Carbon Dioxide
Home + BOC Cryospeed + Cryogenic Gases + Carbon Dioxide
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Features
- Colourless gas
- Heavier than air
- Odourless
- Dissolved in water, it forms carbonic acid, (H2CO3)
- Inert to most materials at normal temperatures and pressures
- Forms dry ice when expanded to atmospheric pressure
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Specification
- Carbon dioxide 99.9%v/v
- Moisture 20ppm
- Oxygen 30ppm
- Carbon monoxide 10ppm
- Residual gases 0.025%v/v
- NOx (each) 1.5ppm
- Ammonia 2.5ppm
- Total hydrocarbons (as methane) 50ppm
- Total sulphur (as S) 0.5ppm
- Oil 2ppm w/w
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Product Applications
| Beverage packaging |
Carbon dioxide is injected into chilled beverages in a high-pressure ‘mixing bowl’ prior to packaging in cans or bottles. When the pressure is released by opening the container, the beverage fizzes as dissolved carbon dioxide comes out of solution. |
| Beverage dispensing |
Carbon dioixde is used to carbonate beer, lager and soft drinks by dissolving
the gas into the drink prior to dispensing. |
| Electronics |
Carbon dioxide has a number of uses in this field including particle removal and wafer cleaning. |
| Fire extinguishers |
Carbon dioxide extinquishes flames by a combination of cooling and exclusion of air from fires. Large in-situ fire extinguishing systems are fed by liquid carbon dioxide. |
| Foamed plastics |
Carbon dioxide is dissolved in pressurised molten plastic. When the pressure is released, the gas comes out of solution, forming small bubbles that create the foam. |
| Fog machines |
Carbon dioxide is used to produce special effects for film and TV. |
| Food chilling |
Liquid carbon dioxide is especially suited to blender chilling applications and flour chilling in pneumatic conveyors. |
| Food processing |
Certain components can be extracted from food by immersing them in liquid carbon dioxide. An example is the extraction of flavouring agents from hops in the brewing industry. |
| Medical |
The presence of carbon dioxide in a respired atmosphere stimulates deeper and faster breathing. This phenomenon is utilised in both the treatment of human and respiratory problems and in the euthanasia of animals and insects. |
| Metals |
Carbon dioxide can be used in the hardening of cores used in foundry sand moulding techniques. |
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