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The well known square root formula for the kinetics of adsorption by spherical particle U(t)=(6/r0)(Dt/π)1/2 is only valid in the early stage of adsorption (U(t) ≤0.3), where U(t) shows fractional attainment to the equilibrium. Present study shows that with a little manipulation of this formula, its application range can be extended to U(t) ≤0.95. The suggested formula U(t)=(6/r0)(Dt/π)1/2-(3Dt/r0...
It is vexatious for conventional methods to calculate the compositions of equilibrium system with many components and minor components. For that, the element potential method (EPM) for composition calculation in multi-phase equilibrium system was deducted based on the principle of Gibbs free energy minimization and the law of mass conservation, by introducing Lagrange factor lambdae and the concept...
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