Maintaining the selective removal of H2S from a variably flowing gas stream containing H2S and CO2

摘要

A method and apparatus for selectively removing H2S from a gas stream containing H2S and CO2 and having a variable flow rate. The absorption system is divided into at least two absorption columns which are connected in parallel and contain at least two individual absorption volumes connected in series in which the gas and absorbent solution can countercurrently contact each other. The absorption system has means to control the passage of the fluid streams to each absorption column and the absorbent solution through the individual absorption volumes.