NOVELTY - Coal liquefaction involves mixing coal, oxygen and steam at 800-1800 degrees C and 0.1-4megapascal in gasification furnace to generate gas. The gas comprises hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, carbonyl sulfide and methane, where volume percentage of hydrogen and carbon dioxide gas is more than 60%. Crude gas is entered to purifying device to remove dust and acidic gases (carbon dioxide, hydrogen sulfide, carbonyl sulfide) using low temperature methanol.    USE - Method for liquefying coal for separating carbon dioxide (claimed).    DETAILED DESCRIPTION - Indirect coal liquefaction involves mixing coal, oxygen and steam at 800-1800 degrees C and 0.1-4megapascal in gasification furnace to generate gas. The gas comprises hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, carbonyl sulfide and methane, where volume percentage of hydrogen and carbon dioxide gas is more than 60%. Crude gas is entered to purifying device to remove dust and acidic gases (carbon dioxide, hydrogen sulfide, carbonyl sulfide) using low temperature methanol. Purified gas containing hydrogen sulfide (less than 0.1ppm) and carbon dioxide (less than 20ppm) is supplied to Fischer-Tropsch synthesis reactor that is connected to chemical chain hydrogen production device and gas washing separating tower. One-third volume of gas is passed to washing and separating tower. Two-third volume of gas is passed to Fischer-Tropsch synthesis reactor that is made of iron-based catalyst. Fischer-Tropsch synthesis reaction of gas is performed at 260-330 degrees C and 2-3megapascal to obtain product containing wax, heavy oil and light oil, where boiling point of wax is 300-500 degrees C. Obtained product is supplied to oil washing tower and gas washing and separating tower. Remaining gas is supplied to chemical chain hydrogen production device of fuel reactor. Iron(III) oxide is treated at 850-950 degrees C in fuel reactor to produce carbon dioxide, water vapor and iron(II) oxide. Obtained iron(II) oxide is supplied to chemical chain hydrogen production device of fuel reactor, where iron(II) oxide is reacted with steam to produce iron(II) oxide iron(III) oxide and hydrogen. Obtained hydrogen is supplied to Fischer-Tropsch synthesis reactor and iron(II) oxide iron(III) oxide are supplied to chemical chain hydrogen plant. Iron(II) oxide iron(III) oxide are reacted with steam to produce iron(III) oxide, which is then supplied back to reactor to recycle iron(III) oxide.