| abstract |
PURPOSE: To adsorb and remove nitrogen oxides even at low concn. efficiently by allowing a gas contg. nitrogen oxides to contact with an adsorbent prepd. by depositing a specified Cu salt to a carrier comprising zeolite. n CONSTITUTION: Natural or synthetic zeolite is used as carrier of an adsorbent for removing nitrogen oxides discharged from several tunnels at low concn. At least one kind of Cu salt among Cu chloride, complex salt of Cu chloride, ammine complex salt of Cu chloride, is deposited to the carrier. An adsorbent obtd. by this method can remove nitrogen oxides in a ventillation gas from tunnels, etc., even if the concn. of the nitrogen oxides is so low as about 5ppm. n COPYRIGHT: (C)1989,JPO&Japio |