A Study of the Removal of Minor Amounts of HS from Natural Gas by Activated Carbon

Abstract

Studies have been made of the removal of minor amounts of H 2 S from natural gas by activated carbon. The surface alkalinity of the carbon had a considerable effect on the H 2 S capacity, although this was not permanent. Thus, when the carbon surface became neutral, the H 2 S content remained constant after the initial cycles of the purification/regeneration operation. The presence of water in natural gas was found to be critical for the use of activated carbon as a means of sweetening natural gas. However, although it enhanced the H 2 S capacity of the carbon, it made regeneration of the latter very difficult.