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Effect of intraparticle diffusion on catalyst decay

✍ Scribed by M. Chocrón; M.C. Raffo Calderón; N. Amadeo; M. Laborde

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
392 KB
Volume
51
Category
Article
ISSN
0009-2509

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✦ Synopsis

The interrelation between internal diffusion and deactivation is examined. The study is centered on the copper catalyst used in the water-gas-shift reaction (WGSR). This catalyst is deactivated by the presence of chlorine in the feed. A Langmuir-Hinshelwood model for the reaction kinetics is considered. With a high diffusional resistance, the poison is eliminated inside the pellet, and this explains the observed inhomogeneous deactivation of the industrial bed. The life of the catalyst increases when diffusional resistance for the poison increases. A general equation for the effectiveness factor, which includes the catalyst decay, is defined.

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