Ammonia (gaseous) at a certain temperature and pressure, under the action of the catalyst cracking into 75% hydrogen and 25% nitrogen, and absorb 21.9 kcal heat, the whole process is endothermic reaction, increasing the temperature is conducive to ammonia cracking, while it is the reaction of volume expansion, reducing the pressure is conducive to the decomposition of ammonia, generally controlled at about one atmospheric pressure. The optimum temperature is between 800-850 ° C. Due to the requirements of use, the air source must be pressurized and palladium-catalyzed deoxygenation (added part).

The purity of the cracked hydrogen in the hydrogen production equipment of the ammonia decomposition furnace is very high, and the co-medium volatile impurities only have a small amount of residual ammonia and water, so it is only necessary to remove a small amount of residual ammonia and water to obtain a high purity gas. Variable-temperature adsorption technology was used for gas purification. Variable temperature adsorption (TSA) technology is a gas separation and purification process based on the different adsorption properties of gas molecules on the internal surface of adsorbent (porous solid substance) at different temperatures. The impurity gas is adsorbed at room temperature and desorbed at heating. The surface of the molecular sieve is full of micropores, and it can absorb water and impurities equivalent to 20% of its own weight at normal temperature and pressure (static adsorption) to obtain product gas with qualified purity and impurity content.



The surface of the molecular sieve is full of micropores, at normal temperature and pressure can be adsorbed equivalent to 20% of its own weight (static adsorption of water and impurities, and at a temperature of about 350 ° C, the ammonia decomposition furnace hydrogen production equipment can be regenerated completely, and the purification device is automatically switched every 24 hours under the control of the valve to obtain the product gas with qualified purity and impurity content.