<；P>；PROBLEM TO BE SOLVED: To transfer harmful acetaldehyde being the main component and being one kind of a VOC to less harmful acetic acid and to adsorb and remove it though a conventional platinum-based catalyst has the problem that its operation temperature is high, so that it cannot be applied to an air conditioner, an air purifier, etc., and a photocatalyst has the problem that its deodorization speed is slower than that of an adsorbent etc., that a light source is required, so that its sizes cannot be reduced and costs are high, and that impact resistance is low. <；P>；SOLUTION: The deodorizer is composed of the adsorbent 4 having a physical adsorption and and an oxide 5 containing cobalt and having a catalytic action. An odor occurring in a living space can be adsorbed and removed with the adsorbent 4 having the physical adsorption. In particular, the harmful acetaldehyde is transferred to the acetic acid at normal temperature with an oxide catalyst containing cobalt and adsorbed and removed with the adsorbent. <；P>；COPYRIGHT: (C)2007,JPO&INPIT
