Experimental studies of hydrocarbon separation on zeolites, activated carbons and MOFs for applications in natural gas processing

Yang, Y, Burke, N, Ali, S, Huang, S, Lim, S and Zhu, Y 2017, 'Experimental studies of hydrocarbon separation on zeolites, activated carbons and MOFs for applications in natural gas processing', RSC Advances, vol. 7, no. 21, pp. 12629-12638.


Document type: Journal Article
Collection: Journal Articles

Title Experimental studies of hydrocarbon separation on zeolites, activated carbons and MOFs for applications in natural gas processing
Author(s) Yang, Y
Burke, N
Ali, S
Huang, S
Lim, S
Zhu, Y
Year 2017
Journal name RSC Advances
Volume number 7
Issue number 21
Start page 12629
End page 12638
Total pages 10
Publisher Royal Society of Chemistry
Abstract Separation of minor hydrocarbon components in natural gas is necessary prior to liquefaction to avoid operational (plugging of equipment) and product specification issues. While there have been many studies describing adsorption of gases on solid materials there have been relatively few focused on decreasing concentrations of light hydrocarbons in methane in non-equilibrium experimental configurations. In order to best understand the chemistry of competitive adsorption of saturated hydrocarbons for gas processing applications we investigated light hydrocarbon dynamic adsorption properties on 16 solid adsorbents of different structures and chemistries. The best adsorbents, as determined by adsorption capacity, were tested for their ability to separate higher molecular weight hydrocarbons from methane. It is found that for charged frameworks, the induced dipole moment between the adsorbent and adsorbate plays the most important role in adsorption capacity. For uncharged frameworks, pore size plays the critical role in adsorption: micropores are more effective than mesopores. For separation of mixtures of methane, ethane, propane and butane, the kinetics of adsorption must also be considered. Of the materials tested, a carbon derived from coal and activated with steam (carbon #5 (37771)), zeolite KX and zeolite 5A were the best in terms of adsorption and separation capability. These materials show promise for separating light hydrocarbons of similar chemical nature.
Subject Chemical Engineering not elsewhere classified
Keyword(s) Metal-Organic Framework
Mesoporous Silica
X-Zeolites
Adsorption
Cations
Propane
Potassium
DOI - identifier 10.1039/c6ra25509d
Copyright notice © 2017 The Royal Society of Chemistry.
ISSN 2046-2069
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