| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 가을 (10/24 ~ 10/26, 대구 EXCO) |
| 권호 |
24권 2호, p.1972 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
Investigating the effect of the defectiveness of spinel structure in ZnAl mixed oxide catalysts on the glycerol carbonation with urea |
| 초록 |
In this study, we investigated how the defectiveness of ZnAl2O4 lattice structure influenced the catalytic performance in glycerol carbonylation with urea. The defectiveness in the catalysts was examined with three types of catalyst preparation: physical mixing of coprecipitated ZnO and ZnAl2O4 (p-ZnAlO), impregnation of ZnO onto ZnAl2O4 (i-ZnAlO), and citric acid-templated ZnAlO (c-ZnAlO). Zn atoms could substitute in the spinel structure to form inverse spinel structure of ZnAl2O4 lattice, producing the defectiveness in the ZnAl2O4 lattice structure with the order of p-ZnAlO ＜ i-ZnAlO ＜ c-ZnAlO. The order of defectiveness in the different types of catalysts was strongly related to not only the catalyst acidity but also the existence of Zn NCO complex on the solid surface, which enhanced the glycerol carbonate (GC) production with a high GC yield. The Zn NCO complex on solid surface played an important role as a Zn-containing intermediated with which glycerol reacted with urea not Zn to produce GC while the Zn NCO complex in liquid phase facilitated either the reaction between Zn and glycerol to form Zn glycerolate or the GC production by the reaction between glycerol and urea. |
| 저자 |
Nguyen Phu Huy, 신은우, Lien Do-Thi, 우홍안
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| 소속 |
울산대 |
| 키워드 |
촉매 및 반응공학 |
| E-Mail |
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| 원문파일 |
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