Amine is an organic compound derived from ammonia by replacement of one or more hydrogen atoms by organic groups. Amine Plants remove Carbon Dioxide (CO2) and/or Hydrogen Sulfide (H2S) from the gas stream by a chemical reaction with amine in the solvent solution. H2S is a colorless, flammable, extremely hazardous gas with a “rotten egg” smell and occurs naturally in crude petroleum and natural gas.
In a reversible reaction the Amine removes CO2 and/or H2S in the absorption section of the plant at high partial pressure and/or relatively ambient, low temperature. High temperature and low pressure in the regeneration section of the plant reverses the reaction so that the CO2 and/or H2S is released from the amine.
Gas Dehydration Process
The purpose of the Gas Dehydration process is to remove dissolved water from wet saturated gas by contacting high concentrated ethylene-glycol (C2H6O2) or “glycol” solution. The rich glycol is then regenerated by atmospheric distillation in the glycol regeneration package.
Mercury Removal Process
Traces of mercury (the chemical element of atomic number 80, a heavy silvery-white metal that is liquid at ordinary temperatures) have to be removed from natural gas and its associated condensate to prevent corrosion in aluminum equipment.
The removal of mercury in the gas-phase is done by:
– Adsorption on sulphur impregnated carbon or alumina carrier
– Molecular Sieve
– Sulphided Metal (Puraspec)