Proposed is a carbon dioxide and sulfur oxide capture and carbon resource conversion system for coal-fired power generation, the system being capable of capturing and converting carbon dioxide in an exhaust gas into a carbon resource by using a basic alkaline mixture solution, thereby being capable of reducing carbon dioxide and also capable of manufacturing sodium carbonate or sodium bicarbonate. In the system, sodium carbonate or sodium bicarbonate manufactured from the captured carbon dioxide is used as a desulfurization agent capturing sulfur oxide in an exhaust gas discharged from a coal-fired power generation plant, and carbon dioxide and sulfur oxide are simultaneously captured, so that an additional flue gas desulfurization equipment is not required to be mounted. Accordingly, the installation space of the desulfurization equipment for removing pollutants contained in gas introduced into carbon dioxide capture equipment may be minimized, and the process cost may be reduced.

Proposed is a carbon dioxide and sulfur oxide capture and carbon resource conversion system for coal-fired power generation, the system being capable of capturing and converting carbon dioxide in an exhaust gas into a carbon resource by using a basic alkaline mixture solution, thereby being capable of reducing carbon dioxide and also capable of manufacturing sodium carbonate or sodium bicarbonate. In the system, sodium carbonate or sodium bicarbonate manufactured from the captured carbon dioxide is used as a desulfurization agent capturing sulfur oxide in an exhaust gas discharged from a coal-fired power generation plant, and carbon dioxide and sulfur oxide are simultaneously captured, so that an additional flue gas desulfurization equipment is not required to be mounted. Accordingly, the installation space of the desulfurization equipment for removing pollutants contained in gas introduced into carbon dioxide capture equipment may be minimized, and the process cost may be reduced.

A method to make LiF crystals by simultaneously adding aqueous LiHCO.sub.3 and HF to a stirred reactor containing water or a solution of LiF. The method yields LiF crystals having a Dv50 particle size of from about 60 m to about 90 m.

A method to make LiF crystals by simultaneously adding aqueous LiHCO.sub.3 and HF to a stirred reactor containing water or a solution of LiF. The method yields LiF crystals having a Dv50 particle size of from about 60 m to about 90 m.

Proposed is a carbon dioxide capture and carbon resource utilization system, for a fuel cell, using boil-off gas (BOG) generated from liquefied natural gas. The system includes a liquefied natural gas storage configured to store liquefied natural gas (LNG), a hydrocarbon reformer configured to react boil-off gas generated from liquefied natural gas storage with water input from outside, thereby generating a gas mixture containing hydrogen and carbon dioxide, a fuel cell configured to generate electric power by receiving hydrogen, a reactor configured to capture carbon dioxide by reacting carbon dioxide with a basic alkali mixture solution and to collect a reaction product containing the captured carbon dioxide and to separate a carbon dioxide reaction product and a waste solution from the reaction product, and a hydrogen generator configured to generate hydrogen and to supply the generated hydrogen to the fuel cell.

Proposed is a carbon dioxide capture and carbon resource utilization system, for a fuel cell, using boil-off gas (BOG) generated from liquefied natural gas. The system includes a liquefied natural gas storage configured to store liquefied natural gas (LNG), a hydrocarbon reformer configured to react boil-off gas generated from liquefied natural gas storage with water input from outside, thereby generating a gas mixture containing hydrogen and carbon dioxide, a fuel cell configured to generate electric power by receiving hydrogen, a reactor configured to capture carbon dioxide by reacting carbon dioxide with a basic alkali mixture solution and to collect a reaction product containing the captured carbon dioxide and to separate a carbon dioxide reaction product and a waste solution from the reaction product, and a hydrogen generator configured to generate hydrogen and to supply the generated hydrogen to the fuel cell.

A continuous process for the production of sodium bicarbonate crystals from the carbon dioxide of a gas stream including an absorption step of the carbon dioxide from a gas stream into an aqueous solution including a sodium carbonate salt to produce an aqueous solution of sodium bicarbonate, then a crystallization step of the sodium bicarbonate salt obtained at the first step. A system for the production of sodium bicarbonate crystals from carbon dioxide of a gas stream including a control unit, an absorption unit and a crystallization unit.

A continuous process for the production of sodium bicarbonate crystals from the carbon dioxide of a gas stream including an absorption step of the carbon dioxide from a gas stream into an aqueous solution including a sodium carbonate salt to produce an aqueous solution of sodium bicarbonate, then a crystallization step of the sodium bicarbonate salt obtained at the first step. A system for the production of sodium bicarbonate crystals from carbon dioxide of a gas stream including a control unit, an absorption unit and a crystallization unit.

A method of easily obtaining a recycled carbon material by removing more Li from a carbon-based negative electrode active material containing Li is provided. A manufacturing method for a recycled carbon material according to the present disclosure includes: a first thermal process step of thermally processing a carbon-based negative electrode active material containing Li together with ethylene carbonate at a temperature less than a boiling point of ethylene carbonate to obtain a thermally processed object containing lithium ethylene dicarbonate; and a second thermal process step of thermally processing the thermally processed object at a temperature more than or equal to the boiling point of ethylene carbonate to convert lithium ethylene dicarbonate into lithium carbonate.