Abstract
Dynamic adsorption is not suitable to be used to find the adsorption isotherm for H2S removal. It was because the conventional experimental method used grain adsorption for the isotherm calculation. In order to achieve grain adsorption using the fixed bed adsorption test rig, the amount of adsorbent was minimized to create a similar operation compare to grain adsorption, allowing the proper calculation of isotherm parameters. Data analysis showed that Freundlich sorption isotherm can best described the sorption behavior. Thermodynamic study showed that enthalpy change (∆H) and entropy change (∆S) were calculated to be -6.0 kJ/mol and 25.7 J/ mol.K. The sorption was pseudo-second order with activation energy 11.7 kJ/mol and rate constant was between 2.387–4.066 X 10 -6 g/mg.min for 30-70˚C. Breakthrough curve was fitted best by using breakthrough model developed by [1].
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