Liquid Natural Gas
LNG is a clear, colourless and non-toxic liquid which forms when natural gas is cooled to -162ºC (-260ºF). The cooling process shrinks the volume of the gas 600 times, making it easier and safer to store and ship. In its liquid state, LNG will not ignite.
When LNG reaches its destination, it is turned back into a gas at regasification plants. It is then piped to homes, businesses and industries where it is burnt for heat or to generate electricity. LNG is now also emerging as a cost-competitive and cleaner fuel, especially for shipping heavy-duty road transport.
Liquefied Petroleum Gas
LPG – Liquefied Petroleum Gas – describes flammable hydrocarbon gases including propane, butane and mixtures of these gases.
LPG, liquefied through pressurisation, comes from natural gas processing and oil refining.
LPG is used as heating, cooking and auto fuel.
In different countries, what is supplied can be propane, butane or propane-butane blends.
| LPG Attributes | Propane | Butane |
| Chemical Formula | C3H8 | C4H10 |
| Energy Content: MJ/m3 | 95.8 | 111.4 |
| Energy Content: MJ/kg | 49.58 | 47.39 |
| Energy Content: MJ/L | 25.3 | 27.5 |
| Boiling Temp: Cº | -42 | -0.4 |
| Pressure @ 21ºC: kPa | 858.7 | 215.1 |
| Flame Temp: Cº | 1967 | 1970 |
| Expansion: m3/L | 0.270 | 0.235 |
| Gas Volume: m3/kg | 0.540 | 0.405 |
| Relative Density: H2O | 0.51 | 0.58 |
| Relative Density: air | 1.53 | 2.00 |
| L per kg | 1.96 | 1.724 |
| kg per L | 0.51 | 0.58 |
| Specific Gravity @ 25ºC | 1.55 | 2.07 |
| Density @ 15ºC: kg/m3 | 1.899 | 2.544 |