Gas Treating

Gas treating is the general term given to describe the cleaning of fuel gas or recycle streams in the refinery.

Typical refineries incorporate amine treating and caustic units in this service, to remove hydrogen sulphide and mercaptans. Amine systems utilise either MonoEthanolAmine (MEA) or DiEthanolAmine (DEA). The principal reason for this processing step is to remove sulphur and other impurities from product streams.

For amine treating, the main process equipment requirements are an absorber column and a stripper column. The absorber ensures intimate contact between the incoming stream and the fresh amine cleaning stream. The stripper column then removes the contaminated stream from the cleaned process stream.