NDLI: Experimental determination of the loss of krypton and xenon in an adsorption purification unit of a contemporary ASU

Content Provider	Springer Nature Link
Author	Arkharov, A. M. Saviv, M. Yu. Vorotyntsev, V. B. Kolpakov, M. Yu. Bobkov, S. V.
Copyright Year	2008
Abstract	Results are provided for a study in a laboratory test unit of the adsorption dynamics for krypton, xenon, ethane and nitrogen hemioxide (lower oxide) from air in two-layer equipment simulating an industrial adsorber of a combined purification unit (CPU) of a contemporary air separation unit (ASU). As a result of the studies, it is established that the loss of krypton in a CPU is insignificant (about 0.25%) and it is mainly determined by the presence of this component in the gas phase (air) at the end of the purification stage before the start of switching over adsorbers. The loss of xenon is more marked and it depends on the ratio of the calculated adsorber operating time (before the start of the breakthrough carbon dioxide) to the actual adsorber operating time in the purification stage. According to experimental data, the maximum loss of xenon is about 8%. The data obtained point to a marked reduction in the loss of gases in a CPU compared with regenerators used in old ASU schemes within which the losses were about 10–11% for krypton and 25–30% for xenon. It has been established by experiment that during operation of adsorbers of an industrial CPU about 18% of nitrogen hemioxide and 10% ethane is retained within them, but methane is hardly retained. The data obtained may be used in designing units for primary enrichment of krypton and xenon in an ASU.
Starting Page	131
Ending Page	137
Page Count	7
File Format	PDF
ISSN	00092355
Journal	Chemical and Petroleum Engineering
Volume Number	44
Issue Number	3-4
e-ISSN	15738329
Language	English
Publisher	Springer US
Publisher Date	2008-08-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Industrial Pollution Prevention Geotechnical Engineering Mineral Resources Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Fuel Technology Chemical Engineering Energy Engineering and Power Technology

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