Analysis of Two Phase Mass Transfer Kinetics by Logarithmic Driving Force Based on Chemical Thermodynamics.

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概要

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• Interphase transfer kinetics of neodymium and nitric acid was studied using a single drop column with recycling organic phase via an external mixing vessel in H<SUB>2</SUB>O-HNO<SUB>3</SUB>/NaNO<SUB>3</SUB>-Nd(NO<SUB>3</SUB>)<SUB>3</SUB>-tri-n-butylphosphate system. Experimental data have been analyzed by two new concepts for driving forces for transport : synthesized linear and logarithmic forms. The former is defined as geometrical-mean driving force, and the latter is the logarithm of the product of reciprocals of concentration ratios x/x<SUP>e</SUP> and y/y<SUP>e</SUP> against equilibrium states in each phase, i.e. In {(x<SUP>e</SUP>•y<SUP>e</SUP>)/ (x•y)}.<BR>By applying thermodynamic logarithmic form of driving force along reaction coordinate, the net transfer fluxes of neodymium and nitric acid have been represented by chemical affinity under high ionic strengths over a wide range of solvent loading as flux=flux°f(1-exp(-A/RT)).

• 一般社団法人 日本原子力学会の論文

著者

• NABESHIMA Masahiro

  Tokai Research Center, Sumitomo Metal Mining Co., Ltd.

関連論文

• Analysis of Two Phase Mass Transfer Kinetics by Logarithmic Driving Force Based on Chemical Thermodynamics.
• New Chemical Affinity with Reference to Equilibrium and Reaction Trajectories of Interphase Mass Transfer.

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