Regulated hydrogen production system

1. A production system comprising:

a reaction chamber having an inlet and outlet;

a gas collection chamber disposed proximate the reaction chamber and receiving gas produced in said reaction chamber; and

a regulator coupled to the gas collection chamber;

wherein the regulator selectively physically obstructs the flow of a reactant to the reaction chamber in response to pressure in the gas collection chamber.

2. The system of claim 1 , wherein the regulator regulates the reaction chamber inlet.

3. The system of claim 1 , wherein the regulator regulates the reaction chamber outlet.

4. The system of claim 1 , wherein the reaction chamber contains a catalyst.

5. The system of claim 1 , wherein the reactant comprises an aqueous metal hydride solution.

6. The system of claim 5 , wherein the aqueous metal hydride solution comprises sodium borohydride.

7. The system of claim 1 , wherein the reactant comprises hydrogen peroxide.

8. The system of claim 1 , wherein the regulator comprises a diaphragm seal.

9. The system of claim 1 , wherein the regulator comprises a poppet valve.

10. The system of claim 1 , wherein the regulator comprises a rocker valve.

11. The system of claim 1 , wherein the regulator comprises an inflatable bag.

12. The system of claim 1 , wherein the regulator comprises a pressure transducer, controller and an electromechanical valve.

13. A fuel cell system comprising:

an anode;

a cathode;

a proton exchange membrane disposed between the anode and cathode; and

the production system of claim 1 coupled to the anode.

14. The fuel cell system claim 13 , wherein the reactant comprises an aqueous metal hydride solution.

15. A fuel cell system comprising:

an anode;

a cathode;

a proton exchange membrane disposed between the anode and cathode; and

the production system of claim 1 coupled to the cathode.

16. The fuel cell system claim 15 , wherein the reactant comprises hydrogen peroxide.

17. The system of claim 1 , wherein the gas collection chamber contains at least a portion of the reaction chamber.

18. The system of claim 1 , wherein the gas collection chamber is sized in proportion to gas demands of a device supplied with gas by said system.

19. The system of claim 18 , wherein said gas comprises hydrogen and said device comprises a fuel cell.

20. The system of claim 1 , wherein movement of said regulator to physically obstruct said flow of reactant is caused by said pressure in said gas collection chamber.

21. The system of claim 1 , wherein the regulator comprises a spring that is selectively compressed by pressure in the gas collection chamber so as to regulate a flow of a reactant to the reaction chamber.

22. The system of claim 21 , wherein the regulator comprises a double piston that drives said reactant into said reaction chamber unless opposed by said pressure in said gas collection chamber.

23. The system of claim 21 , wherein the regulator comprises a piston pump that drives said reactant into said reaction chamber unless opposed by said pressure in said gas collection chamber.

24. The system of claim 21 , wherein said regulator further comprises an inflatable bag that is in communication with said gas collection chamber and inflated by an increase in pressure in said gas collection chamber, said inflatable bag, when inflated, compressing said spring to prevent said spring from forcing said reactant into said reaction chamber.

25. The system of claim 21 , wherein compression of said spring forces closed an outlet of said reaction chamber thereby preventing additional reactant from flowing into an inlet of said reaction chamber.

26. The system of claim 21 , wherein compression of said spring forces waste products that have exited said reaction chamber passed a first check valve and closes a second check valve to close said outlet of said reaction chamber.