TECHNOLOGY OF MINE GAS COMPLEX PROCESSING ALONG WITH COMMERCIAL LIQUID METHANE PRODUCTION
DOI:
https://doi.org/10.18198/j.ind.gases.2010.0498Keywords:
Mine gas, Liquefied methane, Explosibility, Catalytic oxidation, Cryogenic cycle, Pressure swing adsorption, Specific power consumption, Extraction ratio, Rectification column, Waste energyAbstract
Russia has great resources of mine gas, which are 80 tril. m3. In future its production may reach 20 bil. m3 annually. Developed technology of mine gas complex processing, which contains oxygen has been described. The technology provides a catalytic removal of oxygen at the first stage and further purification from the generated CO2 and H2O by a pressure swing adsorption method. Nitrogen refrigeration cycle with pre-cooling and turboexpander-compressor set is applied for further gas cooling, nitrogen extraction and commercial liquid methane production. Cryogenic rectification is used for nitrogen and methane separation. Fuel gas is extracted as by-product and oxidation reaction heat of hydrocarbons which can be used as waste energy is carried out.
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