CCU technology is being researched and developed by companies and institutions around the world, but there are many issues to be addressed, such as the cost of recovering carbon dioxide gas, how to convert it into valuable resources, conversion costs, facility costs, and whether it is commercially viable. This invention proposes a high-value-added CCU system that has potential for future development and can also be used for air conditioning supply.

The system consists of a wet type TSA carbon dioxide gas separation and concentration unit, a saturated vapor generator, a gas cooler, a gas compressor, a dehumidification unit, a gas liquefaction unit and refrigerator, a gas purification tank, and a dry ice production unit. The system is highly energy-efficient, compact, and air-conditionable, using carbon dioxide in the air as the gas source, by using the unliquefied gas from the post-purification process to purge the aforementioned separation and concentration equipment and recovering the uncoagulated gas from the dry ice production equipment.

In order to meter carbon dioxide snow, a storage container has an output unit, which comprises: an output opening, which is arranged laterally in the bottom region of the storage container; and a horizontally movable sliding element, which cooperates with the output opening. In order to fill the storage container with carbon dioxide snow, at least two snow horns are provided on the storage container, in which snow horns liquid carbon dioxide is converted into a mixture of carbon dioxide snow and carbon dioxide gas. The mouth openings of the snow horns point toward each other at least in one direction component so that the material flows exiting therefrom are directed at least partially toward each other. This facilitates the separation of snow and gas and increase the efficiency of the device.

In order to meter carbon dioxide snow, a storage container has an output unit, which comprises: an output opening, which is arranged laterally in the bottom region of the storage container; and a horizontally movable sliding element, which cooperates with the output opening. In order to fill the storage container with carbon dioxide snow, at least two snow horns are provided on the storage container, in which snow horns liquid carbon dioxide is converted into a mixture of carbon dioxide snow and carbon dioxide gas. The mouth openings of the snow horns point toward each other at least in one direction component so that the material flows exiting therefrom are directed at least partially toward each other. This facilitates the separation of snow and gas and increase the efficiency of the device.

A cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets is disclosed and includes an apparatus for producing CO.sub.2 pellets from liquid or gaseous CO.sub.2, wherein the apparatus includes a compressing device for compressing CO.sub.2 snow to form the CO.sub.2 pellets, wherein the compressing device includes an expansion device for creating CO.sub.2 snow by expanding liquid or pressurized CO.sub.2, wherein the expansion device includes an expansion chamber with an expansion chamber inlet, wherein the cleaning appliance includes a CO.sub.2 connection line that is fluidically connected to the expansion chamber inlet for supplying the liquid or gaseous CO.sub.2 to the expansion device, and wherein the cleaning appliance includes a cooling device for cooling the CO.sub.2 connection line.

A cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets is disclosed and includes an apparatus for producing CO.sub.2 pellets from liquid or gaseous CO.sub.2, wherein the apparatus includes a compressing device for compressing CO.sub.2 snow to form the CO.sub.2 pellets, wherein the compressing device includes an expansion device for creating CO.sub.2 snow by expanding liquid or pressurized CO.sub.2, wherein the expansion device includes an expansion chamber with an expansion chamber inlet, wherein the cleaning appliance includes a CO.sub.2 connection line that is fluidically connected to the expansion chamber inlet for supplying the liquid or gaseous CO.sub.2 to the expansion device, and wherein the cleaning appliance includes a cooling device for cooling the CO.sub.2 connection line.

Carbon dioxide may be stored by mineralization. An example method thereof may include: providing a first solution including a first aqueous fluid having dispersed therein a metal salt and a metal catalyst; dispersing carbon dioxide gas in a second solution including a second aqueous fluid, wherein the carbon dioxide gas forms dissolved carbon dioxide; introducing an electrical current to the second solution; generating, using the electrical current, nanobubble carbon dioxide; combining at least a portion of the first solution and at least a portion of the second solution to form a combined solution; and generating mineralized carbon dioxide from the dissolved carbon dioxide and the nanobubble carbon dioxide, wherein the generating at least partially comprises catalytically reacting, using the metal catalyst, the metal salt and one or more of the dissolved carbon dioxide and the nanobubble carbon dioxide, thereby forming the mineralized carbon dioxide.

The invention relates to an apparatus for producing CO.sub.2 pellets from CO.sub.2 snow, in particular, for a cleaning device for spraying surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets, includes a compressor device for compressing CO.sub.2 snow to form CO.sub.2 pellets. The compressor device includes a gear compressor. The gear compressor includes at least one compressor wheel which is mounted rotatable about a first rotation axis and has a plurality of compressing elements, and includes at least one intake wheel which has a plurality of snow intakes for accepting CO.sub.2 snow. The snow intakes are configured corresponding to the compressing elements. The intake wheel is mounted rotatable about a second rotation axis and cooperates with the at least one compressor wheel. The intake wheel includes an intake wheel sleeve with an intake wheel sleeve wall.

An apparatus for producing dry ice includes a supply means (2) for supplying carbon dioxide in the liquid state and a means (20) for the transition of state of the carbon dioxide in the liquid state flowing along the supply means (2). The state transition means (20) brings about the desired solidification of the carbon dioxide in order to produce dry ice and the undesired formation of carbon dioxide in the gaseous state. A system (3) is provided for the collection and recovery of carbon dioxide in the gaseous state. The collection and recovery system (3) collects carbon dioxide in the gaseous state downstream of the state transition means (20) and has a compressor (4) for compressing the carbon dioxide collected by the collection system (3), a heat exchanger (5) that places the carbon dioxide downstream of the compressor (4) and the carbon dioxide upstream of the compressor (4) in thermal communication, and a storage means (6) for storing the carbon dioxide coming from the compressor (4).

A method/system for sequestering carbon dioxide from cement and lime production facilities wherein carbon dioxide from flue gases originating from cement or lime production facilities is recovered and transported to a building materials production facility where it is sequestered.

The present disclosure relates to a process and apparatus for capturing carbon dioxide in flue gas, and the present disclosure performs a carbon dioxide recovery separation membrane process using cold heat in a carbon dioxide liquefaction process through a separation tower, thereby reducing energy consumption and remarkably improving separation efficiency.