INTER MATERIAL 21世紀に活躍するベンチャー企業

Removal Technologies of Hazardous Gas by Catalyst-Loaded Ceramic Filter
■著者
Material Testing Team、Korea Testing Lab　Hee Soo Lee　他

■要約
Porous filter was manufactured using cordierite powder, and it was loaded with catalyst such as V 2 O 5 , V 2 O5 /TiO 2 , LaCoO3 , noble metals, and transition metals by vacuum impregnation method. The removal efficiency of NOx, VOCs, and the simultaneous removal efficiency of NOx/SOx were measured by passing NO, SO 2 , and VOCs through catalystloaded ceramic filter. The cordierite porous filter had the apparent porosity of 61.6%, the compressive strength of 12.3 MPa and the pressure drop of 1500 Pa at the face velocity of 5cm/sec, at 400℃. NOx removal efficiency of only V 2 O 5loaded on cordierite filter was 80%, and was improved up to 90% by the acid treatment (which increased specific surface area of filter elements);then this result is equal to the removal efficiency of the commercial V 2 O 5 /TiO 2catalyst, which was used at SCR (Selective Catalytic Reduction) process. NOx & SOx simultaneous removal efficiency of LaCoO3loaded on porous cordierite filter was very good. The removal efficiency was about 98% for NOx and over 90% for SOx between 600℃ and 650℃. Pt had the highest activity for catalytic oxidation and could remove more than 90% of toluene at 250℃. Among transition metals, Cu showed the highest removal efficiency for VOCs,over 90% at 370℃.cordierite lter, catalyst coating,hazardous gas, and simultaneous removal