NOVELTY - A gaseous fuel catalytic partial oxidation (CPOX) reformer (200) comprises an array of spaced-apart CPOX reactor units (209), each containing an elongate tube with gas-permeable wall which has internal surface and external surface, encloses open gaseous flow passageway, and defines inlet and outlet of CPOX reactor unit, and hydrogen barrier associated with external surface of CPOX catalyst-containing wall section of CPOX reactor unit; and igniter (223) in thermal communication with a section of gas-permeable wall containing a CPOX catalyst of greater than or equal to 1 CPOX reactor unit.    USE - A gaseous fuel catalytic partial oxidation reformer for hydrogen-rich reformate production (claimed).    ADVANTAGE - The reformer avoids occurrence of flashing, excessively high CPOX reaction temperatures, and/or low back pressures throughout all of its gaseous stream-routing and gaseous flow components and passageways. The CPOX catalyst-containing wall section is gas-permeable to allow diffusion of gaseous CPOX reaction mixture and product hydrogen-rich reformate while remaining structurally stable under CPOX reaction conditions. CPOX reactor units are spaced apart so that heat loss can occur from CPOX reactor unit to prevent damage to CPOX reactor unit, and if present, to a fuel cell stack that can be in fluid and thermal communication with outlet of CPOX reactor unit, providing appropriate thermal balance among the array and facilitating thermal uniformity throughout or across the array.    DETAILED DESCRIPTION - A gaseous fuel catalytic partial oxidation (CPOX) reformer (200) comprises an array of spaced-apart CPOX reactor units (209), each containing an elongate tube with gas-permeable wall which has internal surface and external surface, encloses open gaseous flow passageway, and defines inlet and outlet of CPOX reactor unit in which CPOX reactor unit is in thermal communication with adjacent CPOX reactor unit in the array, and section of gas-permeable wall has a CPOX catalyst, and hydrogen barrier associated with external surface of CPOX catalyst-containing wall section of CPOX reactor unit; and igniter (223) in thermal communication with a section of gas-permeable wall containing a CPOX catalyst of greater than or equal to 1 CPOX reactor unit. An INDEPENDENT CLAIM is included for method of CPOX reforming a gaseous reformable fuel to hydrogen-rich reformate which involves introducing gaseous CPOX reaction mixture comprising gaseous reformable fuel into inlets of CPOX reactor units, initiating catalytic partial oxidation of gaseous CPOX reaction mixture to begin production of hydrogen-rich reformate in greater than or equal to 1 CPOX reactor unit, and maintaining catalytic partial oxidation of gaseous CPOX reaction mixture in the CPOX reactor unit.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a gaseous fuel CPOX reformer.    Gaseous fuel CPOX reformer (200)    Centrifugal blower (202)    Conduit (203)    CPOX reactor units (209)    Igniter (223)