A CO.sub.2 recovery device (1) includes a reaction tank (10), a CO2 gas supply unit (41), and a CO.sub.2-removed gas discharge unit (42). The reaction tank (10) brings CO.sub.2 gas into contact with an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide solution. The CO.sub.2 gas supply unit (41) supplies the CO.sub.2 gas into the reaction tank 10. The CO.sub.2-removed gas discharge unit (42) discharges CO.sub.2-removed gas, from which CO.sub.2 has been removed, from the reaction tank (10). The CO.sub.2 gas supply unit (41) and the CO.sub.2-removed gas discharge unit (42) are attached so as to be detachably attachable to the reaction tank (10).

A method of making sodium carbonate and/or sodium bicarbonate is disclosed in which carbon dioxide gas is reacted with an aqueous solution sodium hydroxide solution in the presence of a compound of the formula (I): Na.sup.+[XO].sup. where X is Cl, Br, or I.

A method of making sodium carbonate and/or sodium bicarbonate is disclosed in which carbon dioxide gas is reacted with an aqueous solution sodium hydroxide solution in the presence of a compound of the formula (I): Na.sup.+[XO].sup. where X is Cl, Br, or I.

Methods are disclosed for manufacturing magnesium carbonate and calcium carbonate, specifically manufacturing refined carbonates such as magnesium carbonate (MgCO.sub.3) and calcium carbonate (CaCO.sub.3) through processes including electrolysis, carbon dioxide injection, and calcium oxide (CaO) or calcium hydroxide (Ca(OH).sub.2) injection in seawater.

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.

This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate.

This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate.

A dry hydrogen production device includes: a reactor to which water or vapor is not supplied; heating means configured to heat the reactor to 200 to 800 C.; a supply line for hydroxide of at least one of alkali and alkali earth connected to the reactor; a biomass supply line connected to the reactor; at least one carrier gas supply line connected to the reactor; a gas phase reaction product outflow line connected to the reactor, a solid-gas separator connected to the gas phase reaction product outflow line; and a gas separator connected to the solid-gas separator.

A dry hydrogen production device includes: a reactor to which water or vapor is not supplied; heating means configured to heat the reactor to 200 to 800 C.; a supply line for hydroxide of at least one of alkali and alkali earth connected to the reactor; a biomass supply line connected to the reactor; at least one carrier gas supply line connected to the reactor; a gas phase reaction product outflow line connected to the reactor, a solid-gas separator connected to the gas phase reaction product outflow line; and a gas separator connected to the solid-gas separator.