| 摘要 |
PURPOSE:To decompose harmful ammonia to harmless nitrogen without always heating an adsorbent to high temp. and generating a harmful byproduct by using an adsorbent composed of crystalline silicate having a specific compsn. on which copper is supported. CONSTITUTION:An ammonia adsorbing and decomposing agent having a chemical compsn. represented by (1+ or -0.6)R2O.-[aM2O3.bAl2O3.cMeO].ySiO2 (wherein R is an alkali metal ion and/or hydrogen ion, M is group VIII elements or rare earth elements, Me is an alkaline earth element, (a), (b) and (c) are 0 or more, (a+b) is 1, y/c is 12 and y is >12) in a dehydrated state and containing copper supported on crystalline silicate or laminar composite crystalline silicate is used. Ammonia is adsorbed by this adsorbing and decomposing agent from ammonia-containing gas at low temp. and removed and, when adsorbed ammonia is heated and desorbed, ammonia is decomposed to harmless nitrogen. |
