2096.     ---------------.  [LEVA, M.]  Elutriation of Fines From Fluidized Systems. Chem. Eng. Progress, vol. 47, 1951, pp. 39-45.

        Some fundamental relationships between operating variables and elutriation from fluidized systems are discussed.  Special attention is given to fluidized beds, such as Fischer-Tropsch catalysts.  The simplest type of systems was investigated, those essentially composed of one coarse and one fines component.  Rates of elutriation could be expressed by way of the law governing 1^st-order chemical reactions and typical rate constants could be calculated.  It was shown that the rate constants are related to such variables as linear gas velocity, size of coarse and fines constituents, material density, and bed height.  the gas velocity was recognized as a system driving force, and an analogy was suggested between a system of fines in coarse particles or solutions.  The analogy was extended further, and it appeared that concentration conditions in dense-phase and dilute-phase fluidized systems could be related by a modified form of Henry’s law.

                    -----------.  See abs. 3090.