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Partially halogenated chlorofluorocarbons (HCFCs) are used as refrigerants, propellants or solvents. HCFCs are manmade substances that are chemically stable, non-flammable, odourless and tasteless. They are hydrocarbons whose hydrogen atoms have been partially replaced with the halogens fluorine and chlorine. Compared to CFCs (e.g. R 12 ODP = 1), they are less stable and have both a lower ozone depletion potential (ODP = 0,02-0,06) and a lower direct global warming potential (GWP = 76-12,100). In Europe, HCFCs are not permissible as refrigerants in new plants.
Examples: R 22, R 123, R 124, R 141b, R 142b |
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Characteristics
(R 22)| ODP | 0.055 | | GWP |
12,100 |
| Molecular
weight | 86.47
g/mol | | Boiling
point (1.013 bar) | -40.8
°C | | Critical
temperature | 96.15
°C | | Critical
pressure | 49.88
bar | | Critical
density | 513
kg/m³ | | Vapor
pressure at 25 ºC | 10.44
bar |
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