| 摘要 |
<p>PURPOSE:To recover nitrogen monoxide at high concn. from gas containing nitrogen monoxide at low concn., by using a nitrogen monoxide adsorbent prepared by a method wherein activated carbon and a divalent or trivalent iron salt are mixed in a solvent and the solvent is removed to dry the resulting mixture. CONSTITUTION:After activated carbon and a divalent or trivalent iron salt such as ferrous sulfate, ferrous chloride, ammonium ferrous sulfate, ferric sulfate, ferric chloride or ferric acetate are mixed in a solvent, the solvent is removed and the resulting mixture is dried to prepare a nitrogen monoxide adsorbent. There is no limit in the shape of activated carbon but the particle size thereof is 0.01-50mm, pref., 0.1-5mm. As the solvent, 1-6C alcohol is pref. and the addition amount thereof is 1-1,000cm<3>, pref., 10-100cm<3> per 10g of activated carbon. When the obtained adsorbent is used, NO can be selectively adsorbed from a gaseous mixture containing 30%-1ppm of NO.</p> |
