Removal of SO₂ by Activated Carbon Fibre Impregnated with Transition Metals

Abstract

Phenolic resin based activated carbon fibres (ACF) impregnated with oxides of various transition metals were investigated for the catalytic oxidation of SO2 into H2SO4. Oxidation was carried out in the packed bed tubular reactor in the presence of O2 and H2O. The activity of the various metals impregnated on ACF was observed to be in the order, Cu>Ni>Co>Cr. It was found that the metal oxides were dispersed as monolayer on ACF up to ∼5% (w/w) loading, beyond which crystallites formation occurred. A kinetic mechanism for the catalytic oxidation of SO2 into H2SO4 was proposed and incorporated in a transport model developed to explain the experimental breakthrough data.

Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies

“…This phenomenon is probably caused by two factors: pore-blocking being a result of metals and carbon matrix interaction and the generation of a large number of the surface oxygen complexes. Other authors had reported such behavior previously in similar studies (Gaur et al, 2007;Goscianska et al, 2012;Mondal et al, 2009). Micropore surface area was also decreased, confirming the metalloading on micropores.…”

Development of surface functionalized activated carbon fiber for control of NO and particulate matter

“…In these studies, the ACF samples were subjected to significantly larger temperature (∼1000 • C) during processing than that in the present study. However, similar to the present case, no deterioration of the surface of the fiber was observed [24].…”

Various Impregnation Methods Used for the Surface Modification of the Adsorbent: A Review

“…Through the process of impregnation the carbonaceous materials which are unstable may be provided support [23]. The impregnated materials have the advantages that regeneration is not necessary during oxidation [31]. The stability of the impregnated materials increases and provides higher surface area necessary for removing the pollutants [32].…”