화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.17, No.2, 142-149, June, 2011
Export Citation
AlCoPd (1/1/0.05) 및 AlCoFe (1/1/2)의 혼합금속산화물 촉매에 의한 NO, N2O 및 O2의 흡탈착 특성 연구
Adsorption-Desorption Characteristics of NO, N2O and O2 over Mixed Oxide Catalysts of AlCoPd (1/1/0.05) and AlCoFe (1/1/2)
한아름, 황영애, 장길상1, †
  • 상명대학교 화학과, 110-743 서울시 종로구 홍지동 7
  • 1상명대학교 공업화학과, 110-743 서울시 종로구 홍지동 7
A-Reum Han, Young-ae Hwang, and Kil Sang Chang1, †
  • Department of Chemistry, Sangmyung University, 7 Hongji-dong, Jongrho-ku, Seoul 110-743, Korea
  • 1Department of Industrial Chemistry, Sangmyung University, 7 Hongji-dong, Jongrho-ku, Seoul 110-743, Korea
E-mail:
초록
혼합금속산화물인 AlCoPd (1/1/0.05) 및 AlCoFe (1/1/2) 촉매의 Lean NOx Trap (LNT) 적용을 위하여 NO 및 N2O에 대한 흡착 및 탈착 특성을 살펴보았다. 이들은 NO 및 N2O에 대해 산화 과정 없이도 NO를 잘 흡착하는 성능을 나타냈다. 산소가 공존하는 복합 성분의 흡착에서는 흡착량이 많이 떨어졌지만 NO의 경우 산소 대비 높은 선택성과 흡착능을 유지한 반면 N2O의 선택성과 흡착능은 급격히 떨어지는 양상을 나타냈다. 또한 TPD로 살펴본 탈착 특성에서는 고온 영역에서 NO 및 N2O 성분이 분해되며 생성된 산소 성분 등이 높은 온도에서도 촉매에 강하게 결합되어 있는 것으로 파악되었다.
The adsorption and desorption behaviors of NO and N2O over two mixed oxide catalysts, AlCoPd (1/1/0.05) and AlCoFe (1/1/2), have been investigated for the lean NOx trap applications. The catalysts showed good adsorption capabilities for NO and N2O without needing oxidation step. The adsorption decreased a lot when they are co-adsorbed with oxygen. While NO kept high adsorbability and selectivity with respect to oxygen, those of N2O decreased sharply. From the TPD results, NO and N2O are considered to decompose into nitrogen and oxygen in the higher temperature range and the oxygen seems to be strongly attached to the catalysts even at high temperature.
Keywords:Greenhouse gas;Lean NOx;Nitrous oxide;Mixed oxide catalyst;Exhaust gas treatment;LNT;NSR
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