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Effect of size and shape of catalyst microparticles on pellet pore structure and effectiveness

✍ Scribed by K. Klusáček; P. Schneider

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
468 KB
Volume
36
Category
Article
ISSN
0009-2509

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✦ Synopsis

Abstrsct-Catalyst

pellets with bidisperse pore structure were simulated by packed bed of microporous ion exchange resin (sulfonated styrentiivinytbenzene copolymer) and inert glass particles. Inert particles of different size and shape were used to modify the shape and volume of transport macropores (voids between the particles).

Tortuosities of pellets were obtained from the experimentally measured effect of internal diffusion on the rate of catalytic methanol dehydration.

Analysis of resutts shows that in the region of strong internal diffusion inlluence the highest pellet effectiveness is achieved for equal-size spherical micropartictes. To ensure optimum macropore structure even in the transition region between the kinetic region and the region of strong difIusion influence, volume of transport macropores has to be reduced by combination of appropriately-sized sphericat catalyst microparticles.

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