Abstract A method for determining precision solution of a mass transfer differential equation for an unsteady-state diffusion and reaction process in a semiinfinite medium is presented. The semiinfinite medium may be solid or fluid. A component A is absorbed on the surface of the solid or in fluid phase,diffuses unsteadily, and reacts in the phase. The reaction component A is considered as one order. The precision solution of the unsteady-state diffusion model in the finite medium is given.
ZHANG Hai-yan, SHAO Shan-gen, SHAO Qing.A Precision Solution for Unsteady-State Diffusion in Semi-infinite Medium[J] Chemcial Industry and Engineering, 2003,V20(2): 80-83
2003, Vol. 20 
