Author/Authors :
louhichi, s. scientific research departmen - tunisian chemical group, Gabes, Tunisia , louhichi, s. university of sfax - faculty of sciences of sfax - laboratory of sciences of materials and environment, Sfax, Tunisia , ghorbel, a. faculty of sciences of monastir - laboratory of heterocyclic chemistry, natural products and reactivity, Tunisia , takfaoui, a. université mohammed premier - faculté des sciences - lcae, Oujda, Morocco , chekir, h. scientific research department - tunisian chemical group, Gabes, Tunisia , trabelsi, n. scientific research department - tunisian chemical group, Gabes, Tunisia , khemakhem, s. university of sfax - faculty of sciences of sfax - laboratory of sciences of materials and environment, Sfax, Tunisia
Abstract :
Activated carbon has been used for many years for the adsorption of gases from natural gas streams, carbon dioxide, and sewage vents. However, in many agricultural countries, agricultural by-products are often the problem of environmental pollution and affect human health. H2S in biogas is very toxic and corrode the equipment. Therefore, there is a critical need for expanding research involving removal of H2S from biogas. Some methods were studied so far: adsorption, absorption, permeation through membrane. In this theme, we did recycle of activated carbon used for waste water treatment’s application .Four alkaline solution based KOH with different ratios were applied to impregnate activated carbon. The hydrogen sulfide used for application was taken from a purge at the chimney of phosphoric units. The molar ration of H₂S adsorbed to KOH is approximately 1 (mole H₂S /mole-MOH). The dominant reaction may be expressed as H₂S + MOH→ MHS + H₂O. Alkalines activated carbons were analyzed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and BET surface area analysis.
Keywords :
Alkaline activated carbon , Hydrogen sulfide , Adsorption , KOH
