Deactivation phenomena by site poisoning and pore blockage: the effect of catalyst size, pore size, and pore size distribution

Journal Article · Sun Jan 01 04:00:00 EST 1984 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(84)90063-0· OSTI ID:5999908

Tsakalis, K S; Tsotsis, T T; Stiegel, G J

The problem of catalyst deactivation by active site poisoning and pore blockage is analyzed. The effect of catalyst size, average pore size, and pore size distribution on the phenomenon of deactivation is investigated for two simple pore structure models, i.e., the single pore and parallel bundle of pores models. It is shown that the overall catalytic behavior and performance strongly depend on the catalyst's physical properties, such as its size, pore size, and pore size distribution. The mathematical models studied here are admittedly only oversimplified analogs of the complex physicochemical phenomena occurring during realistic industrial processes. The main qualitative features, however, of the overall catalytic behavior predicted here are the result of basic and strongly counteracting, underlying physicochemical processes. As such, the types of catalytic behavior described are not strongly dependent on the particular kinetic and diffusion models employed but are closely associated with macromolecular catalytic reaction systems that deactivate by simultaneous active site coverage and pore blockage. 27 references, 13 tables.

• Research Organization: Univ. of Southern California, Los Angeles
• OSTI ID: 5999908
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 88; ISSN JCTLA
• Country of Publication: United States
• Language: English

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CATALYSTS
DATA
EXPERIMENTAL DATA
INFORMATION
NUMERICAL DATA
POISONING
POROSITY
SIZE