Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-10-29
1982-06-29
Shine, W. J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252473, 252477R, B01J 2104, B01J 2378
Patent
active
043371787
ABSTRACT:
An improved catalyst is described which comprises a normally cylindrical refractory support having gas passages communicating from end to end and oriented parallel to its axis and having gas passages in the shape of segments of circles (pie-shaped), square, hexagonal, circular, oval or sinusoidal. The exterior and interior surfaces are coated with catalytic compositions. The length of the refractory support is significantly less than the diameter. Further, there is a definite ratio of height to effective internal diameter (H:ID) of each of the gas passages. These catalysts are especially effective for endothermal reactions because both the internal and external surfaces of the support are coated with catalysts and are more efficiently heated. This is especially true for the internal surfaces of the support (i.e., the walls of the axially oriented gas passages) which heretofore have been shielded from the infra-red rays radiating from the tubes of the catalytic reactor. Thus, heat transfer to the catalyst surface is more effective in maintaining the interior surface at the desired elevated reaction temperature. The structures are especially effective for the steam-hydrocarbon reforming reaction, particularly when the hydrocarbon is in the boiling range of naphtha or below.
REFERENCES:
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patent: 3201214 (1965-08-01), Fox et al.
patent: 3359215 (1967-12-01), Reitmeier
patent: 3502596 (1970-03-01), Sowards
patent: 3518055 (1970-06-01), Egashira et al.
patent: 3776859 (1973-12-01), Simpson
patent: 4207211 (1980-06-01), Russ et al.
Atwood Kenton
Wright James H.
Price William R.
Shine W. J.
United Catalysts Inc.
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