ENHANCEMENT OF THE GAS-ABSORPTION RATE IN AGITATED SLURRY REACTORS BY GAS-ADSORBING PARTICLES ADHERING TO GAS-BUBBLES

被引：57

作者：

VINKE, H ^{[1
]}

HAMERSMA, PJ ^{[1
]}

FORTUIN, JMH ^{[1
]}

机构：

[1] UNIV AMSTERDAM,DEPT CHEM ENGN,NIEUWE ACHTERGRACHT 166,1018 WV AMSTERDAM,NETHERLANDS

来源：

CHEMICAL ENGINEERING SCIENCE | 1993年 / 48卷 / 12期

关键词：

D O I：

10.1016/0009-2509(93)80237-K

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, it is shown that the rate of hydrogen absorption into an aqueous solution is considerably enhanced by the presence of small particles, provided that (a) particle-to-bubble adhesion occurs, so that, during the absorption, a sufficiently large part of the gas-liquid interface is covered by adhering particles; (b) at equilibrium, the hydrogen concentration in the particles is much higher than that in the surrounding liquid. A model is derived to calculate the relationship between the enhancement factor E0 of the initial gas-absortion rate, the fraction zeta of the gas-liquid interface covered by adhering particles, and the concentration gammas of the catalyst particles in the slurry. The model is verified by flotation experiments and gas-absorption measurements, performed with hydrogen and aqueous suspensions containing different concentrations of small carbon-supported or alumina-supported catalyst particles.

引用

页码：2197 / 2210

页数：14

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