Fig. 7From: Performance assessment of activated carbon thermally modified with iron in the desulfurization of biogas in a static batch system supported by headspace gas chromatography(a) GC chromatogram of the three-component gaseous standard mixture plus water from room moisture and their retention times. The inset shows the hydrogen sulfide peak. (b) Decrease in the area ratio evidencing the high capacity of H2S adsorption on studied ACsBack to article page