NOVELTY - A modular fuel reformer comprises a removable carrier (20) including at least one reformer module and a connector (32). The carrier is connected to a reformer assembly (10) to enclose module with a cavity (12) of the assembly. The connector secures the carrier and assembly in fluid-tight relationship, and is easily disengageable to permit removal of the carrier from the fuel reformer assembly.    USE - In automotive applications, such as motor vehicles, and in small dispersed applications, such as cogeneration, or supply of electricity at remote sites.    ADVANTAGE - Serviceability of the fuel reformer is improved by designing the reformer, so that catalyst can readily be removed from the reformer for replacement or repair. The removable carrier has a portion extending outside the cavity to facilitate removal of the carrier from the fuel reformer. The fuel reformer permits a technician to easily remove and replace catalyst in carrier or a module, without having to physically touch or handle the catalyst material. The module carrier separates the catalyst or other modules from necessary connections of the reformer to its surrounding, thereby simplifying the connection of the catalyst carrier to the reformer. Careful system design is essential to enable the less durable components of a fuel reformer to be replaced easily, and the placement of the catalytic components in an easily detachable carrier is an important aspect of constructing an easily serviced reformer.    DETAILED DESCRIPTION - The module comprises a catalyst including at least one of a fuel reforming catalyst, a water gas shift catalyst, a catalyst for reforming carbon monoxide or other contaminants or catalyst burner catalyst. The connector comprises at least one of a flange with both holes, clamp, latch, retaining spring, threaded connection, nut and stud, pin, bayonet-type engagement, retaining ring, chuck or collect or crimped disposable connector.    An INDEPENDENT CLAIM is included for a method for improving serviceability of the above fuel reformer.    DESCRIPTION OF DRAWING(S) - The figure shows the above reformer with a carrier removed.    reformer assembling (10)    cavity of reforming assembly (12)    gasket (16)    carrier (20)    water gas shift unit (26)    connector (32)    central opening (34)