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LCA of biomethane / Marius Adelt in Journal of natural gas science and engineering, Vol. 3 N° 5 (Octobre 2011) 

Public ISBD [article]  in Journal of natural gas science and engineering > Vol. 3 N° 5 (Octobre 2011) . - pp. 646–650 Titre : LCA of biomethane Type de document : texte imprimé Auteurs : Marius Adelt, Auteur ; Dieter Wolf, Auteur ; Alexander Vogel, Auteur Année de publication : 2012 Article en page(s) : pp. 646–650 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Biomethane  Energy  crops  GHG  emissions  Cumulative  energy  demand Résumé : As a renewable substitute for natural gas in the pipeline system, biomethane is a key option on the way to sustainable, renewable energy supplies. This paper evaluates biomethane production from energy crops with respect to its environmental impact and energy efficiency, taking into consideration own measurements and experience data from a modern, commercial plant as well as current studies. According to this study the specific GHG emissions associated with the production of biomethane amount to as little as 44.6 g CO2eq/kWh, corresponding to an overall GHG emission reduction of 82% compared with natural gas. The specific non-renewable energy demand of the entire process is very low at only 12%. These two indicators are due either to environmentally friendly plant cultivation (fermenter residues used as fertilizer) or to optimized plant design and operation (amine upgrading, renewable process heat, gas-tight equipment, industrial process control system). ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510011000734 [article] LCA of biomethane [texte imprimé] / Marius Adelt, Auteur ; Dieter Wolf, Auteur ; Alexander Vogel, Auteur . - 2012 . - pp. 646–650. Génie Chimique Langues : Anglais (eng) in Journal of natural gas science and engineering > Vol. 3 N° 5 (Octobre 2011) . - pp. 646–650 Mots-clés : Biomethane  Energy  crops  GHG  emissions  Cumulative  energy  demand Résumé : As a renewable substitute for natural gas in the pipeline system, biomethane is a key option on the way to sustainable, renewable energy supplies. This paper evaluates biomethane production from energy crops with respect to its environmental impact and energy efficiency, taking into consideration own measurements and experience data from a modern, commercial plant as well as current studies. According to this study the specific GHG emissions associated with the production of biomethane amount to as little as 44.6 g CO2eq/kWh, corresponding to an overall GHG emission reduction of 82% compared with natural gas. The specific non-renewable energy demand of the entire process is very low at only 12%. These two indicators are due either to environmentally friendly plant cultivation (fermenter residues used as fertilizer) or to optimized plant design and operation (amine upgrading, renewable process heat, gas-tight equipment, industrial process control system). ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510011000734

Optimisation of biogas production by infrared spectroscopy-based process control / Dieter Wolf in Journal of natural gas science and engineering, Vol. 3 N° 5 (Octobre 2011) 

Public ISBD [article]  in Journal of natural gas science and engineering > Vol. 3 N° 5 (Octobre 2011) . - pp. 625–632 Titre : Optimisation of biogas production by infrared spectroscopy-based process control Type de document : texte imprimé Auteurs : Dieter Wolf, Auteur ; Harald Von Canstein, Auteur ; Cathrin Schröder, Auteur Année de publication : 2012 Article en page(s) : pp. 625–632 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Biogas  Biomethane  Near  infrared  spectroscopy  (NIRS)  Process  automation  Raw  biogas  Ultrasonic  volumetric  flow  metre Résumé : Biomethane being a storable and base load capable energy carrier has an important role in the energy policy of the German government. The high targets for future production levels require an efficient production of biogas to yield the most biogas from either energy crops or organic waste, and to fully utilise the gas production capacity of biogas plants. Both processes can yet be optimised, and the two novel measuring technologies presented here may play an important part in this. The continuous analysis of biomass as input for a biogas plant and of the media inside the digesters was conducted by near infrared-based spectroscopy. First results indicate a high degree of accuracy for key process parameters compared to laboratory analyses. The measurement of the volumetric flow of raw biogas in the different stages of the process was performed with ultrasonic biogas meters. First results show a high degree of precision. The results will be used to develop a model towards process automation. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S187551001100076X [article] Optimisation of biogas production by infrared spectroscopy-based process control [texte imprimé] / Dieter Wolf, Auteur ; Harald Von Canstein, Auteur ; Cathrin Schröder, Auteur . - 2012 . - pp. 625–632. Génie Chimique Langues : Anglais (eng) in Journal of natural gas science and engineering > Vol. 3 N° 5 (Octobre 2011) . - pp. 625–632 Mots-clés : Biogas  Biomethane  Near  infrared  spectroscopy  (NIRS)  Process  automation  Raw  biogas  Ultrasonic  volumetric  flow  metre Résumé : Biomethane being a storable and base load capable energy carrier has an important role in the energy policy of the German government. The high targets for future production levels require an efficient production of biogas to yield the most biogas from either energy crops or organic waste, and to fully utilise the gas production capacity of biogas plants. Both processes can yet be optimised, and the two novel measuring technologies presented here may play an important part in this. The continuous analysis of biomass as input for a biogas plant and of the media inside the digesters was conducted by near infrared-based spectroscopy. First results indicate a high degree of accuracy for key process parameters compared to laboratory analyses. The measurement of the volumetric flow of raw biogas in the different stages of the process was performed with ultrasonic biogas meters. First results show a high degree of precision. The results will be used to develop a model towards process automation. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S187551001100076X