Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.13, No.3, 261-265, 1996 GAS-PHASE RESISTANCE TO THE VAPORIZATION OF MERCURIC HALIDES IN HIGH-TEMPERATURE ATMOSPHERIC GASEOUS CONDITION
Gas-phase resistances to the vaporization of three mercury halides into atmosphere at elevated temperatures were evaluated. Lab-scale vaporization experiments for mercuric bromide, mercuric iodide and mercuric chloride were per-formed and the results were analyzed to evaluate gas-phase resistance to vaporization of three mercuric halides using the vaporization and condensation model. Overall mass transfer coefficients, KG, for the sample mercuric halides, were in the range between 4.8×10-6 g-mole sec-1 cm-2 atm-1 at the temperatures from the subliming to boiling tem-peratures and were much smaller than interfacial mass transfer coefficients, ki. It was estimated that resistance of pure gas-phase mass transfer is much larger than that of the phase transition between condensed and gas phases. It could be there-fore said that gas-phase mass transfer coefficients, kG for mercuric halides, were nearly equal to overall mass transfer coef-ficient, KG which could be determined as a function of temperatures.
Keywords:
Mercuric Halides; Vaporization; Interfacial Resistance; Gas-phase Mass Transfer Coefficient; Condensation-vaporization Model
[References]
[Cited By]
|