United States Patent  [ii] Patent Number: 5,004,592
Pinto  Date of Patent: Apr. 2,1991
 STEAM REFORMING PROCESS
 Inventor: Alwyn Pinto, Cleveland, England
 Assignee: Imperial Chemical Industries PLC, London, England
Related U.S. Application Data
 Division of Ser. No. 767,067, Aug. 19, 1985, Pat. No. 4,750,986, which is a division of Ser. No. 591,328, Mar. 19, 1984, abandoned.
 Foreign Application Priority Data
Mar. 25, 1983 [GB] United Kingdom 8308343
 Int. CI.' C01B 3/38
 U.S. CI 423/652; 48/198.7;
48/197 R; 252/373; 252/376
 Field of Search 48/196 A, 197 R, 214 A,
48/215, 198.7, 198.1; 252/373, 376; 423/359,
 References Cited
U.S. PATENT DOCUMENTS
3,264,066 8/1966 Quartulli et al 48/197 R
4,162,290 7/1979 Crawford et al 48/196 A
FOREIGN PATENT DOCUMENTS
53-82690 7/1978 Japan .
Primary Examiner—Joye L. Woodard
Attorney, Agent, or Firm—Cushman, Darby & Cushman
The endothermic reaction of a hydrocarbon feedstock with steam and/or carbon dioxide is carried out using a double-tube reactor. In one preferred form of the reactor the catalyst is present as a coating on the outside of the inner tube. In another form inner tubes are mounted in one tube-plate and the outer tubes in a second tube plate and the tube plates are disposed across a cylindrical shell so as to define a heat exchange zone (provided with a heat source) a reactants feed zone and a products offtake zone. The heat source is preferably a burner, to be fed with the product of the endothermic reaction, followed by a secondary reforming catalyst. The apparatus makes possible processes for making raw hydrogen-containing gases with advantageous internal heat recovery.
3 Claims, 3 Drawing Sheets