Catalytic Combustion of Voc in Air Stream Over Bimetallic Chromium-Copper Supported On Sicl4-Modified H-Zsm-5 Catalyst

The performance of chromium (Cr) and copper (Cu) on silicon tetrachloride modified H-ZSM-5 (SiCI4-Z) catalyst in VOC combustion is reported. H-ZSM-5, modified with SiCl4 at 500°C for 3 h was impregnated with 1.0 wt. % of Cr and 0.5 wt. % of Cu. Performance studies were carried out at GHSV of 3,800 to 32,000 h-1 with 2,000 to 35,000 ppm of VOC. Changes in the activity of Cr-Cui SiCI4-Z were ascribed to extra framework deposits, surface acidity and pore characteristics. Cr-Cu/SiCI4-Z catalyst was more stable to coking, humidity and HCl than Cr-CuiZ. In the combustion of chlorinated VOC, the chlorination of metal species deactivated the catalyst by rendering lower redox ability.