Kinetic Studies on Enhanced Mercury Adsorption in Zeolite Nay and Waste Fcc Catalyst

摘要

The mercury (II) removal was studied using two adsorbents: waste FCC Catalyst and NaY zeolite, those materials were characterized under test such as TGA, XRD, IR, immersion enthalpy and N2 adsorption isotherms. The zeolite superficial area is 773 m~2/g and that of the FCC catalyst is 135 m~2/g. The maximum mercury adsorption capacity was 1.8561mg/g for the FCC catalyst and 2.6845 mg/g for the zeolite. The equilibrium isotherms were described with the Langmuir and Freundlich linear models. Besides, the kinetics was described with the Lagergren and Pseudo-second order, the latter fit better in the experiments. After the use of the adsorbents, they were regenerated, acquiring their superficial areas as 675 and 87 m~2/g for the NaY zeolite and the FCC catalyst, respectively.