동담지 모더나이트상에서 일산화질소의 환원

The Reduction of Nitrogen Oxide on Copper Loaded Mordenite

  모더나이트에 수용액 함침으로 동을 탐지하고 500℃에서 수소/산소로 환원ㆍ산화처리하여 촉매를 제조하고, CH₄ 또는 CO에 의한 NO의 환원반응을 실시하였다. ESR, CO-TPR를 이용하여 촉매에 담지된 동의특성을 분석한 결과, 환원성이 다른 두 종 이상의 CuO가 존재하였다. NO의 환원에 대한 촉매 활성에서 최대 활성을 가지는 CH₄/NO와 CO/NO 몰비 그리고 동함량이 존재하였다.

  Copper was loaded on mordenite by impregnation of cupric nitrate solution, which was followed by redox treatment with H₂/O₂ at 500℃. For copper loaded mordenites the reduction of NO by methane or carbon monoxide was carried out. Copper loaded mordenite was studied to know the behavior and reducibility of copper with ESR and CO-TPR. Two or more kinds of CuO with different reducibility were distributed over mordenite. The catalytic activity of NO reduction increased with the mole ratio of CH₄/NO or CO/NO and with copper content indicating a maximum activity.