Efficient acid gas removal using membrane systems—Part 2

A number of methods are available for the removal of acid gases. However, membrane-based systems offer some clear advantages and opportunities for the efficient removal of high fractions of acid gases from these fields. In this article, the authors focus on the use of membrane technologies to make a large bulk cut of the acid gases, as well as to remove some mercaptans from raw natural gas. Part 1 of this article addressed membrane separation and acid gas removal. Part 2 discusses hybrid membrane/amine systems, in which the amine process is used to perform the final purification. Membrane packaging. Both spiral-wound and hollow-fiber membranes are packaged in elements (also called modules