Pre-purification unit of cryogenic air separation unit, hydrocarbon adsorbent, and method of pre-treating feed air
AssigneeTaiyo Nippon Sanso Corporation
InventorsTatsuya Hidano, Morimitsu Nakamura, Masato Kawai
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Abstract
A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure having a Si/Al ratio of no more than 20. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.
Claims3
A pre-purification unit of a cryogenic air separation unit, which is a thermal swing adsorption pre-purification unit comprising a column packed with a propane adsorbent, wherein
- said propane adsorbent comprises a zeolite that has a H-MFI structure, a Ca-MFI structure, or a Zn-MFI structure, and a Si/Al ratio of no more than 20.
Dependencies are inferred from the claim text.