ZnO/SBA-15 composites for mid-temperature removal of H2S: Synthesis, performance and regeneration studies

► ZnO/SBA-15 composites show good performance for removal of H2S. ► The confinement of ZnO into SBA-15 is achieved through two different strategies. ► Enhancement of the sorption properties after first regeneration. ► The sorption properties are maintained upon repeating regeneration cycle.