| 초록 |
To develop a more efficient adsorbent to be used for removing mercaptanes and sulfides from FCC C4 , several activated carbon (AC) based adsorbents were studied. The adsorbents were prepared by impregnating AC with CuCl and PdCl2 using incipient wetness method. In order to evaluate the degree of metal halide impregnation on the AC support, each adsorbent were characterized by examination with N2 adsorption, elemental analysis (EA) and XRF. Three type of AC (C-1, H-1, K-1) were used to analyze the effect of the structural properties such as specific surface are, total pore volume and pore size distribution. The result showed that C-1 is the most effective supported material for FCC C4 adsorbent to remove the sulfur compounds. The experimental adsorption isotherms were compared with Langmuir and Freundlich models. The sulfur removal performance of the prepared adsorbents was tested with FCC C4 at the same condition with FCC refinery process (25℃, 10atm) from the breakthrough experiment. The best adsorbent, PdCl2/AC, has sulfur adsorption capacities of 0.22 and 0.32wt% gs/gads at breakthrough and saturation time, respectively. The saturated adsorbents can be generated with toluene treatment and reactivated. About 50 and 30% of the sulfur adsorption capacity was recovered after regeneration. |
