Abstract: An amount of atmospheric emission of carbon dioxide can be reduced by a method for producing a synthetic fuel including a gasification step G of gasifying waste by reacting it with oxygen and water at a high temperature, a carbon dioxide separation step S of separating carbon dioxide from a gasified gas G1 produced in the step G and an FT synthesis step FT of producing the synthetic fuel by Fischer-Tropsch synthesis from a synthetic gas G2 from which carbon dioxide has been separated in the step S, the method for producing a synthetic fuel further including a carbon dioxide electrolysis step E of electrolyzing the carbon dioxide separated in the step S to produce an electrolyzed gas G3 containing carbon monoxide and carbon dioxide and a methanol synthesis step M of reacting the electrolyzed gas G3 produced in the step E with hydrogen to produce methanol.

Abstract: An amount of atmospheric emission of carbon dioxide can be reduced by a method for producing a synthetic fuel including a gasification step G of gasifying waste by reacting it with oxygen and water at a high temperature, a carbon dioxide separation step S of separating carbon dioxide from a gasified gas G1 produced in the step G, an FT synthesis step FT of producing the synthetic fuel by Fischer-Tropsch synthesis from a synthetic gas G2 produced in the step S and a carbon dioxide electrolysis step E of electrolyzing the carbon dioxide separated in the step S to produce an electrolyzed gas G3 containing carbon monoxide and carbon dioxide, the electrolyzed gas G3 produced in the carbon dioxide electrolysis step E being supplied to the carbon dioxide separation step S such that carbon dioxide is separated from the gasified gas G1 and the electrolyzed gas G3.

Abstract: The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.

Abstract: The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.