The present invention relates to a device for producing high-strength CO.sub.2 pellets from CO.sub.2 snow, in particular, for a cleaning device for blasting surfaces to be treated with a mixed-flow consisting of a compressed gas and CO.sub.2 pellets, including a main compressing device for compressing CO.sub.2 snow for forming CO.sub.2 pellets, further including a pre-compressing device for pre-compressing CO.sub.2 snow produced by expanding liquid CO.sub.2, wherein the pre-compressing device is in the form of a fluid-mechanical pre-compressing device, wherein the pre-compressing device includes an expansion device for producing CO.sub.2 snow from liquid or gaseous CO.sub.2 and a pre-compression chamber for receiving and pre-compressing the produced CO.sub.2 snow and wherein the expansion device and the pre-compression chamber are connected to one another in fluidic manner.

The present invention relates to a device for producing high-strength CO.sub.2 pellets from CO.sub.2 snow, in particular, for a cleaning device for blasting surfaces to be treated with a mixed-flow consisting of a compressed gas and CO.sub.2 pellets, including a main compressing device for compressing CO.sub.2 snow for forming CO.sub.2 pellets, further including a pre-compressing device for pre-compressing CO.sub.2 snow produced by expanding liquid CO.sub.2, wherein the pre-compressing device is in the form of a fluid-mechanical pre-compressing device, wherein the pre-compressing device includes an expansion device for producing CO.sub.2 snow from liquid or gaseous CO.sub.2 and a pre-compression chamber for receiving and pre-compressing the produced CO.sub.2 snow and wherein the expansion device and the pre-compression chamber are connected to one another in fluidic manner.

The invention relates to a cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets, said cleaning appliance comprising an apparatus for producing CO.sub.2 pellets from liquid or gaseous CO.sub.2, wherein the apparatus comprises a pre-compression device for compressing CO.sub.2 snow to form the CO.sub.2 pellets, wherein the cleaning appliance comprises a drive device with a drive shaft for driving the compressing device, and wherein the drive shaft, during the intended use of the cleaning appliance, extends in parallel or substantially in parallel to the direction of gravity.

The present invention relates to a method for the production of sodium bicarbonate, particularly for producing sodium bicarbonate on an industrial scale, the method comprising the steps of: a. treating a carbonaceous feedstock to form a product stream comprising up to 10 v/v % carbon dioxide; b. capturing at least a portion of the carbon dioxide from the product stream to form a carbon dioxide stream; c. feeding the carbon dioxide stream to a reaction vessel; d. feeding an aqueous sodium carbonate solution to the reaction vessel; e. contacting at least a portion of the carbon dioxide stream with at least a portion of the aqueous sodium carbonate solution to form a slurry comprising solid sodium bicarbonate; and f. separating the solid component of the slurry from the liquid component of the slurry to provide solid sodium bicarbonate and an aqueous liquor.

Methods and systems of collecting carbon dioxide are disclosed. In one example, a method includes removing water from atmospheric air with a condenser and a desiccant material to produce dry air, adsorbing carbon dioxide to a material from the dry air, releasing the adsorbed carbon dioxide to a vacuum chamber, and transitioning the released carbon dioxide from a gas to a solid in the vacuum chamber.

Methods and systems of collecting carbon dioxide are disclosed. In one example, a method includes removing water from atmospheric air with a condenser and a desiccant material to produce dry air, adsorbing carbon dioxide to a material from the dry air, releasing the adsorbed carbon dioxide to a vacuum chamber, and transitioning the released carbon dioxide from a gas to a solid in the vacuum chamber.

A method for automatically dispensing and vending carbon dioxide (CO2) snow block is disclosed. The automatic dispensing system contains multiple containers of different volumes. A user can input the volume of CO2 snow block into a controller, such as a programmable logic controller (PLC). The controller uses the inputted volume and process information to determine which container to utilize for the automated filling process. The controller can configure the selected container into a filling orientation into which liquid CO2 can flow to generate CO2 snow block. Upon detection of the completion of the fill, the container is configured into a dispensing orientation from which the CO2 snow block is released into an access region from which the user can retrieve the CO2 snow block. The control methodology may also be used to auto charge a single container located within a charging station as disclosed herein.

A method for automatically dispensing and vending carbon dioxide (CO2) snow block is disclosed. The automatic dispensing system contains multiple containers of different volumes. A user can input the volume of CO2 snow block into a controller, such as a programmable logic controller (PLC). The controller uses the inputted volume and process information to determine which container to utilize for the automated filling process. The controller can configure the selected container into a filling orientation into which liquid CO2 can flow to generate CO2 snow block. Upon detection of the completion of the fill, the container is configured into a dispensing orientation from which the CO2 snow block is released into an access region from which the user can retrieve the CO2 snow block. The control methodology may also be used to auto charge a single container located within a charging station as disclosed herein.

The invention relates to a device for metering carbon dioxide snow, comprising a storage container and a discharge opening arranged in the base of the storage container. A horizontally and vertically movable base, by means of which the discharge opening can be opened and closed, is arranged in the region of the discharge opening. A horizontally movable cutting knife is vertically spaced from the base and can be moved into the interior of the storage container. Once the storage container is filled with carbon dioxide snow a metered amount of carbon dioxide snow present between the cutting knife and the base is cut off by the cutting knife and compacted by vertical movements of the base and is then discharged by the base moving into the open position.

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.