Physicochemical characteristics and desulphurization activity of pyrolusite-blended activated coke

The physicochemical properties of prepared activated coke (AC) were characterized by BET, Fourier-Transform Infrared Spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The results indicated that the blended pyrolusite had a slight effect on the structural properties of AC, while the oxygenated functional groups on AC were increased and MnO 2 and Fe 2 O 3 in pyrolusite were reduced to MnO and Fe on the AC-P samples, respectively.

All the AC-P samples significantly improved the removal of SO 2 , with the highest sulphur capacity (153 mg/g) for the AC blended with 8 wt% pyrolusite, which was 57.7% higher than that of the blank activated cock. This could be mainly attributed to the change in surface chemical properties of the AC-P samples and the active catalytic components in pyrolusite for the catalytic oxidation of SO 2 in desulphurization process.