LPG is liquefied petroleum gas, which is produced when refining
crude oil or volatilized from the process of oil or natural gas
exploitation. LPG is a mixture of oil and natural gas formed under
appropriate pressure and exists as a liquid at room temperature.
LPG (Liquefied Petroleum Gas) is widely used as alternative fuel
for cars, but is also suitable as a chemical feedstock. It consists
of propane and butane (C3/C4).
For the recovery of LPG/C3+ the Engineering Division offer an
absorber process, which guarantees recovery rates as high as 99.9
%, while at the same time featuring low specific energy
consumption. Furthermore the tolerable CO2 content of the feed gas
is higher than for conventional expander processes.
To achieve high C3 recovery rates, Rongteng implements an absorber
column upstream of the deethanizer. Here the feed gas is scrubbed
by using a light hydrocarbon reflux coming from the top of the
deethanizer. LPG is separated from the heavier hydrocarbons
down-stream of the deethanizer using a destillation column.