Patent ID: 7628963

Claim:
A small cylindrical reformer, comprising: six cylindrical pipes coaxially arranged and spaced to form a cylindrical inner space interior to an innermost one of the six cylindrical pipes, and first to fifth annular inner spaces coaxially placed sequentially outwardly between radially adjacent pairs of the six cylindrical pipes; a combustion reaction unit including: a combustion part formed in the cylindrical inner space to burn air and fuel supplied from an air/fuel inlet, a combustion gas distributor formed at a longitudinal end of the cylindrical inner space to distribute a combustion gas generated in the combustion part, and a first combustion gas passage formed in the first annular inner space and a second combustion gas passage formed in the fifth annular inner space to guide the distributed combustion gas into an outlet to be discharged; and a fuel-converting catalytic reaction unit including: two reforming reaction parts respectively formed in the second and fourth annular inner spaces for preparing a reforming reaction reformate, each reforming reaction part having a reforming catalyst to reform feed and water supplied from a feed/water inlet, and a water gas shift reaction part formed in the third annular inner space for preparing a water gas shift reformate to decrease a concentration of carbon monoxide in the reforming reaction reformate, wherein: the third annular inner space is positioned between the second and fourth annular inner spaces.