Abstract
Two activated carbons have been prepared by chemical activation of deinking paper sludge with K2CO3, with further carbonization in N2 (AC-N2) or CO2 (AC-CO2) and characterized in terms of proximate analyses, adsorption/desorption of N2, skeletal and bulk pycnometry, acid/base and Boehm’s titrations, X-ray diffraction and scanning electron microscopy–energy dispersive spectroscopy (SEM-EDS) analyses. A commercial activated carbon (AC-COM) was subjected to the same characterization program for comparison purposes. Surface area/porosity followed the trend: AC-CO2 AC-N2 ≫ AC-COM, due to the presence of CaCO3, which is a basic salt, in the carbons prepared. The three adsorbents were tested in the adsorption of SO2, where a proper selection of carbon particle size that maximized pore diffusion control led to a ...
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