| 학회 | 한국화학공학회 |
| 학술대회 | 2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 | 20권 2호, p.2482 |
| 발표분야 | 신진연구자 심포지엄 |
| 제목 | Preparation and Characterization of Alumina-Precursor Powders by Gas-Phase Hydrolysis of AlCl3 |
| 초록 | In the present study, AlCl3 was hydrolyzed in an aerosol reactor to produce spherical alumina-precursor (AlOxCly(OH)z), based on the AlCl3 vapor hydrolysis kinetics. The alumina-precursor was then calcined to produce α-alumina used for ceramic-grade alumina. The kinetics of AlCl3 hydrolysis was studied in a batch reactor. The reaction variables were the H2O/AlCl3 molar, the reaction temperature, and the AlCl3 concentration. An overall reaction rate equation involving four kinetic parameter, -rHCl=(Ae(-E/RT))CαAlCl3C(H2O)/(1+βCH2O) was proposed. and were determined to be 1.85 × 109 L2.27/mol2.27․s, 35.8 kJ/mol, 2.27 and 873.7 L/mol respectively, by nonlinear regression to best fit measured HCl concentrations. AlCl3 was partially hydrolyzed in an aerosol reactor at a temperature of 300 to 700oC to produce spherical alumina-precursor, which can be represented as AlOxCly(OH)z. The obtained alumina-precursor were spherical, loosely agglomerated, and distributed in the size range of 50 to 300 nm. The alumina-precursor was calcined at 1200oC to obtained an α-alumina. |
| 저자 | 박회경 |
| 소속 | 공주대 |
| 키워드 | Hydrolysis; Kinetics; AlCl3; α-alumina |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
