Why is a hydrogen seal used instead of a nitrogen seal for gasoline hydrogenation buffer tanks?
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Catalytic gasoline hydrogenation
Is it considering the nitrogen purity issue, with a high oxygen content?
If the purity of hydrogen and nitrogen is the same, either one will work. The choice of hydrogen may be driven by considerations regarding the impact on the flare when using it for venting, as well as the issue of recycling the vented gases; a case-by-case analysis is required, and you should consult the personnel responsible for your plant design or the process engineers involved in the design review.
Gasoline hydrogenation involves using hydrogen to increase pressure, with the aim of raising the hydrogen partial pressure； If using nitrogen, there is a concern that it may contain trace amounts of oxygen
If it’s nitrogen, it’s simply vented to the flare. If it’s hydrogen, it should be collected centrally, adsorbed again, and then reused. The nitrogen purity of ordinary devices can be ensured; it’s probably to save costs.
The designer explained that nitrogen was planned to be used, but its purity was insufficient; therefore, hydrogen was chosen instead
The designer explained that nitrogen was planned to be used, but its purity was insufficient; therefore, hydrogen was chosen instead
Considering that hydrogen can be recovered and purified, cost control is possible
Actually, either one will do; the goal is to prevent oxidation from occurring as air passes through. Our device uses nitrogen for this purpose!
Nitrogen can also be used; I use dry gas here, mainly to prevent the raw materials from being oxidized by air