Propane and butane belong to a group of hydrocarbon gases with three or four atoms of carbon in the molecule. They are made during an oil processing.
Liquefied propane-butane is a colourless and volatile liquid with a specific smell. When the pressure is normal (atmospheric) and a temperature also, propane-butane is a gas mixture but when the pressure is higher the gaseous form changes to a liquid form and its volume is 260x bigger. This is why it is possible to storage a giant thermal capacity in a quite small container.
Propane-butane is a mixture of propane and butane. They both are not poisonous - an accidental drip evaporates and does not pollute groundwater. Emission characteristic of both products is comparable with natural gas and in some characteristic they are better.
|Propane-butane - features||Scale units||Propane||Butane|
|Density at 2000C||Kg/m3||502||579|
|Melting point when pressure 101,08 kPa||oC||-189||-135|
|BP when pressure 101,08 kPa||oC||-42,6||-0,6|
|Gross calorific value||KJ/kg||50,3||49,56|
|Density when 101,08 kPa||Kg/m3||2,019||2,703|
|Evaporating warmth when BP and pressure 101,08 kPa||KJ/kg||444,057||387,79|
|Gross calorific value when 00C, 101,08 kPa||MJ/kg||100,986||133,97|
|Calorific value when 00C, 101,08 kPa||MJ/m3||92,989||123,76|
|Lower limit of explosiveness with the air||%||2,1||1,5|
|Upper limit of explosiveness with the air||%||10,1||8,4|