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

• Published in: Materials letters 2019-01, Vol.234, p.172-174
• Main Authors: Singh, Amardeep, Pandey, Vibhav, Bagai, Rashmi, Kumar, Manoj, Christopher, J., Kapur, G.S.
• Format: Article
• Language: English
• Subjects: H2S-scrubber; Multiwall carbon nanotube; Tail gas; ZnO; ZnS
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2018.09.091

[Display omitted] •Solvent-free nano-scrubber like ZnO-MWCNTs was demonstrated to capture H2S at ambient condition.•Facile conversion of ZnO to ZnS on MWCNTs is characterized by various analytical techniques.•ZnO-MWCNTs showed high amount of H2S removal compared to MWCNTs and ZnO due to synergistic effect.•Regeneration process was developed to necessitate conversion of ZnS to ZnO by chemical method. The present work was demonstrated to develop a solvent-free scrubber like zinc oxide-decorated multi-wall carbon nanotubes (ZnO-MWCNTs) to capture H2S 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 H2S 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 H2S removal (98%). Most importantly, regeneration process was developed for necessitates conversion of ZnS to ZnO by chemical method.