Olefin Recovery by *BEA-Type Zeolite Membrane: Affinity-Based Separation with Olefin−Ag+ Interaction

Motomu Sakai*, Yuto Tsuzuki, Naoyuki Fujimaki, Masahiko Matsukata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Ag+ was introduced into *BEA-type zeolite membrane by an ion-exchange method to enhance olefin selectivity. Ag−*BEA membrane exhibited superior olefin separation performance for both ethylene/ethane and propylene/propane mixtures. Particularly, the separation factor for ethylene at 373 K reached 57 with the ethylene permeance of 1.6×10−7 mol m−2 s−1 Pa−1. Adsorption properties of olefin and paraffin were evaluated to discuss contribution of Ag+ to separation performance enhancement. A strong interaction between olefin and Ag+ in the membrane caused preferential adsorption of olefin against paraffin, leading to selective permeation of olefin. Ag−*BEA membrane also exhibited high olefin selectivities from olefin/N2 mixtures. The affinity-based separation through Ag−*BEA membrane showed a high potential for olefin recovery and purification from various gas mixtures.

Original languageEnglish
Pages (from-to)1101-1105
Number of pages5
JournalChemistry - An Asian Journal
Issue number9
Publication statusPublished - 2021 May 3


  • *BEA
  • ethylene
  • membrane separation
  • propylene
  • zeolite

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry


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