Optimization of Metal Alloy for High Pressure Hydrogen Separation Membrane

75201-One of the technological barriers to developing an efficient, low-cost hydrogen separation membrane technology is hydrogen-induced rupture associated with the hydrogen-permeable metal membrane. This project will develop a robust metal-alloy membrane that can efficiently separate hydrogen under high H2 pressure without breaking. Various metal alloys will be systematically screened as candidates for the membrane material. The key issue is whether the proper metal alloy can improve the membrane¿s resistance to hydrogen-induced embrittlement without sacrificing high hydrogen permeability. In Phase I, various metal alloys will be prepared and fabricated into dense hydrogen transport metal membranes. Hydrogen permeation through such membranes will be systematically tested at high hydrogen pressure (up to 35 bars) in a temperature range of 250-350(C. Alloys that display both excellent hydrogen permeability and good resistance toward hydrogen-induced embrittlement will be identified for further study in Phase II. Commercial Applications and Other Benefits as described by the awardee: Improved hydrogen transport membranes, suitable for use at high pressure and relatively low temperature, should be applicable for hydrogen separation and purification from a variety of industrial feed streams. Advantages of this membrane technology include low cost, robustness, and high efficiency.