The liquefaction process removes the impurities such as carbon dioxide, sulphur compounds, ... the liquefaction of coal mine gas.[PDF] LIQUEFACTION OF COAL - Energy.gov | Department of EnergyAdobe PDFsetting up Coal Liquefaction Plant in India, a ... also go a long way for supplying alternate fuel source to the country. 9The technology transfer for direct coalNatural gas (coal bed methane) liquefa