NOVELTY - A fuel processor control apparatus comprises multi-capacity blower (6) having feed inlet for receiving process air stream and feed outlet for producing process air flow at fixed air flow rates; first conduit (4) for connecting the feed outlet to a partial oxidation reactor (11); second conduit (7) for connection to a preferential oxidation reactor (12); and reactor air control valve in the first or second conduit which has a valve inlet for receiving a portion of the process air flow, a valve outlet, and a control body.    USE - For hydrogen production apparatus.    ADVANTAGE - The control apparatus is capable of distributing air to a fuel processor in which greater than or equal to2 air consumption zones, a reaction zone, and a preferential oxidation zone, require that the air be delivered according to the demand for hydrogen at conditions which are consistent with the requirements of the air consumption zones. The control system provides a method for anticipating carbon monoxide concentration peaks and thus avoids damage to fuel cell if the hydrogen is used as a feed stream to the fuel cell. An inexpensive and reliable system for distributing air to air consuming zones is provided without creating an unstable air control problem in the reaction zone.    DETAILED DESCRIPTION - The fuel processor control apparatus comprises multi-capacity blower having feed inlet for receiving process air stream and feed outlet for producing process air flow at fixed air flow rates, the process air flow being incrementally fixed in response to a demand for hydrogen; first conduit for connecting the feed outlet to a partial oxidation reactor; second conduit for connection to a preferential oxidation reactor; and reactor air control valve in the first or second conduit which has a valve inlet for receiving a portion of the process air flow, a valve outlet, and a control body for adjusting the portion of the process air flow in response to the hydrogen demand. The apparatus further comprises a control body for the blower which, in response to an increase in demand for hydrogen, overcompensates the air flow rate for a period of time to avoid an undue peak in carbon monoxide. A reactor temperature sensor (17) is operable to measure partial oxidation temperature and produce a reactor temperature signal. The second conduit contains a flow restrictor (14).    An INDEPENDENT CLAIM is also included for a process for controlling the hydrogen production apparatus.    DESCRIPTION OF DRAWING(S) - The figure is a schematic block diagram of the control apparatus.    Variable speed blower (3)    First conduit (4)    Multi-capacity blower (6)    Second conduit (7)    Waste gas burner (10)    Partial oxidation reactor (11)    Preferential oxidation reactor (12)    Flow restrictor (14)    Temperature sensor (17)