New Developments in Biogas Upgrading (in Austria) New Developments in Biogas Upgrading (in Austria) DI Dr. Michael HARASEK, DI Aleksander MAKARUK Technische Universität Wien Institut für Verfahrenstechnik, Umwelttechnik und Technische Biowissenschaften [email protected][email protected]http://www.thvt.at NEW: http://www.virtuellesbiogas.at http://bio.methan.at
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New Developments in Biogas Upgrading (in Austria)
New Developments in Biogas Upgrading (in Austria)
DI Dr. Michael HARASEK, DI Aleksander MAKARUK
Technische Universität WienInstitut für Verfahrenstechnik, Umwelttechnik und Technische Biowissenschaften
Energy consumption analysis• Main energy consumer of upgrading is the raw biogas
compressor.• Energy demand for constant product gas quality and quantity
depends also on raw biogas methane content.• Effect of plant layout (number of stages) on energy consumption:
– Two stage gas grid injection plant: 0,378 kWh/m³STP of product gas– Single stage Bio-CNG-plant: 0,280 kWh/m³STP of product gas
• Related to the methane content of the produced biomethane gas stream:– Two stage gas grid injection plant: 3,2% (98,1vol% CH4)– Single stage Bio-CNG-plant: 2,8% (96,1vol% CH4)
• All values are valid for a product gas delivery pressure of about 3 bar(g).
New Developments in Biogas Upgrading (in Austria)
Possibilities of CO2 selective membranesfor the separation of CH4/CO2
Relation between CO2 permeability and CO2/CH4 selectivity of TR polymers (PI derived polymers with intrinsic cavities)
From [H. B. Park et al., Science 318, 254 -258 (2007)] Reprinted with permission of AAAS
New Developments in Biogas Upgrading (in Austria)
Improvements using more selectivemembranes
• Single stage countercurrent-flow membrane model• 60% CH4 in feed; 97% CH4 in product (retentate)
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membrane selectivity [-]
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relative membrane arearelative recoveryrelative energy consumption
base case - single membrane modulepressure ratio = 8
New Developments in Biogas Upgrading (in Austria)
First Austrian biomethane fueling stationin Operation…
• Further Information: http://www.methapur.com„Biomethantankstelle Margarethen/Moos“
35 m³/h biomethane
New Developments in Biogas Upgrading (in Austria)
Process Design – Margarethen am Moos
• Concept includes in-situ desulphurization / single stage gas permeation• Permeate fed back to CHP plant – Zero methane emission of biogas
upgrading system
New Developments in Biogas Upgrading (in Austria)
Methapur concept: supply of max. 100 vehicles with biomethane
• Capacity up to 500 kg/d biomethane
• Operation of the firstbiogas driven tractor in Austria
New Developments in Biogas Upgrading (in Austria)
Costs for CO2 Separation
• New calculations by Fraunhofer Institut UMSICHT (2008)