LPG Plants


Liquefied Petroleum Gas (LPG), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases and are mainly used as fuel in heating appliances, cooking equipment, and vehicles. Mechanical refrigeration is the typical method to remove hydrocarbons and generally results in 30-50% propane recovery, 60-70% butane recovery and 85%+ gasoline recovery. Propane is used as a fuel gas, refrigerant (R290) and aerosol propellant. Butane is mainly used for gasoline blending, fuel gas,or as a feedstock for the manufacture of ethylene and butadiene. Isobutane is mainly used by refineries to enhance the octane content of motor gasoline.

Typical characteristics of a mechanical refrigeration LPG Plant includes some of the following:

  • Used when deep ethane or deep propane recovery is not desirable or in remote locations where a liquid pipeline is not available
  • Inexpensive compared to higher liquids recovery plants
  • Uses ethylene glycol injection for hydrate inhibition, instead of more expensive molecular sieve system
  • Limited pressure drop on the gas stream so no residual compression is needed
  • Carbon steel metallurgy
  • Has a higher calorific value than Refinery’s LPG and hence gives more value and better revenue
  • Liquids are condensed out of the gas stream through the use of a propane or Freon refrigeration system. No turbo expander is used. No large change in the gas pressure is taken
  • Often used for dew point control
  • Vaporizes at atmospheric temperature and pressure
  • Its homogeneous composition results in more efficient combustion
  • No Impurities like H2S, carbon dioxide, traces of oxides of nitrogen = lower corrosion
  • Customer-friendly fuel as it is easy to transport, store and use