| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a urea SCR (Selective Catalytic Reduction) catalyst and a post-treatment system for exhaust gas capable of removing NOx exhausted from an engine at low temperature. <P>SOLUTION: The urea SCR catalyst for reducing NOx in exhaust gas with ammonia has Al ions introduced into an iron silicate skeleton. <P>COPYRIGHT: (C)2013,JPO&INPIT |
