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Issue 22, 2017
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Tuning the selectivity of light hydrocarbons in natural gas in a family of isoreticular MOFs

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Abstract

Purification of methane from other light hydrocarbons in natural gas is a topic of intense research due to its fundamental importance in the utilization of natural gas fields. Porous materials have emerged as excellent alternative platforms to conventional cryogenic methodologies to perform this task in a cost- and energy-efficient manner. Here we report a new family of isoreticular chiral MOFs, prepared from oxamidato ligands derived from natural amino acids L-alanine, L-valine and L-leucine, where, by increasing the length of the alkyl residue of the amino acid, the charge density of the MOF's channels can be tuned (1 > 2 > 3), decreasing the adsorption preference towards methane over light hydrocarbons thus improving this purification process. The validity of our rational design strategy has been proved by a combination of single-component adsorption isotherms, adsorption kinetics of CH4, C2H6, C3H8 and n-C4H10, and breakthrough experiments of binary CH4/C2H6 and CH4/C3H8 mixtures.

Graphical abstract: Tuning the selectivity of light hydrocarbons in natural gas in a family of isoreticular MOFs

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Supplementary files

Article information


Submitted
07 Feb 2017
Accepted
04 May 2017
First published
04 May 2017

J. Mater. Chem. A, 2017,5, 11032-11039
Article type
Paper

Tuning the selectivity of light hydrocarbons in natural gas in a family of isoreticular MOFs

T. Grancha, M. Mon, J. Ferrando-Soria, J. Gascon, B. Seoane, E. V. Ramos-Fernandez, D. Armentano and E. Pardo, J. Mater. Chem. A, 2017, 5, 11032
DOI: 10.1039/C7TA01179B

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