NOVELTY - A system for acquisition/delivery of hydrogen from organic compound capable of reversible hydrogenation/dehydrogenation, where compound is initially in its hydrogenated form and catalytically dehydrogenated forming hydrogen and byproduct dehydrogenated organic compound, where system comprises liquid fuel (2) line; heat exchange fluid (10) line; and microchannel reactor (8, 24) coupled to the lines, where reactor has reaction channels and heat exchange channels (12), where reaction product exiting microchannel reactor comprises hydrogen and dehydrogenated liquid fuel.    USE - As a system for acquisition and delivery of hydrogen from an organic compound capable of reversible hydrogenation/dehydrogenation (claimed), where hydrogen is used as fuel for vehicles.    ADVANTAGE - The system has ability to carry out dehydrogenation of a liquid organic compound and generate hydrogen at desired delivery pressures; has ability to carry out dehydrogenation under conditions where the liquid organic fuel source and dehydrogenated liquid organic compound remain in the liquid phase, thus eliminating the need to liquefy or quench the reaction byproduct; has ability to employ extended pi-conjugated substrates as a liquid organic fuel of reduced volatility in both the hydrogenated and dehydrogenated state, thus easing separation of the released hydrogen for subsequent usage; has ability to carry out dehydrogenation under conditions where there is no entrainment of the hydrogenated organic compound such as the hydrogenated pi-conjugated substrate fuel source and dehydrogenated reaction product in the hydrogen product; has ability to carry out dehydrogenation in small catalytic reactors suited for use in motor vehicles; has ability to generate hydrogen without the need for excessively high temperatures and pressures and thereby reduce safety concerns; and has ability to use waste heat from the fuel cell or an IC engine for liberating the hydrogen.    DETAILED DESCRIPTION - A system for acquisition and delivery of hydrogen from an organic compound capable of reversible hydrogenation/dehydrogenation, where the organic compound is initially in its hydrogenated form and subsequently catalytically dehydrogenated under dehydrogenation conditions forming hydrogen and byproduct dehydrogenated organic compound, where the system comprises a liquid fuel (2) line; a heat exchange fluid (10) line; and at least one microchannel reactor (8, 24) coupled to the liquid fuel line and the heat exchange fluid line, where the at least one microchannel reactor comprises reaction channels and heat exchange channels (12) adjacent to the reaction channels, where a reaction product exiting the at least one microchannel reactor comprises hydrogen and a dehydrogenated liquid fuel. The system further comprises at least one phase separator (16) coupled to the at least one microchannel reactor, where the phase separator accepts the reaction product comprising hydrogen and the dehydrogenated liquid fuel from the at least one microchannel reactor for separation; a first exit line coupled to the at least one phase separator for accepting the hydrogen; and a second exit line coupled to the at least one phase separator for accepting the dehydrogenated liquid fuel. The liquid fuel line comprises N-ethyl carbazole.    DESCRIPTION OF DRAWING(S) - The figure shows flow diagram of a dehydrogenation process for producing hydrogen from a liquid fuel while maintaining the liquid fuel and dehydrogenated byproduct in liquid phase.    Liquid fuel (2)    Manifold (4)    Reactor chamber (6)    First microchannel reactor (8)    Heat exchange fluid (10)    Heat exchange channels (12)    Gas/liquid separator (16, 34, 46)    Reaction chamber (22)    Second microchannel reactor (24)