A gas sweetening unit in an oil refinery
a) uses heat only to drive off the hydrogen sulphide from the sour gas
b) uses an amine contactor to absorb the hydrogen sulphide from the sour gas
c) uses an amine contactor to absorb the hydrogen sulphide from the crude oil
d) uses amine solution to absorb the hydrogen sulphide from the gasoline
e) uses heat only to drive off the hydrogen sulphide from the crude oil
Answer: B