The system vaporizes liquid ammonia, and heats it with a catalyst until decomposition occurs, creating a mixture of gas consisting of 75% hydrogen and 25% nitrogen. Based on the principle that the molecular sieve adsorbs ammonia and water at different temperatures, high purity gas is produced by heat regenerating through the mixture working at normal temperature.Hydrogen production 5-500nm3/h Impurity oxygen 2ppm Residual ammonia 3ppm Dew point -65°c Working pressure 0.05-0.2mpa