ZnO-decorated MWCNTs as solvent free nano-scrubber for efficient H2S removal

Abstract The present work was demonstrated to develop a solvent-free scrubber like zinc oxide-decorated multi-wall carbon nanotubes (ZnO-MWCNTs) to capture H 2 S at the ambient atmospheric condition in a laboratory scrubber set up. The resultant zinc sulfide-decorated multi-wall carbon nanotubes (ZnS-MWCNTs) is characterized by analytical techniques indicating facile conversion of ZnO to ZnS on the surface of MWCNTs. Surprisingly, synergistic effect of ZnO and MWCNTs indicates high H 2 S adsorption capacity of ZnO-MWCNTs at ambient temperature. Further, desulfurization performance in a realistic condition was employed using a bench-scale fixed bed reactor and seen that the ZnO-MWCNTs material showed the highest value of H 2 S removal (98%). Most importantly, regeneration process was developed for necessitates conversion of ZnS to ZnO by chemical method.