| 摘要 |
<p>PROBLEM TO BE SOLVED: To adsorb and remove low concn. NOx with an adsorbent having satisfactory adsorbing performance over a long period of time by removing SOx from gas contg. SOx and NOx and then bringing the gas into contact with the adsorbent for NOx. SOLUTION: Gas contg. NOx and SOx from a road tunnel, etc., is brought into contact with an adsorbent for NOx to remove NOx from the gas. The adsorbent contains an element such as Pt or Pd and an element such as Mn or Ni. Before this contact, SOx is removed from the gas with an adsorbent for SOx contg. activated carbon, a transition metal, an alkali metal, etc. Low concn. NOx can be adsorbed and removed.</p> |
