| 简介 |
PROBLEM TO BE SOLVED : To provide a catalyst for burning and removing a carbon-containing substance at low temperature and stably in a long period of time, a process for production of the catalyst, a material having the catalyst carried thereon, and a process for production of the material.
SOLUTION : The catalyst for burning the carbon-containing substance is used for burning/removing the carbon-containing substance contained in exhaust gas from an internal-combustion engine. The material having the catalyst carried thereon is produced by depositing the catalyst for burning the carbon-containing substance on a ceramic base material. The catalyst for burning the carbon-containing substance is produced by conducting a mixing step, a drying step and a firing step. In the mixing step, zeolite other than sodalite is mixed with a source of an alkali metal element and/or a source of an alkaline-earth metal element at a specified ratio in water. In the drying step, a mixed solution prepared in the mixing step is heated to evaporate moisture and produce a solid material. In the firing step, the solid material is fired at 600°C or higher.
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