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LPG is composed mainly of propane and butane, while natural gas is composed of the lighter methane and ethane. LPG, vaporised and at atmospheric pressure, has a higher calorific value (46 MJ/m 3 equivalent to 12.8 kWh/m 3 ) than natural gas (methane) (38 MJ/m 3 equivalent to 10.6 kWh/m 3 ), which means that LPG cannot simply be substituted for ...
When these cargo tanks are designed to carry LPG (at −50 °C), the tank is constructed of fine-grained low-carbon manganese steel or even stainless steel as seen in the Maersk J class Ships. [13] The hold space (void space) in this design is normally filled with dry inert gas or Nitrogen but may be ventilated with air during a ballast or gas ...
The propane and butane streams are chilled, liquefied and stored on Mossmorran site within double wall insulated, partly buried tanks; the gasoline is stored in floating-roof tanks. These liquids are then transported as required via pipeline to the marine terminal at Braefoot Bay on the Firth of Forth for loading onto ships for export. [6]
Autogas or LPG is liquefied petroleum gas (LPG) used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane. [1] Autogas is widely used as a "green" fuel, as its use reduces CO 2 exhaust emissions by around 15% compared to petrol. [2]
Several types of valve connections for propane, butane, and LPG containers exist for transport and storage, sometimes with overlapping usage and applications, and there are major differences in usage between different countries. Even within a single country more than one type can be in use for a specific application.
Compressed natural gas (CNG) carrier ships are those designed for transportation of natural gas under high pressure. [1] CNG carrier technology relies on high pressure, typically over 250 bar (2900 psi ), to increase the density of the gas, but it is still 2.4 times less than that of LNG (426 kg/m 3 ). [ 2 ]
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