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Fibre crops for energy production and energy saving Organic Eprints
Schäfer, Winfried.
The photosynthesis process generates beside carbon hydrates also complex chemical compounds. The artificial synthesis of such compounds is often impossible or may require high energy input compared with their heating value. In other words, the entropy of energy crops is low compared with that of fossil fuels. This fact is usually neglected in energy analysis of bio fuels resulting in questionable political decisions concerning renewable energy. This paper demonstrates that the energy saving and the GHG mitigation potential of fibre crops may be enhanced using them first used as raw material for commercial products before processing to fuel at the end of their lifetime. For example reed canary grass may be used for paper production and after recycling the...
Tipo: Conference paper, poster, etc. Palavras-chave: Technology assessment Recycling; Balancing and resource management Crop husbandry.
Ano: 2012 URL: http://orgprints.org/21040/1/Fibre_crops_Jelgava_2012_s.pdf
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Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean Organic Eprints
Petersson, Anneli; Thomsen, Mette Hedegaard; Hauggaard-Nielsen, Henrik; Thomsen, Anne Belinda.
To meet the increasing need for bioenergy several raw materials have to be considered for the production of e.g. bioethanol and biogas.In this study, three lignocellulosic raw materials were studied, i.e. (1) winter rye straw (Secale cereale L), (2) oilseed rape straw (Brassica napus L.) and (3) faba bean straw (Viciafaba L.). Their composition with regard to cellulose, hemicellulose, lignin, extractives and ash was evaluated, as well as their potential as raw materials for ethanol and biogas production. The materials were pretreated by wet oxidation using parameters previously found to be optimal for pretreatment of corn stover (195 1C, 15 min, 2 g l_1 Na2CO3 and 12 bar oxygen). It was shown that pretreatment was necessary for ethanol production from all...
Tipo: Journal paper Palavras-chave: Farming Systems Recycling; Balancing and resource management Crop husbandry.
Ano: 2007 URL: http://orgprints.org/18980/4/18980.pdf
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Sustainable bioethanol production combining biorefinery principles using combined raw materials from wheat undersown with clover-grass Organic Eprints
Thomsen, Mette Hedegaard; Hauggaard-Nielsen, Henrik.
To obtain the best possible net energy balance of the bioethanol production the biomass raw materials used need to be produced with limited use of non-renewable fossil fuels. Intercropping strategies are known to maximize growth and productivity by including more than one species in the crop stand, very often with legumes as one of the components. In the present study clover-grass is undersown in a traditional wheat crop. Thereby, it is possible to increase input of symbiotic fixation of atmospheric nitrogen into the cropping systems and reduce the need for fertilizer applications. Furthermore, when using such wheat and clover-grass mixtures as raw material, addition of urea and other fermentation nutrients produced from fossil fuels can be reduced in the...
Tipo: Journal paper Palavras-chave: Farming Systems Recycling; Balancing and resource management Crop husbandry.
Ano: 2008 URL: http://orgprints.org/18981/4/18981.pdf
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