Fabrication of Cu(BDC)0.5(BDC-NH2)0.5 metal-organic framework for superior H2S removal at room temperature

From MOF-199 Microrods to CuO Nanoparticles for Room-Temperature Desulfurization: Regeneration and Repurposing Spent Adsorbents as Sustainable Approaches

“…The MOF-199 structure collapses after H 2 S interaction and yields covellite (CuS) as the final product . However, in our previous studies, we confirmed covellite in Cu­(BDC) 0.5 (BDC-NH 2 ) 0.5 and not in MOF-199 after H 2 S exposure . In this study, we have opted for a low-temperature thermal regeneration method for activating spent MOF-199 and CuO/Cu 2 O.…”

“…Based on the peak positions, the peaks mainly originated from Cu 2+ and not Cu + as XPS Cu 2+ peaks usually appear at a higher energy . The Cu 2p 3/2 peak was deconvoluted into two contributions at 932.3 (16.5%) and 934.5 eV (83.5%) for Cu + and Cu 2+ sites, respectively. , Multiple peaks located at 947–938 and 958–965 eV were shake-up satellites for Cu 2+ sites. These satellite peaks are due to the p⃗d hybridization occurring when the Cu electronic configuration is unsaturated (d 9 ) and absent in the Cu + oxidation state (d 10 ) (Figure a) .…”

A novel one-step synthesis of Ce/Mn/Fe mixed metal oxide nanocomposites for oxidative removal of hydrogen sulfide at room temperature

“… 34 On the contrary, moisture may decrease the adsorption capacity by competing with the H 2 S adsorption sites. 8,35 Here, we expected the competitive effect of water molecules for the active sites.…”

“…34 On the contrary, moisture may decrease the adsorption capacity by competing with the H 2 S adsorption sites. 8,35 Here, we expected the competitive effect of water molecules for the active sites. The effect of bed loading was studied by varying CeMnFe mass with a xed ow rate of 0.3 L min À1 (Fig.…”

“…Adsorption and thermal oxidation approaches are simpler, economical, and environmentally benign methods for the adsorptive/catalytic removal of H 2 S from waste gas streams. For adsorptive removal of H 2 S, porous adsorbents like activated carbon, 4 modied silica, 5 zeolites, 6 and metal-organic frameworks 7,8 have been reported as efficient materials for the purpose. On the same note, metal oxides could be used as adsorbents at low temperatures and thermal catalysts at elevated temperatures.…”