The
Great Plains Synfuels Plant injects approximately 4.1 million m3/day of SNG from lignite coal into the
United States national gas grid. The production process of SNG at the Great Plains plant involves
gasification, gas cleaning, shift, and
methanation. China is constructing nearly 30 nos massive SNG production plants from coal / lignite with aggregate annual capacity of 120 billion standard cubic meters of SNG. SNG can be produced from low
rank coal/lignite using hydrogen. When hydrogen is used in place of oxygen/air, the
gasification process is called hydrogasification. ==See also==