title: Power generation based on biomass by combined fermentation and gasification--a new concept derived from experiments and modelling.
abstract: A new concept is proposed for combined fermentation (two-stage high-load fermenter) and gasification (two-stage fluidised bed gasifier with CO2 separation) of sewage sludge and wood, and the subsequent utilisation of the biogenic gases in a hybrid power plant, consisting of a solid oxide fuel cell and a gas turbine. The development and optimisation of the important processes of the new concept (fermentation, gasification, utilisation) are reported in detail. For the gas production, process parameters were experimentally and numerically investigated to achieve high conversion rates of biomass. For the product gas utilisation, important combustion properties (laminar flame speed, ignition delay time) were analysed numerically to evaluate machinery operation (reliability, emissions). Furthermore, the coupling of the processes was numerically analysed and optimised by means of integration of heat and mass flows. The high, simulated electrical efficiency of 42% including the conversion of raw biomass is promising for future power generation by biomass.
authors.affiliation: Institute of Combustion Technology, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany. Electronic address: torsten.methling@dlr.de.
authors.forename: Torsten
authors.initials: T
authors.lastname: Methling
authors.affiliation: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany.
authors.forename: Nina
authors.initials: N
authors.lastname: Armbrust
authors.affiliation: Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Nobelstrasse 12, 70569 Stuttgart, Germany.
authors.forename: Thilo
authors.initials: T
authors.lastname: Haitz
authors.affiliation: Institute of Technical Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Speidel
authors.affiliation: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany.
authors.forename: Norman
authors.initials: N
authors.lastname: Poboss
authors.affiliation: Institute of Combustion Technology, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.
authors.forename: Marina
authors.initials: M
authors.lastname: Braun-Unkhoff
authors.affiliation: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany.
authors.forename: Heiko
authors.initials: H
authors.lastname: Dieter
authors.affiliation: Fraunhofer Institute for Interfacial Engineering and Biotechnology, Nobelstrasse 12, 70569 Stuttgart, Germany.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Kempter-Regel
authors.affiliation: Institute of Technical Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.
authors.forename: Gerard
authors.initials: G
authors.lastname: Kraaij
authors.affiliation: Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Nobelstrasse 12, 70569 Stuttgart, Germany.
authors.forename: Ursula
authors.initials: U
authors.lastname: Schliessmann
authors.affiliation: Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Nobelstrasse 12, 70569 Stuttgart, Germany.
authors.forename: Yasemin
authors.initials: Y
authors.lastname: Sterr
authors.affiliation: Institute of Technical Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Wörner
authors.affiliation: Institute of Interfacial Process Engineering and Plasma Technology, University of Stuttgart, Nobelstrasse 12, 70569 Stuttgart, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Hirth
authors.affiliation: Institute of Combustion Technology, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.
authors.forename: Uwe
authors.initials: U
authors.lastname: Riedel
authors.affiliation: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany.
authors.forename: Günter
authors.initials: G
authors.lastname: Scheffknecht
mesh_terms: D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002245:Carbon Dioxide / Q000032:analysis; D003198:Computer Simulation; D004560:Electricity; D005285:Fermentation; D005740:Gases / Q000737:chemistry*; D008962:Models, Theoretical; D012722:Sewage / Q000737:chemistry; D012820:Silage; D014835:Volatilization; D014934:Wood / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry
chemical_list: D056804:Biofuels; D005740:Gases; D012722:Sewage; D002245:Carbon Dioxide
keywords: Decentralized power generation; Fermentation; Gasification; Hybrid power plant; Sewage sludge