Patent ID: 7364912

Claim:
A method for controlling the flow of hydrogen and ammonia from a hydrogen generator during a breakthrough, the method comprising: providing a housing forming a chamber, the housing having an inlet and outlet; packing the chamber of the housing with hydrated copper (II) chloride; moving the flow of hydrogen and ammonia into the hydrated copper (II) chloride packed in the chamber of the housing; wherein the hydrated copper (II) chloride is packed within the chamber of the housing with sufficient density to allow the flow of hydrogen and ammonia to pass through the hydrated copper (II) chloride when ammonia is below a breakthrough concentration and to allow the formation of the gas impermeable plug when at least the breakthrough concentration of ammonia within the flow reacts with the hydrated copper (II) chloride, thus preventing the flow of hydrogen and ammonia from exiting the outlet of the housing by blocking the flow with the gas impermeable plug.