Catalyst for hydrogen production equipment
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The documentation states that the catalyst in the hydrogen production unit must never come into contact with reducing gases on its own. What I want to ask is: what does it mean that it cannot be exposed to reducing gases alone? Does it mean that there must also be oxidizing gases among the gases it is exposed to, or can neutral gases be used as well?
The active component of the medium-temperature catalyst is Fe3O4; when exposed alone to reducing gases such as hydrogen, the catalyst tends to be over-reduced to elemental Fe. Steam must be introduced first as a protective gas before introducing the reducing gas.
If I remember correctly, a H2O/H2 ratio greater than 0.2 should be sufficient to ensure that excessive reduction does not occur