Abstract
To remove sulfur compounds, such as methyl mercaptan (M.M.), ethyl mercaptan (E.M.), dimethyl disulfide (DMDS) and diethyl disulfide (DEDS) in the fluidized catalytic cracking (FCC) process, various activated carbon (AC)-based sorbents impregnated with alkali and alkaline earth metal were tested in a fixed-bed quartz reactor at 30 °C. The sulfur removal capacities of the AC-based sorbents (e.g., the CaAC, NaAC and KAC series) prepared via impregnation with alkali or alkaline earth metal were more enhanced than those of the pure AC sorbents despite a notable decrease in their surface areas and pore volumes. It was found that the alkali/alkaline earth metal was the adsorption site of the sulfur compound. Moreover, the KAC-10 sorbent showed excellent sulfur removal capacity and regeneration ability.
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