Substitute natural gas
Encyclopedia
Substitute natural gas, or SNG, can be produced from fossil fuels such as lignite coal or from biofuels
, when it is named Bio-SNG.
In the 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
.
Biofuel
Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Biofuels include fuels derived from biomass conversion, as well as solid biomass, liquid fuels and various biogases...
, when it is named Bio-SNG.
In the Great Plains
Great Plains
The Great Plains are a broad expanse of flat land, much of it covered in prairie, steppe and grassland, which lies west of the Mississippi River and east of the Rocky Mountains in the United States and Canada. This area covers parts of the U.S...
, 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
Gasification
Gasification is a process that converts organic or fossil based carbonaceous materials into carbon monoxide, hydrogen, carbon dioxide and methane. This is achieved by reacting the material at high temperatures , without combustion, with a controlled amount of oxygen and/or steam...
, gas cleaning, shift and methanation
Methanation
Methanation is a physical-chemical process to generate Methane from a mixture of various gases out of biomass fermentation or thermo-chemical gasification. The main components are carbon monoxide and hydrogen...
.