Accuracy of the pseudo steady state approximation for moving boundary diffusion problems

✍ Scribed by K.B. Bischoff

• Publisher: Elsevier Science
• Year: 1963
• Tongue: English
• Weight: 238 KB
• Volume: 18
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(63)85050-2

✦ Synopsis

The problem of heterogeneous solid-fluid chemical reactions with a moving boundary is commonly treated by means of the pseudo steady state approximation.

A better approximation to the exact solution has been derived in order to estimate the accuracy of the pseudo steady state method. It is found that for solid-gas systems the pseudo steady state approximation is valid but for solidliquid systems it may be in error.