| 摘要 |
PURPOSE:To prevent a waste gas treating catalyst from being poisoned and maintain the catalytic function for a long period by removing a catalyst poison by previously introducing a waste gas into a highly activated alumina-filled layer. CONSTITUTION:Previous to cleaning of a catalyst poison-containing waste gas by bringing the gas into contact with a catalyst, the waste gas is introduced into a highly activated alumina-filled layer to remove the catalyst poison. The conditions of the pretreatment using the highly activated alumina-filled layer should be changed according to the kinds of harmful materials in the waste gas and their concentration as well as the kinds of catalyst poisons in the waste gas and their concentration and should be determined after the consideration of these factors at the time of pretreatment. Since the catalyst poisons are removed efficiently as compared to a conventional method, a waste gas treatment catalyst is prevented from being poisoned and its catalytic function can last for a long period. Further, tar-like materials can be removed efficiently, therefore, deterioration of the catalyst and damage of an apparatus due to combustion of the materials are prevented. |
