Issues with the new hydrogen control indicators
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One of the criteria for new hydrogen is that CO+CO2 ≤ 20 ppm; what are the hazards if this value exceeds 20 ppm? What is the principle behind it? Thank you!
The methanation reaction occurs under the action of a catalyst, releasing large amounts of heat, and carbonyl compounds are produced from the catalyst metal
Since the indicator is abnormally high above the normal range, what you should worry about is whether there is a problem with the PSA adsorbent used for hydrogen production
A methanation reaction occurs; for the specific chemical formula, please search on Baidu. A large amount of heat is generated, causing the temperature of the bed to rise. It will also damage the catalyst
When carbon monoxide is hydrogenated, methane and water are produced; three parts of hydrogen are required for each part of carbon monoxide. Not only is hydrogen consumed, but a large amount of heat is also generated, causing the temperature in the reaction system to rise sharply and disrupting normal operation. Excess levels of carbon monoxide can lead to catalyst poisoning – when the hydrogen contains 2% carbon monoxide, the catalyst’s activity can decline rapidly. The presence of carbon dioxide not only reduces the purity of hydrogen but also reacts with the ammonia produced by hydrogenation to form ammonium salts, which crystallize at low temperatures and block the pipes, increasing the system pressure drop. Generally, the carbon dioxide content in fresh hydrogen is required to be less than 0.5%.
Methane reactions primarily occur, which leads to an increase in the bed temperature and thus inhibits the reaction.