High pressure adsorptive separation of ethylene and ethane on Na-ETS-10

Previously, we reported that Na-ETS-10 can be used to separate a mixture of ethylene and ethane from an industrial process stream under low pressure (101 kPa) with a binary bed selectivity of 5 at 298 K and 101.3 kPa. In this study, we show that selectivity improves considerably under high pressure...

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Bibliographic Details
Published in:Chemical engineering science 2011-06, Vol.66 (12), p.2817-2822
Main Authors: Shi, Meng, Avila, Adolfo M., Yang, Fan, Kuznicki, Tetyana M., Kuznicki, Steven M.
Format: Article
Language:English
Subjects:
adsorbents
Adsorption
Applied sciences
Chemical engineering
Column packings
desorption
Ethane
Ethylene
ETS-10
Exact sciences and technology
Gases
High pressure
Low pressure
Selectivity
Separation
Separations
Streams
temperature
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Summary:Previously, we reported that Na-ETS-10 can be used to separate a mixture of ethylene and ethane from an industrial process stream under low pressure (101 kPa) with a binary bed selectivity of 5 at 298 K and 101.3 kPa. In this study, we show that selectivity improves considerably under high pressure conditions. Na-ETS-10 was used as a packed bed adsorbent to separate an ethylene/ethane 59/41 mixture over a pressure range of 101–2580 kPa and at two different temperatures (273 and 298 K). At these pressures, pure ethane gas raffinate streams prior to ethylene breakthrough are obtained. The extract phase obtained following desorption from the packed bed column contained up to 94% ethylene. The separation performance improved as adsorption column pressures increased. The ethylene/ethane bed selectivity achieved at 298 K and 2580 kPa was ∼11, more than double the previously reported selectivity under low pressure.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2011.03.046