NEY) and energy output-to-input ratios (RO/I) for production of heat, power and vehicle fuel from industrial hemp. Four scenarios for hemp biomass were compared; (I) combined heat and power (CHP) from spring-harvested baled hemp, (II) heat from spring-harvested briquetted hemp, and (III) CHP and (IV) vehicle fuel from autumn-harvested chopped and ensiled hemp processed to biogas in an anaerobic digestion process. The results were compared with those of other energy crops. Calculations were based on conditions in the agricultural area along the Swedish west and south coast. There was little difference in total energy input up to storage, but large differences in the individual steps involved. Further processing to final energy product differed greatly. Total energy ratio was best for combustion scenarios (I) and (II) (RO/Iof 6.8 and 5.1, respectively). The biogas scenarios (III) and (IV) both had low RO/I(2.7 and 2.6, repectively). They suffer from higher energy inputs and lower conversion efficiencies but give high quality products, i.e. electricity and vehicle fuel. The main competitors for hemp are maize and sugar beets for biogas production and the perennial crops willow, reed canary grass and miscanthus for solid biofuel production. Hemp is an above-average energy crop with a large potential for yield improvements.

Authors/Creators:Prade, Thomas and Svensson, Sven-Erik and Mattsson, Jan Erik
Title:Energy balances for biogas and solid biofuel production from industrial hemp
Series/Journal:Biomass & bioenergy (0961-9534)
Year of publishing :2012
Volume:40
Page range:36-52
Number of Pages:17
Publisher:Elsevier
ISSN:0961-9534
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:P Natural resources > P05 Energy resources management
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Renewable Bioenergy Research
Keywords:Net energy yield , Utilisation pathway, Fibre hemp, Energy crop, Scenario, Cannabis sativa L.
URN:NBN:urn:nbn:se:slu:epsilon-e-1722
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1722
Additional ID:
Type of IDID
Web of Science (WoS)000303291500005
DOI10.1016/j.biombioe.2012.01.045
ID Code:10558
Department:(LTJ, LTV) > Agrosystems (until 121231)
Deposited By: SLUpub Connector
Deposited On:06 Dec 2013 14:00
Metadata Last Modified:24 Feb 2016 06:29

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