Study on Adsorption Property of Different Adsorbents for Dibenzothiophenic Sulfur in Simulated Diesel

摘要

It's more difficult to remove dibenzothiophenic sulfur in diesel. Adsorption performance of self-made metal-organic framework on Cu-BTC, MCM-22, alumina and silica gel for 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene(4,6-DMDBT) in simulated diesel at room temperature were investigated. The results show, BET surface area of Cu-BTC is up to 1501m~2/g. When the initial concentration of sulfur in 4-MDBT is 46.80mg S/L, the static equilibrium adsorption capacity of Cu-BTC for 4-MDBT in simulated diesel is 2.40mg S/gads, which is about 20 times than that of other adsorbents. When the initial concentration of sulfur in 4,6-DMDBT is 48.47mg S/L, the equilibrium adsorption capacity of Cu-BTC for 4,6-DMDBT in simulated diesel is 2.04mg S/g_(ads). The adsorption isotherms of Cu-BTC for 4-MDBT and 4, 6-DMDBT indicate that when the equilibrium concentration of sulfur is 50mg S/L, the adsorption performance of Cu-BTC for 4-MDBT and 4,6-DMDBT following the order is 4-MDBT>4,6-DMDBT.