NOVELTY - Chemical reactor (190) comprises: several elongate reaction chambers in arrangement (192), and including at least first, second and third distinct elongate chambers to support first, second and third reactor functions and associated with first, second and third process feeds, respectively; and distributor arranged in fluidic communication with each of elongate chambers, to distribute at least one fluid to each elongate chamber and to produce two-dimensional radial distribution of fluidic flow through elongate chambers with respect to process feeds.    USE - As chemical reactor, for conversion of fuel or bio-fuel into pure hydrogen and carbon dioxide; and for extracting hydrogen from fuel (claimed). The fuels include liquid, diesel, logistics and naval logistics fuels.    ADVANTAGE - The reactor provides micro- or mini-channel reactor having enhanced designs, which exhibits combining benefits of micromachining for realizing complex, two-dimensional radial distribution patterns for heat transfer and process intensification; extrusion for versatile fabrication of scalable mini- or micro-channel networks over range of thermal, mechanical, and catalytic properties not currently achievable by current micro-reactor fabrication methods; and ease of catalyst introduction, via conventional methods for monolith catalyst supports. The chemical reactor or reforming unit is capable of coupling greater than or equal to 3 separate kinetic and/or transport processes within single reactor, which provides breakthrough in design of portable reactors or fuel reformers for converting fuels to hydrogen. By packaging network of channels along with channel-specific distributors, two-dimensional networks of channels supporting multiple (e.g. greater than or equal to 3) separate and distinct process flows (e.g. steam reforming, secondary hydrogen removal, and sweep gas passage) in variety (e.g. 1- and 2 dimensions) of radial distribution patterns of fluidic flow are realized, and provide improved flow complexity and thermal efficiency i.e. efficient heat transfer over range of materials properties. The utilization of 2-dimensional networks of unique, separate process flows in variety of radial distribution properties also allows for combining several membranes in both series and/or parallel within a single integrated structure. Further, by alleviating high costs associated with micromachining large networks of mini- or micro-channels, cost-effective, scalable and configurable mini- or micro-channel network can be realized. The mini- or micro-channel networks formed allow coupling of reaction and separation with mass transfer between multiple process streams, as well as coupling of reactions, fuel vaporization, and effluent cool-down with heat transfer between multiple process streams. In both cases, 2-dimensional distribution patterns can be employed, which allow the design of three-dimensional, self-insulating temperature and concentration gradients. Additionally, reactor designers provide ability to integrate catalytic anti-corrosion coatings for maximum permselective film stability e.g. films including palladium and/or perovskite for flexibility in operating temperatures, and/or for stability challenges.    DETAILED DESCRIPTION - A chemical reactor (190) comprises: several elongate reaction chambers defining arrangement (192), and including at least first, second and third elongate chambers adapted to support first, second and third reactor functions occurring within them and associated with first, second and third process feeds, respectively, such that each of first, second, and third reactor functions are distinct from one another; and a distributor arranged in fluidic communication with each of elongate chambers, and configured and dimensioned to distribute at least one fluid to each elongate chamber and to produce two-dimensional radial distribution of fluidic flow through at least the first, second, and third elongate chambers with respect to the first, second, and third process feeds. The reactor comprises a bundle of extruded channels, at least including elongate chambers (preferably elongate chambers are extruded mini-channels or micro-channels); and monolith catalyst support (193) including an Nx M array of channels at least including elongate chambers. The distributor is configured and dimensioned to receive input fluid (preferably fuel or bio-fuel), and discharge pure hydrogen and pure carbon dioxide. The elongate chambers and distributor are configured and dimensioned to perform integrated, multi-stage process of hydrogen extraction; manifest complex flow distribution scheme for combining catalytic combustion with endothermic reforming, combining combustion with vaporization, combining combustion, reforming, and vaporization, and/or coupling fuel reforming with hydrogen production. The elongate chamber(s) have walls including microporous material layer for introducing catalytic activity; walls including perm-selected film for hydrogen purification; manifest membrane reaction configuration for combining hydrogen generation with purification; manifest ceramic mini- or micro-channel network including composite catalyst membranes for hydrogen coupling of alcohols; and/or manifest coupling of catalytic reforming membranes with non-catalytic gas cleanup membranes. The distributor includes respective first and second flow distribution heads (191) having respective ends coupled to opposite corresponding ends of arrangement and respectively arranged in fluidic communication with each of the elongate chambers, in which each of first and second flow distribution heads is fluidically sealed with respect to respective corresponding end of the arrangement. The first, second and third feeds are reforming, cleanup, and sweep feeds, respectively. An INDEPENDENT CLAIM is included for extracting hydrogen from fuel involving: providing chemical reactor comprising several elongate chambers defining arrangement, and including at least the first, second and third elongate chambers; connecting first fluidic reservoir containing fuel associated with first and second process feeds to elongate chambers; connecting second fluidic reservoir containing sweep fluid associated with third process feed to elongate chambers; and operating chemical reactor to produce two-dimensional radial distribution of fluidic flow through the three elongate chambers with respect to the three process feeds for extracting quantity of hydrogen from reforming feed that is one of first and second process feeds, and introducing hydrogen into sweep feed.    DESCRIPTION OF DRAWING(S) - The figure shows a detailed schematic of the chemical reactor having 25-channel distributor design.    Mini- or micro-channel device or reactor (190)    Distributor blocks or heads (191)    Checker-board pattern for fluid flow/arrangement of elongate reaction chambers (192)    Large monolith block (193)    Fluid inlets (195, 196)