Abstract
Experimental results for the mass transfer between spherical naphthalene particles and air in packed tubes of very low tube to particle diameter ratio (D/d=1.41, 1.98, and 3.77) are presented. During the experiments the Reynolds number (2.4<Re 0<1500), the bed length, and the test temperature have been varied. Data reduction has been carried out with and without accounting for axial dispersion in the model. The measured Sherwood numbers are compared with the predictions according to the correlation of Gnielinski and of Wakao/Funazkri, originally developed for large packed beds. The porosity of packings at smallD/d-ratios is discussed.
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