Click picture to enlarge
One. Ammonia decomposition of hydrogen flow description:
Using ammonia as raw materials, ammonia by pyrolysis, the cracking of liquid ammonia per kg can be obtained 2.64Nm3 gas mixture, which contains 75% hydrogen and 25% nitrogen. Fewer impurities from the gas (water vapor containing impurities of about 2 grams / cubic meter, the residual ammonia of about 1000ppm), and then through the sieve (U.S. UOP) adsorption and purification, gas dew point can be reduced to-600C the following, the residual ammonia can be reduced to 3PPM below.
Ammonia cracking hydrogen furnace can be used for non-ferrous metals, steel, chrome steel and stainless steel and other metal materials and parts for bright annealing, decarburization processing silicon steel, copper, iron-based powder metallurgy sintering, vacuum devices burn hydrogen treatment of metal parts , sintering and the protection of semiconductor devices sealed knot, palladium alloy membrane purification of hydrogen feed gas diffusion and so on.
Ammonia readily available raw materials, low cost, low consumption of raw materials. Preparation of ammonia cracker to protect the gas with low investment, small size and high efficiency
II. Ammonia decomposition of hydrogen works:
Ammonia (gas) at a certain temperature, the catalyst (Southwest Hospital Z204) 75% cleavage under the action of hydrogen and 25% nitrogen, and to absorb the 21.9 kcal, the main reaction is:
2NH3-3H2 + N2-21.9 kcal
Due to expansion of the whole process is endothermic reaction, increasing temperature is conducive to ammonia cracking, but it also is expanding the reaction volume, lower pressure is conducive to the decomposition of ammonia, ammonia decomposition of hydrogen to use the best equipment.
III. Hydrogen purification works:
When the ammonia decomposition of hydrogen generated by the equipment again when the hydrogen into the hydrogen purification pass for further purification treatment, high purity hydrogen pyrolysis, in which only a trace amount of residual volatile impurities in ammonia and water, showing only residual ammonia and water to remove trace copies can be obtained with high purity gases.
Using temperature swing adsorption gas purification technology. Temperature swing adsorption (TSA) technology is absorbent (porous solid material) the internal surface of the gas molecules at different temperatures based on different adsorption properties of a gas separation and purification. Room temperature adsorption of impurities in gas, heating gas when the desorption of impurities ,
Microporous zeolite surface are all in the normal temperature and pressure can be attached to the equivalent weight of 20% (static adsorption of water and impurities, while the temperature is about 350 ℃, can be regenerated completely, switch once every 24 hours to get purity and impurity content of the products are qualified gas.
Absorption tower for the alternate use of two towers in parallel, enabling a continuous supply.
LED phosphor restore special purification equipment with ammonia decomposition
