- Substitute natural gas
Substitute natural gas, or SNG, can be produced from
fossil fuelssuch as lignite coal or from biofuels, when it is named Bio-SNG.
Great Plains, USA, approximately 15 TWh/year of SNG from lignite coal is injected into the national gas grid. The production process of SNG at the Great Plains plant involves gasification, gas cleaning, shift and methanation.
It is advantageous to distribute SNG and bio-SNG together with natural gas in a gas grid. In this way, the production of renewable gas can be phased in at the same rate as the production capacity is increased. The gas market and infrastructure the natural gas has contributed with is a condition for large scale introduction of renewable biomethane produced through anaerobic digestion (biogas) or gasification and methanation
Renewable natural gas
* [http://www.sgc.se/rapporter/display.asp?ID=1182 SGC Rapport 187 Substitute natural gas from biomass gasification]
* [http://www.sgc.se/Rapporter/Resources/seminar_screen.pdf SGC-rapport on gasification and methanation]
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