Ethane Selective IRMOF-8 and Its Significance in Ethane-Ethylene Separation by Adsorption
authors Pires, J; Pinto, ML; Saini, VK
nationality International
journal ACS APPLIED MATERIALS & INTERFACES
author keywords adsorption; porous materials; metal-organic framework; ethane; ethylene; IRMOF-8
keywords METAL-ORGANIC FRAMEWORKS; POROUS MATERIALS; CARBON-BLACK; MIXTURES; SIMULATION; STORAGE; CLAYS; ZIF-7; GAS
abstract The separation of ethylene from ethane is one of the most energy-intensive single distillations practiced. This separation could be alternatively made by an adsorption process if the adsorbent would preferentially adsorb ethane over ethylene. Materials that exhibit this feature are scarce. Here, we report the case of a metal-organic framework, the IRMOF-8, for which the adsorption isotherms of ethane and ethylene were measured at 298 and 318 K up to pressures of 1000 kPa. Separation of ethane/ethylene mixtures was achieved in flow experiments using a IRMOF-8 filled column. The interaction of gas molecules with the surface of IRMOF-8 was explored using density functional theory (DFT) methods. We show both experimentally and computationally that, as a result of the difference in the interaction energies of ethane and ethylene in IRMOF-8, this material presents the preferential adsorption of ethane over ethylene. The results obtained in this study suggest that MOFs with ligands exhibiting high aromaticity character are prone to adsorb ethane preferably over ethylene.
publisher AMER CHEMICAL SOC
issn 1944-8244
year published 2014
volume 6
issue 15
beginning page 12093
ending page 12099
digital object identifier (doi) 10.1021/am502686g
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000340446300036
link 25010787
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journal impact factor 8.097
5 year journal impact factor 8.284
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