Amonyaktan daha verimli saf hidrojen elde etmek

Ammonia can carry hydrogen in a form that is easier to store and transport than compressed or liquefied hydrogen gas. Recovering the hydrogen, however, normally requires temperatures above 500 degrees Celsius, followed by an energy-intensive purification stage. MIT researchers have demonstrated an electrochemical system that addresses both difficulties at once. A catalyst first releases hydrogen from ammonia. A palladium membrane then allows only hydrogen to pass, while an electrical gradient pulls it from a dilute mixture and helps it recombine as pure gas on the other side. Continually removing hydrogen also encourages the original reaction to proceed at roughly 200 to 300 degrees Celsius. The method worked with both ammonia and a liquid organic hydrogen carrier, suggesting that the underlying principle could have wider uses. Nevertheless, it is not yet ready for large-scale deployment: palladium is costly, and the team still needs to reduce the amount required and scale up the equipment.