FR2827591-A1  SHPILRAIN E E ET AL: "Comparative analysis of different natural gas pyrolysis methods" INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 24, no. 7, 1 juillet 1999 (1999-07-01), pages 613-624, XP004167719 ISSN: 0360-3199;  LEDJEFF-HEY K ET AL: "Compact hydrogen production systems for solid polymer fuel cells" JOURNAL OF POWER SOURCES, ELSEVIER SEQUOIA S.A. LAUSANNE, CH, vol. 71, no. 1-2, 15 mars 1998 (1998-03-15), pages 199-207, XP004112445 ISSN: 0378-7753;  POIRIER M G ET AL: "CATALYTIC DECOMPOSITION OF NATURAL GAS TO HYDROGEN FOR FUEL CELL APPLICATIONS" INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 22, no. 4, 1 avril 1997 (1997-04-01), pages 429-433, XP000678376 ISSN: 0360-3199WO2003008328-A1  SHPILRAIN E E ET AL: "Comparative analysis of different natural gas pyrolysis methods" INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 24, no. 7, 1 juillet 1999 (1999-07-01), pages 613-624, XP004167719 ISSN: 0360-3199;  LEDJEFF-HEY K ET AL: "Compact hydrogen production systems for solid polymer fuel cells" JOURNAL OF POWER SOURCES, ELSEVIER SEQUOIA S.A. LAUSANNE, CH, vol. 71, no. 1-2, 15 mars 1998 (1998-03-15), pages 199-207, XP004112445 ISSN: 0378-7753 cit dans la demande;  POIRIER M G ET AL: "CATALYTIC DECOMPOSITION OF NATURAL GAS TO HYDROGEN FOR FUEL CELL APPLICATIONS" INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 22, no. 4, 1 avril 1997 (1997-04-01), pages 429-433, XP000678376 ISSN: 0360-3199 cit dans la demande;  LEDJEFF-HEY K ET AL: "Compact hydrogen production systems for solid polymer fuel cells" JOURNAL OF POWER SOURCES, ELSEVIER SEQUOIA S.A. LAUSANNE, CH, vol. 71, no. 1-2, 15 mars 1998 (1998-03-15), pages 199-207, XP004112445 ISSN: 0378-7753 cite dans la demande;  POIRIER M G ET AL: "CATALYTIC DECOMPOSITION OF NATURAL GAS TO HYDROGEN FOR FUEL CELL APPLICATIONS" INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 22, no. 4, 1 avril 1997 (1997-04-01), pages 429-433, XP000678376 ISSN: 0360-3199 cite dans la demandeEP1423331-A1  See references of WO 03008328A1