| 摘要 |
<p>The present invention discloses a method of selective catalytic reduction of nitrogen oxides in exhaust gas, said method comprising:
at least partially contacting said exhaust gases with an article comprising an organic-free, iron containing zeolite Beta having a molar silica-to-alumina ratio (SAR) ranging from 5 to 20,
wherein said iron is present in an amount of at least 0.5 weight percent.</p> |
