Deactivation of a supported zeolitic catalyst: Diffusion, reaction and coke deposition in stochastic pore networks

✍ Scribed by R. Mann; P.N. Sharratt; G. Thomson

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 862 KB
• Volume: 41
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(86)87149-4

✦ Synopsis

The decline in activity of a commercial* supported catalyst has been interpreted using a model of reolitic micropores uniformly distributed within a network of macropores representing the silica/alumina support. Using this model. simultaneous deactivation by site coverage end pore plugging can be simulated. Changes in network structure due-to fouling are monitored by generation of theoretical adsorption isotherms for both fresh and fouled networks. The observed deactivation for catalytic cumcua cracking in a plug flow reactor at 30D°C was modelled by a series coking mechanism with the coke reducing the macropore radii by approximately 30 Angstrom.