Making manufacturing ultrapure hydrogen gas easier than ever
Pure hydrogen (H2) is an important chemical widely used in the chemical industry, many semiconductor fabrication processes, as well as in Polymer Electrolyte Membrane (PEM) fuel cells. Almost all of the hydrogen (H2) gas generated today comes from the steam reforming of natural gas at oil refineries. However, this process also produces trace amounts of carbon monoxide (CO) byproduct, which limits the application of H2 and can poison or destroy the delicate catalysts used in the manufacture of semiconductor and state-of-the-art fuel cells. Researchers led by Ziyi Zhong and Jizhong Luo from the A*STAR Institute of Chemical and Engineering Sciences in Singapore have now developed a material that purifies H2 gas by catalytically converting CO to carbon dioxide (CO2) while simultaneously removing excess CO2an approach that enables CO removal down to the parts-per-million (ppm) level.