DOI

  • Thais Grancha
  • Marta Mon
  • Jesús Ferrando-Soria
  • Jorge Gascon
  • Beatriz Seoane
  • Enrique V. Ramos-Fernandez
  • Donatella Armentano
  • Emilio Pardo

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.

Original languageEnglish
Pages (from-to)11032-11039
Number of pages8
JournalJournal of Materials Chemistry A
Volume5
Issue number22
DOIs
Publication statusPublished - 4 May 2017

ID: 26738087