Steam reforming reactor designed to reduce catalyst crushing

Details Steam reforming reactor designed to reduce catalyst crushing Steam reforming reactor designed to reduce catalyst crushing

1977-12-27

1980-05-20

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

48 94, 422203, 422211, B01J 700, B01J 806

Patent

active

042039509

ABSTRACT:
A reactor for steam reforming of hydrocarbon fuel to produce hydrogen having an inner cylindrical wall and outer cylindrical wall which provide an annular reaction chamber within which solid particles such as catalysts are disposed. During operation of the reactor, the reactor goes through temperature cycles in which the temperature of the reactor is increased and decreased, such as, during start up and shut down and the volume within the annular reaction chamber increases during heating a greater amount than the volume of the solid particles due to different coefficients of expansion of the inner and outer walls and of the solid particles. This differential expansion allows the solid particles to slump when the temperature of the reactor is elevated and results in pressure being exerted by the walls of the reactor against the solid particles when the temperature of the reactor is reduced. This pressure may result in crushing of the solid particles. The reactor incorporates a design which eliminates or reduces crushing of the solid particles.

REFERENCES:
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patent: 3041149 (1962-06-01), Houdry
patent: 3127247 (1964-03-01), Davis, Jr.
patent: 3154388 (1964-10-01), Purse
patent: 3166382 (1965-01-01), Purse et al.
patent: 3685972 (1972-08-01), DePalma et al.
patent: 3824790 (1974-07-01), Thomaides
patent: 4098587 (1978-07-01), Krar
patent: 4098588 (1978-07-01), Buswell et al.
patent: 4098589 (1978-07-01), Buswell et al.

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