JPH04164802

• Main Authors: KAMEDA TAKASHI, NAKANISHI SEIICHI, KUBO YUKIO, KIBA KEIICHIRO, MURAYAMA KOHEI, ITO HAYAMIZU, TAKATANI YOSHIAKI, MATSUOKA MASAHIRO
• Format: Patent
• Language: English
• Published: 10.06.1992
• Edition: 5
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

PURPOSE:To improve economical efficiency by supplying methanol to a catalytic combustion unit, igniting a fire, subsequently raising the temperature to >= the catch fire point of a specified lower hydrocarbon-based fuel and changing over to the lower hydrocarbon-based fuel. CONSTITUTION:Methanol and preheated air are supplied to a mixing type-vaporizer 18 for vaporization of methanol and ignition is carried out at the ordinary temperature in a catalytic combustion unit 16 containing a packed oxidizing catalyst such as Pt. At a point of time when the temperature is raised, by combustion of methanol, to >=the catch fire point of a lower hydrocarbon fuel such as natural gas or LPG incapable of catalytic combustion if the temperature is not high, the fuel line 26 is changed to the lower hydrocarbon fuel. Methanol and steam are supplied to a reforming unit 10 containing a packed reforming catalyst such as Cu and steam reforming is carried out by indirect heating using a combustion gas from the catalytic combustion unit 16. The resultant reformed gas discharged from the reforming unit 10 is supplied to a hydrogen purification unit 12 for separation and purification of hydrogen and the obtained hydrogen is taken out. An off-gas containing combustible components is stored in an off-gas tank 14 and used as a fuel for the catalytic combustion unit 16.