| 摘要 |
PURPOSE:A waste gas purifying body of high pruification efficiency obtained by constituted it of an agitating layer having porous three-dimensional network structure and a reaction layer in which activated alumina and noble metal catalysts are carried on the surfaces of similar porous ceramics. CONSTITUTION:A purifying body 9 which purifies the waste gas contg. malodor and CO produced at the igniting and putting out of a petroleum heater or the like is constituted of a reaction layer 1 and an agitating layer 2 of a disc shape. The reaction layer 1 is a ceramic porous grating 3 provided with an alpha-alumina active layer 4 of 0.25-0.6 bulk density obtained by sticking ceramic magma such as alpha- alumina on soft polyurethane foam of 1-7mm. maximum cell diameters, sintering this at 1,000-1,800 deg.C and removing the foam by carbonizing. An activated alumina layer of 3-30wt% based on the weight of the porous body is coated on the grating surface of this porous body and catalysts 5 such as platinum are carried thereon. The agitating layer 2 is constituted of the similar ceramic porous body. The malodorous gas is passed through the agitating layer and is thereby agitated, after which it is passed through the reaction layer 1, whereby the malodor and CO components are purified and removed at high rate of removal. |
