Catalytic steam reforming of hydrocarbons

Details Catalytic steam reforming of hydrocarbons Catalytic steam reforming of hydrocarbons

1982-06-03

1984-04-10

Mars, Howard T.

Compositions

Gaseous compositions

Carbon-oxide and hydrogen containing

C01B 338

Patent

active

044420200

ABSTRACT:
The hot effluent from the catalytic steam reforming of a major portion of a fluid hydrocarbon feed stream in the reformer tubes of a primary reformer, or said effluent after secondary reforming thereof, is mixed with the hot effluent from the catalytic steam reforming of the remaining portion of the feed discharged from the reformer tubes of a primary reformer-exchanger. The combined gas stream is passed on the shell side of the reformer-exchanger countercurrently to the passage of feed in the reformer tubes thereof, thus supplying the heat for the reforming of the portion of the feed passed through the reformer tubes of the reformer-exchanger. At least about 2/3 of the hydrocarbon feed stream is passed to the reformer tubes of said primary reformer, heated by radiant heat transfer and/or by contact with combustion gases, at a steam/hydrocarbon mole ratio of about 2-4/1. The remainder of said feed stream is passed to the reformer tubes of said reformer-exchanger at a steam/hydrocarbon mole ratio of about 3-6/1. The reformer shell of the reformer-exchanger is internally insulated by a refractory lining or by use of a double shell with passage of water or a portion of the feed material between the inner and outer shells. There is no significant difference between the pressure inside and outside of the reformer tubes of said primary reformer-exchanger.

REFERENCES:
patent: Re26990 (1970-11-01), Bongiorno
patent: 2519696 (1950-08-01), Ore
patent: 3262758 (1966-07-01), James et al.
patent: 3264066 (1966-08-01), Quartulli et al.
patent: 3278452 (1966-10-01), Vorum
patent: 3607125 (1971-09-01), Kydd
patent: 3910768 (1975-10-01), Woebeke et al.
patent: 4079017 (1978-03-01), Crawford et al.
patent: 4337170 (1982-06-01), Fuderer

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