| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 봄 (04/25 ~ 04/27, 창원컨벤션센터) |
| 권호 |
24권 1호, p.882 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
La2O2CO3 phase transformation in La2O2CO3/ZnO composite materials as a function of La/Zn ratios: The stability and crystallinity of the La2O2CO3 phases |
| 초록 |
La2O2CO3/ZnO composite materials have been used as a catalyst for CO2-involving chemical reactions and La2O2CO3 phases are an important factor to influence on catalyst performance. In this study, we prepared La2O2CO3/ZnO composite materials by two different methods – precipitation (PLZ) and ethylene glycol combustion (ELZ) – as functions of La/Zn ratios and calcination temperatures to investigate the formation of La2O2CO3 phase in the composite materials. The calcination temperature was not an crucial variable to control the La2O2CO3 phase. However, in both series of the composite materials, the La2O2CO3 phase was changed depending on the La/Zn ratio. Consequently, the increase in the La/Zn ratio of the composite materials induced the crystallinity of La2O2CO3 phase and the formation of hexagonal phase was preferred under the high crystalline La2O2CO3 structure. The CO2 release from the hexagonal structure occurred at the higher temperatures than that from the monoclinic phase, which prove that the hexagonal phase was more stable than the monoclinic. |
| 저자 |
우홍안1, Nguyen Phu Huy1, Youg Men2, 신은우1
|
| 소속 |
1울산대, 2Shanghai Univ. of Engineering and Science / College of Chemistry and Chemical Engineering |
| 키워드 |
촉매 및 반응공학 |
| E-Mail |
|
| 원문파일 |
초록 보기 |
