NDLI: Selective adsorption of ethylene over ethane and propylene over propane in the metal–organic frameworks M<sub>2</sub>(dobdc) (M = Mg, Mn, Fe, Co, Ni, Zn)

Content Provider	Royal Society of Chemistry (RSC)
Author	Long, Jeffrey R. Bloch, Eric D. Queen, Wendy L. Brown, Craig M. Geier, Stephen J. Mason, Jarad A. Hudson, Matthew R.
Copyright Year	2013
Abstract	A significant reduction in the energy costs associated with the cryogenic separation of ethylene–ethane and propylene–propane mixtures could potentially be realized through the use of selective solid adsorbents that operate at higher temperatures. The metal–organic frameworks M2(dobdc) (M = Mg, Mn, Fe, Co, Ni, Zn; dobdc4− = 2,5-dioxido-1,4-benzenedicarboxylate) are of particular interest for this application, owing to their high density of coordinatively unsaturated M2+ cation sites that can selectively interact with unsaturated hydrocarbons. Here, we present gas adsorption data for ethylene, ethane, propylene, and propane at 45, 60, and 80 °C for the entire series. The means of sample preparation and activation is found to be important for achieving high separation selectivities and capacities. While all of the compounds investigated show good performance characteristics, Fe2(dobdc) and Mn2(dobdc) exhibit the highest selectivities for the separation of ethylene–ethane and propylene–propane mixtures, respectively. Crystal structures determined from neutron powder diffraction data elucidate the binding of ethane, ethylene, and propylene in Mn2(dobdc) and Co2(dobdc).
Starting Page	2054
Ending Page	2061
Page Count	8
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	4
Issue Number	5
Journal	Chemical Science
DOI	10.1039/c3sc00032j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Propene Adsorption Neutron diffraction Interaction Cryogenics Ethylene Ion Powder diffraction Propane
Content Type	Text
Resource Type	Article
Subject	Chemistry

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