Sulfur Species Adsorption on Improved Synthesized Zeolite

In recent years, increasing attention has been focused on the desulfurization of transportationfuels due to regulations for environmental protection.The adsorption method selectively removes sulfur compounds utilizing adsorbents at ambienttemperature and pressure, in a much simplified way compared to the hydrotreating and other methods.Adsorption of the organic sulfur compounds propyle mercaptane, dimethyle disulfide, thiophene andsulfone dibenzothiophene in organic model solutions of desulfurizated fuels was studied by a batchmethod at 39 °C using metal-impregnated X-zeolites. Although 13X-zeolite or its acid-treated materialrarely adsorbed the organic sulfur compounds, NaX-zeolites impregnated with Ag+, Zn2+, and Ce10 ions.Impregnated with Ag+ ions showed markedly high adsorptive capacities for propyle mercaptane,dimethyle disulfide, thiophene and sulfone dibenzothiophene. The sulfur uptake increased in the orderCeX-zeolite < ZnX-zeolite < AgX-zeolite for all the organic sulfur compounds.AgX-zeolite exhibits higher adsorptive selectivity for SDBT than others, indicating that AgX-zeolite is amore effective adsorbent to remove sulfur compounds from transportation fuels.

کلیدواژه ها:

Adsorption ، Sulfur ، Zeolite