Grøn gas gennem metanisering
description
Transcript of Grøn gas gennem metanisering
Vehicle to grid (V2G) is the future!
An integrated energy infrastructure
CH4 + CO2 + 4H2 2CH4 + 2 H2O
The right factors for biogas upgrading
Livestock, Windturbine capacity and NG consumption per capita
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Pigs
Cattle
Wind,kW
NG MTOe
Haldor Topsøe group (2011)Catalyst and engineering for
Fertilizers
Refineries
The environmental sector
Synthetic fuels
Turnover: DKK 4.4 billion
Result: DKK 397 MM
2091 employees
250 employees in R&D
Synthetic Natural Gas (SNG) - Xinjiang Qinghua
50 PJ corresponding to >50% of the total Danish Natural gas consumption
5 PJ gasified biomass SNG plants are projected
0.1 PJ would be a large biogas methanation unit
Transport SNG in pipelines rather than coal on trucks
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XinjiangQinghua
Gasifiedbiomass
Biogas
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Fuel Cell and Electrolyser
½O2
H2 H2O
½O2
H2O + 2e- → H2 + O2-
O2-
O2- → 2e- +½O2
H2 + O2- → H2O + 2e-
O2-
½O2 + 2e- → O2-
SOFC SOEC
H2H2O
Exergy Flows
Biogas upgrade value proposition # 1
BiogasCH4 +30-40% CO2
H2Electrolysis
BioGas CH4 40 PJ
”Electro-gas” CH4, 27 PJ
Biogas Upgrade
CO2
Fuel synthesis
Biogas upgrade value proposition # 2
Spot prices 2011
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Pre studies
Metan samfundet SOEC biogas upgrade
The business case (w. 5% interest)
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Expensis NG gasprice
Biogasprice
Expensis NG gasprice
Biogasprice
Power Biogas Investment Operational cost Gas sale Heat sale
2020100% Electrolysis
203591% Electrolysis
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DK
K
Plant size:
75 mio Nm3 biogas/year
Pilot test at Foulum – 5 Nm3/h
CH4 + CO2 + 4H2 2CH4 + 2 H2O
Summary
Electrolysis based biogas upgrade has the potential to:
– Store electricity as fuel
– Increase the biogas production
The business case is interesting but many aspects are still uncertain
A pilot scale field trial is planned for 2015