Adsorptive Separation of Acetylene from Light Hydrocarbons by Mesoporous Iron Trimesate MIL-100(Fe)

Ji Woong Yoon, Ji Sun Lee, Sukyung Lee, Kyoung Ho Cho, Young Kyu Hwang, Marco Daturi, Chul Ho Jun, Rajamani Krishna, Jong San Chang

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Abstract

A reducible metal-organic framework (MOF), iron(III) trimesate, denoted as MIL-100(Fe), was investigated for the separation and purification of methane/ethane/ethylene/acetylene and an acetylene/CO2 mixtures by using sorption isotherms, breakthrough experiments, ideal adsorbed solution theory (IAST) calculations, and IR spectroscopic analysis. The MIL-100(Fe) showed high adsorption selectivity not only for acetylene and ethylene over methane and ethane, but also for acetylene over CO2. The separation and purification of acetylene over ethylene was also possible for MIL-100(Fe) activated at 423K. According to the data obtained from operando IR spectroscopy, the unsaturated FeIII sites and surface OH groups are mainly responsible for the successful separation of the acetylene/ethylene mixture, whereas the unsaturated FeII sites have a detrimental effect on both separation and purification. The potential of MIL-100(Fe) for the separation of a mixture of C2H2/CO2 was also examined by using the IAST calculations and transient breakthrough simulations. Comparing the IAST selectivity calculations of C2H2/CO2 for four MOFs selected from the literature, the selectivity with MIL-100(Fe) was higher than those of CuBTC, ZJU-60a, and PCP-33, but lower than that of HOF-3.

Original languageEnglish
Pages (from-to)18431-18438
Number of pages8
JournalChemistry - A European Journal
Volume21
Issue number50
DOIs
Publication statusPublished - 2015 Dec 7

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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    Yoon, J. W., Lee, J. S., Lee, S., Cho, K. H., Hwang, Y. K., Daturi, M., Jun, C. H., Krishna, R., & Chang, J. S. (2015). Adsorptive Separation of Acetylene from Light Hydrocarbons by Mesoporous Iron Trimesate MIL-100(Fe). Chemistry - A European Journal, 21(50), 18431-18438. https://doi.org/10.1002/chem.201502893