Time-on-stream catalyst decay behaviour in a fixed-bed catalytic reactor under the influence of intraparticle diffusion: intraparticle diffusion affects only catalytic reactions
✍ Scribed by Mirosław Grzesik; Jerzy Skrzypek; B.W. Wojciechowski
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 611 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
&strati-The time-on-stream theory of catalyst decay developed by Wojciechowski is used to describe the hehaviour of a diffusion-limited aging catalyst under the assumption that the intraparticle diffusion can affect only catalytic reactions. It is shown that the presence of internal mass transport does not preclude the existence of three classes of catalyzt decsy heha$our d_epending 0~ the p_areeter N in the aging function, a(t) = (1 + Gr)-n. By evaluating X, = X,,(t,), We = W,(t,) and IV, = We(X,) profiles, the morphologies of some interesting effects are also revealed and discussed.