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Ammonia Removal for Hydrogen PEM Fuel Cells

Summary

Researchers at Purdue University have developed a novel process for ammonia/hydrogen separation in vehicular proton exchange membrane (PEM) fuel cell applications. Through a dual process of ammonia absorption using recycled water from the fuel cell and adsorption through activated carbon, the weight penalty of the hydrogen purification system can be minimized. In addition, the combination of absorption and adsorption allows this technique to remain effective for a much longer time before ammonia concentrations rise above acceptable levels as compared to either absorption or adsorption alone. This allows for the continued delivery of ultrahigh purity hydrogen with minimal purification system weight.

Technology Benefits

High hydrogen capacityMinimal extra weight Remains effective for long time

Technology Application

Green TechnologyHydrogen Storage

Detailed Technology Description

Arvind VarmaPurdue Chemical Engineering

Countries

United States

Application No.

None

Country/Region

USA

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