A system for chemical vapor infiltration and densification may comprise a reaction chamber and a plurality of conduits fluidly coupled to an exhaust outlet of the reaction chamber. A first set of conduits of the plurality of conduits may define a first flow path and a second set of conduits of the plurality of conduits may define a second flow path. The second flow path may be fluidly coupled to an inlet of the reaction chamber. A hydrogen extraction component may be in fluid communication with a least one of the first set of conduits or the second set of conduits.