Gentlemen, what is the principle behind constant-temperature hydrogen release? Why does hydrogen gas escape?
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Isotemporal hydrogen evolution: why does hydrogen gas escape?
It’s mainly a solubility issue; just as you keep the temperature below 50°C to maintain high solubility, a lower temperature reduces solubility
When the temperature reaches the level at which spontaneous combustion occurs, it dissolves
At high temperatures, hydrogen molecules enter molybdenum-based steel. If the temperature and pressure are reduced too quickly, the hydrogen molecules cannot be released from the steel structure, which damages the molecular structure of the material and leads to hydrogen embrittlement.
The answer is incorrect. Your question is about why it escapes, and it is related to the structure and size of the molecule. Hydrogen molecules are small; as long as the pressure is below 1/4 of the operating pressure and the temperature of the reaction system is at least 96 degrees Celsius, this phenomenon occurs. The purpose is to prevent thermal expansion and contraction of molybdenum alloy steel, so that hydrogen molecules cannot be released from the material
Depending on the material of the reactor, there is a specified minimum temperature for the tower wall; moreover, the pressure must be at least one-fourth of the operating pressure. Within a certain range of pressure and temperature, the solubility of hydrogen decreases as the temperature drops
During the production of the device, the temperature in the reactor is high, causing the metal crystal structure within the reactor to expand. Hydrogen gas dissolves in the reactor walls; if the temperature and pressure are reduced too quickly, the hydrogen gas cannot be released. In other words, it gets trapped inside, which affects the lifespan of the reactor