Abstrac-Expenments conducted In a stirred cell on evaporation of pure bqulds Into various tamer gases yield that the gas-wde NaSS transfer coefficient, 4, IS proportIonal to the bmary dfiusmty, D, ramed to the power 0 684 t-2/3) Ih'TRODUCTION The obJectrve of the present study IS to detemme the expo
Effect of diffusivity on gas-side mass transfer coefficient
โ Scribed by A. Tamir; J.C. Merchuk; P.D. Virkar
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 109 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
โฆ Synopsis
A and B fall to zero witlung the film, I e mstantaneous reactrons Tlus range of behavlour has been discussed frequently at some length (e g Danckwerts[2], Astar&@]) It Is therefore clear that the react~oon may proceed supnticantly either m the bulk of the liquid (Fig la-c) or m the liquid tilm (Fg le-g) and the treatment of Cbowhury and Ross IS not, as they suggest, of general appbcablllty but confirmed to the regune shown m Frg l(b and c) However tbrs regune IS seldom encountered in practice. except in the case of reactions which are so slow that the hqmd IS umformly saturated ~llth B-I e
๐ SIMILAR VOLUMES
The effect of diffusivity on gas-side mass transfer coefficient was studied in an experimental bubble column. A fourteen-fold variation of diffusivity was obtained by using a variety of solutes and carrier gases. Both absorption and vaporization experiments were car&d ou< some&es for the same solute
The effect of gas flow rate, liquid flow rate and dilfusivity of the solute in the gas-phase on the gas-side mass transfer coefficient was investigated in laboratory packed columns containing + in. (O-95 cm) ceramic Raschig rings. An eight-fold variation in the diffusivity was obtained. It was found
The present work reports a series of' experimental measurements of liquid-side mass transfer coefficient for slugs rising in liquids with viscosities in the range 0.9 x IO-'-0.14 Pas. Three column diameters were used (19,32 and 52 mm) and slugs with values of L/D up to 38 were studied. The data obta
comparison of the values of mterfaclal area m cocurrent downward flow of gas and hquld with those obtamed m upward flow revealed very httle difference Volumetric as well as true hqmd side mass transfer coefficients m downflow were found to be several times lower than m upflow Only m the smallest 10