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High performance removal of methyl mercaptan on metal modified activated carbon
Qiang Liu,Ming Ke,Pei Yu,Feng Liu,Haiqiang Hu,Changchun Li 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.1
A series of coconut shell activated carbon catalysts, modified by metal oxides, were prepared by an ultrasound- assisted incipient wetness method for the removal of methyl mercaptan (CH3SH). The catalysts were investigated using XRD, BET, XPS, TEM and TA.The results showed that the catalyst combined with 2wt% Fe loading and iron (Fe) : copper (Cu) (mole ratio) 10 : 3, and calcination at 300 oC had a superior removal efficiency. The high activity could be attributed to the generation of highly dispersed Fe-Cu nanocomposites. The results revealed that calcination temperature not only influenced the chemical states and nanocomposite size of iron and copper, but also affected the pore structures of the catalysts. Compared with Fe/AC, the interaction between the iron and copper oxides resulted in smaller nanoparticles and high dispersion for Fe-Cu/AC. Product analysis results suggested dimethyl disulfide, metal methanesulfonates and methyl thiolates were the oxidation products which adsorbed on the activated carbon.