What's the difference between lpg and cng?
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Answer:
I suppose, after reading Tonnee's post that: LPG= Liquified Petrolum Gass. CNG= Compressed Natural Gass. Main difference is their compossition. LPG -> Is obtained at the refineries from crude Oil distillation, Cracking or directly from Crude emanations. Its composition is a mixture of Propane and Butane with an upper calorific power of around 22000 Kcal/m³. CNG -> Extracted from gass wells. Its a mixture of several gasses, with Methane as the main one. Its upper calorific power runs around 9000 to 11000 Kcal/m³. CNG is cheaper and the extraction proccess cheaper, simpler and a lot more echological than the one required for LPG. As it can bee easily seen from their calorific powers, LPG is almost two times more powerful than CNG. Regards
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Other answers
l P G or liquified petroleum gas (Propane) is stored and transferred as a liquid. It is then vaporized ( it boils ) and is burned or newer systems have direct liquid injection as in new cars and trucks. C N G is compressed natural gas taking vapor and using a compressor is stored in a cylinder like a welding tank. As far as I know propane is by far the more practical fuel and packs a lot bigger bang or octane. I'm not an expert but this is as far as I can answer.
Tonnee
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