Carbon Dioxide R744 is a natural refrigerant gas, with multiple applications in commercial refrigeration, the food industry and refrigerated logistics.
Its main characteristics are:
- High refrigerating power
- Higher quality than the specifications required by the regulations
- GWP – Global Warming Potential = 1
- ODP – Ozone Depletion Potential =0
- No legal limits on use
- No need for disposal
Thanks to the innovative biogas upgrade technology developed by the Gaschema, R744 comes from renewable sources, a unique feature on the market.
Gaschema has developed a special tanker truck for loading large systems, equipped with an on-board skid, which allows the system to be pressurized with CO2 in the gaseous phase and then loaded with the liquid phase in a single operation. For maintenance on R744 plants, Gaschema has fitted a dedicated cylinder, equipped with a two-phase valve, which allows both the liquid and gaseous phase to be dispensed from the same package according to the operator’s needs.
| Composition | Purity | Impurities (ppmv) | Supply mode | Capacity (l) | Contents (kg |
| CO2 | ≥ 99.9 % | H2O ≥ 10 ppm Incondensable ≥ 5 ppm | Tanker truck | ≅9800 l | ≅7000 kg |
| Cylinder bundle* | 16 x 40 l | 480 kg | |||
| Steel cylinder with two-phase valve | 40 l | 30 kg | |||
| Steel cylinder with two-phase valve | 27 l | 20 kg | |||
| * 16 cylinders 40 l (640 l) | |||||
| Degree of filling: 0.75kg/l Valve connection: UNI 11144-2 ex UNI 4406 |
| Chemical and physical properties | |
| Physical state: | Liquefied gas |
| Molecular weight: | 44 g/mol |
| Melting point: | -78.5 °C |
| Boiling point (at 1.013 bar): | -56.6 °C |
| Critical temperature: | 31 °C |
| Critical pressure: | 73.8 bar |
| Relative density, gas (*): | 1.52 (air=1) |
| Relative density, liquid: | 0.82 (water=1) |
| Vapour pressure at 20°C: | 57.3 bar |
| Appearance/colour: | Colourless gas |
| Odour: | none |
| Safety classification (ASHRAE 34) | A1 |
| (*) at 1.013 bar and 21.1 °C |