Liquid-Solid Mass Transfer in Packed-Bed Reactors with Porous Particles

概要

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Three different experiments were carried out in order to estimate the liquid-solid mass transfer coefficient (k_s) in a packed bed with porous particles. The experiments were, (A) liquid-phase hydrogenation of maleic acid on Pd-Al_2O_3,(B) hydrolysis of ethyl acetate on Amberlite 200C, and (C) moment analysis of in-pulse response curve in a packed bed of Amberlite XAD-2. Data were taken at low liquid feed rates and with small particles. The mass transfer factor (j_D) which is dimensionless with respect to k_s was correlated with the particle Reynolds number (Re_p). The obtained values of j_D were much lower than those expected from previous correlations obtained from the dissolution of nonporous particles. The results suggested that the effective mass transfer area (a_s) between liquid and porous particles was less than the geometrical outer surface area of the particles. a_s was considered to be influenced by the stagnant hold-up and the pore openings.
公益社団法人日本薬学会の論文
1982-01-25