| 학회 | 한국화학공학회 |
| 학술대회 | 2008년 봄 (04/23 ~ 04/25, 제주ICC) |
| 권호 | 14권 1호, p.1355 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | In-depth investigation of the synthesis mechanism of novel NO oxidation catalyst Co/KxTi2O5 |
| 초록 | NOx abatement is one of the key problems for lean-burn engines, and there is increasing acceptance of the view that the oxidation of NO to NO2 is an important pre-requisite step for treating emission gases. In the present work, Co/KxTi2O5 catalyst with well-dispersed nano-Co3O4 particles, synthesized by an ion exchange method from K2Ti2O5 precursor, showed extremely high NO oxidation activity and good stability. Morphological changes and microcosmic processes during the course of catalyst preparation were examined using AAS, XRD and SEM-EDX. During the ion exchange of K2Ti2O5 with Co precursor solution, K+ ions were replaced by H+ (H3O+). After calcination at 500oC, a partially collapsed structure was obtained when the exchange was controlled to a certain degree. Fortunately, the Co that precipitated on this collapsed structure formed highly stable nano-particles of Co3O4. Catalytic activity for the NO oxidation was found to be highly dependent on the loading and particle size of Co and K remaining in the KxTi2O5 support. |
| 저자 | 왕 강, 정종식 |
| 소속 | 포항공과대 |
| 키워드 | NO oxidtion; characterization; mechanism; synthesis |
| 원문파일 | 초록 보기 |
