ALKALI CATALYTIC GASIFICATION OF PHENOLIC WASTEWATER IN SUPERCRITICAL WATER

The performance of supercritical water gasification (SWG) was investigated for the phenolic wastewater treatment at 803-953 K, 24-40 MPa and residence time of 110-140 s. The effects of pressure, residence time, temperature, catalyst on gasification efficiency were studied. The results indicated that pressure change had no significant influence on gasification efficiency. Higher temperature and longer residence time enhanced gasification efficiency, and lower temperature favoured the production of H-2. The carbon gasification ratio and hydrogen gasification ratio were up to 98 and 138% at 953 K, 140 s and 300 mg/l KOH, respectively, which demonstrated that phenol can be completely gasified in SCW.