Adsorption of Light Alkanes and Alkenes on Activated Carbon and Zeolite 13X at Low Temperatures

Adsorption of Light Alkanes and Alkenes on Activated Carbon and Zeolite 13X at Low Temperatures

The separation of short-chained alkanes and alkenes is challenging because of their chemical similarity and thus being costly in energy. The implementation of a cryogenic adsorption process may overcome this problem, but systematic studies on light hydrocarbon adsorption at low temperatures are virt...

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Veröffentlicht in:Journal of chemical and engineering data 2020-02, Vol.65 (2), p.706-716
Hauptverfasser: Schmittmann, Sonja, Pasel, Christoph, Luckas, Michael, Bathen, Dieter
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creator Schmittmann, Sonja
Pasel, Christoph
Luckas, Michael
Bathen, Dieter
description The separation of short-chained alkanes and alkenes is challenging because of their chemical similarity and thus being costly in energy. The implementation of a cryogenic adsorption process may overcome this problem, but systematic studies on light hydrocarbon adsorption at low temperatures are virtually lacking. Therefore, as a first step, in this paper, we present single-component adsorption isotherms of ethane, ethylene, propane, and propylene on activated carbon (AC) and zeolite 13X for temperatures of −80 to +20 °C and partial pressures of 5–1250 Pa. Based on these experimental data, the interactions of the adsorptives with the chemically different surfaces and their temperature dependence are discussed. Results show a strong increase in capacity with decreasing temperature for both AC and zeolite 13X. Cryogenic adsorption increases the overall (calculated) selectivity of alkane–alkene separation, especially for the zeolite 13X.
doi_str_mv 10.1021/acs.jced.9b00948
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title Adsorption of Light Alkanes and Alkenes on Activated Carbon and Zeolite 13X at Low Temperatures
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