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Communications on the theory of diffusion and reaction—II the effect of shape on the effectiveness factor

✍ Scribed by S. Rester; R. Aris

Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
207 KB
Volume
24
Category
Article
ISSN
0009-2509

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📜 SIMILAR VOLUMES

Communications on the theory of diffusio
Communications on the theory of diffusion and reaction—VIII Variational bounds on the effectiveness factor
✍ S. Rester; R. Aris 📂 Article 📅 1972 🏛 Elsevier Science 🌐 English ⚖ 932 KB

It is shown how upper and lower bounds to the effectiveness factor may be obtained by variational methods. The formulae are developed to be capable of handling mass transferresistance at the surface of the catalyst particle, a diffusion coefficient which depends upon position in the particle, and a

Communications on the theory of diffusio
Communications on the theory of diffusion and reaction - VI. The effectiveness of spherical catalyst particles in steep external gradients
✍ I. Copelowitz; R. Aris 📂 Article 📅 1970 🏛 Elsevier Science 🌐 English ⚖ 824 KB

When a spherical catalyst particle in which a non-isothermal reaction is taking place is subject to a very steep gradient of external conditions, its effectiveness factor is a function of these gradients as well as of the Thiele modulus evaluated for equatorial conditions. It is shown how the effect

Communications on the theory of diffusio
Communications on the theory of diffusion and reaction — IV Combined effects of internal and external diffusion in the non-isothermal case
✍ B. Hatfield; R. Aris 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 664 KB

If there 1s both internal and external resistance to the transfer of heat and matter to a catalytic pticle some mterestmg combmatlons of effects may arise Since multiple steady states can be obtained when only one of the resistances IS considered, there IS a range of parameters for which five steady