The Use of Propane, Propane-Butane, Propylene, MAPP-Gas, Methane and Natural Gas for High Velocity Thermal Spray Coatings
Propane, C3H8, one of the liquefied petroleum gases (LPG) group, a by-product of natural gas processing and petroleum refining. Specific heat capacity – 1.67 KJ/ (Kg*K).
Propylene, C3H6, also known as propene or methyl ethylene, has a slightly lower boiling point than propane and is thus more volatile. Specific heat capacity – 1.5 KJ/ (Kg*K).
Propane-Butane is a mix of propane and butane. In some countries, it is much less expensive and easier to find than pure propane.
“MAPP gas” is a trademarked name, belonging to The Linde Group for a fuel gas based on a stabilized mixture of methylacetylene (propyne) and propadiene. The name comes from the original chemical composition, methylacetylene-propadiene propane. “MAPP gas” is also widely used as a generic name for UN 1060 stabilized methylacetylene-propadiene (unstabilized methylacetylene-propadiene is known as MAPD). In the spring of 2008, the only remaining plant in North America discontinued true MAPP gas production. Current products labeled “MAPP” are, in fact, MAPP substitutes. These versions are stabilized liquefied petroleum gas (LPG) with high levels of propylene.
Methane, CH4, is the main component of natural gas. Specific heat capacity – 2,22 KJ/ (Kg*K).
Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, Specific heat capacity – 2,34 KJ/ (Kg*K).
It is possible to pre-set the AK equipment to work with any of these gases, some of them, like propane-butane or natural gas, will need additional hardware to prepare it properly.
