MACRORETICULAR ION EXCHANGE RESINS AS HYDROGEN SULFIDE SORBENTS

Dry gas streams containing low volume percentages of H2S (0.5 to 4.0%) may be treated dynamically for H2S removal using Amberlyst XN-1007 or Amberlyst A-27, macroreticular quaternary ammonium anion exchange resins, operated dry in the chloride form under ambient conditions. Increased H2S capacities are realized by conducting the adsorption in a pressurized system. Essentially complete hydrogen sulfide removal is achieved in either instance, hydrogen sulfide leakage being less than 0.01 volume %. When the resin has become exhausted, regeneration is accomplished thermally, using a slow nitrogen purge which accelerates the release of H2S. The sorption operation is nonsensitive to CO2 and does not introduce moisture into the gas stream that has been treated. © 1968, American Chemical Society. All rights reserved.