| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.1526 |
| 발표분야 |
미립자공학 |
| 제목 |
Dissolution Kinetics of Aluminum Can in Sec-butyl Alcohol for Aluminum sec-butoxide |
| 초록 |
A kinetic study of dissolution reaction of Al can waste was conducted for the synthesis of Aluminum sec-butoxide (ASB). With the used Al can and sec-Butyl alcohol (SBA) as reactants, the reaction was examined at the condition of 3mol SBA/mol Al of stoichiometric ratio, adding 10-3mol HgI2/mol Al for catalyst and no agitation at the reaction temperature ranging from 70 to 100℃. After 24 hours, the reaction gave a 75% yield. A two-stage dissolution mechanism was proposed in which the dissolution rate is determined first by a chemical reaction and then by ash layer diffusion. On the basis of the shrinking core model [1], the chemical reaction rate equation on the shape of Al can was established: XA=kc inf from 0 to t (1-XB)dt. The concentration of SBA was added to the reaction at the stoichiometric ratio, then it was largely changed through the dissolution reaction. Therefore, since the conversion rate SBA varies greatly depending on the reaction time, it was included as an integral term of the reaction time. In the second stage, the dissolution rate is controlled by diffusion control through the ash layer. The rate equation was established toXA^2=kA inf from 0 to t (1-XB)dt. |
| 저자 |
유승준1, 윤호성2, 장희동2, 이준용1, 유영훈1, 곽동희1, 이세일1, 황경준1
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| 소속 |
1서남대, 2한국지질자원(연) |
| 키워드 |
Kinetics; Dissolution; Aluminum can; Aluminum sec-butoxide; Chemical reaction; Ash layer diffusion
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| E-Mail |
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| 원문파일 |
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