NOVELTY - Reactor system comprises: flow-through reactor having inner reactor located within and extending outside of outer chamber; inner reactor comprising catalyst bed, inlet and outlet, and first wall of hydrogen membrane in that portion of inner reactor located within outer chamber, and second wall of impermeable material in that portion of inner reactor located outside of outer chamber; and outer chamber having outlet, inner walls and outer walls and surrounding catalyst bed portion of inner reactor, where inner walls are first wall of inner reactor.    USE - The reactor system is useful for dehydrogenating primary aliphatic or di-amines to their corresponding nitriles (claimed), which is useful for high density hydrogen release and chemical storage, where the hydrogen gas removed is fed directly to either fuel cell or engine.    ADVANTAGE - The reactor system quickly remove any and all hydrogen generated during the dehydrogenation reaction, and avoids parallel and side reactions.    DETAILED DESCRIPTION - Reactor system comprises: a flow-through reactor having an inner reactor located within and extending outside of an outer chamber; an inner reactor comprising a catalyst bed, an inlet and an outlet, and having a first wall composed of a hydrogen membrane in that portion of the inner reactor located within the outer chamber, and a second wall of an impermeable material in that portion of the inner reactor located outside of the outer chamber, where the inlet further comprises a means for vaporizing a liquid to form a gaseous state prior to entering the catalyst bed; and an outer chamber having an outlet, inner walls and outer walls and surrounding the catalyst bed portion of the inner reactor, where the inner walls are the first wall of the inner reactor, and the outlet further comprises a vacuum to pull through purified hydrogen formed in the inner reactor. INDEPENDENT CLAIMS are also included for:    (1) a reactor system, comprising: a flow-through reactor having a circumferential outer reactor located surrounding an inner chamber; an outer circumferential reactor comprising a catalyst bed, an inlet and an outlet, and having an inner wall composed of a hydrogen membrane in that portion of the outer circumferential reactor located surrounding the inner chamber, and an outer wall of an impermeable material in that portion of the inner reactor located outside of the inner chamber, where the inlet further comprises a means for vaporizing a liquid to form a gaseous state prior to entering the catalyst bed; and an inner chamber having an outlet and outer walls, where the outer walls are the inner walls of the circumferential reactor, and the outlet further comprises a vacuum to pull through purified hydrogen formed in the outer circumferential reactor; and    (2) a process for dehydrogenating an aliphatic mono- or di-amine to its corresponding mono mono- and di-nitriles, comprising: providing a mono- and/or di-amine in a vapor form to a reactor having a dehydrogenation catalyst, an inlet and an outlet, where the mono- and/or di-amine is provided through the inlet; providing sufficient heat to dehydrogenate the mono- or di-amine into its corresponding mono- or di-nitriles and hydrogen gas; physically removing the hydrogen gas through a fractionating hydrogen membrane or by utilizing an inert sweep gas; and recovering the mono- and/or di-nitriles formed by condensing the vapor in the outlet and recovering condensed liquid.    DESCRIPTION OF DRAWING(S) - The figure shows the outside and side view of the prototype reactor.    Vapor fuel inlet tube (102)    Inlet cap flange (103)    Outer reactor tube (106)    Positive thermocouple feed-through (108)    Negative thermocouple feed-through (109)