Olefin Selective Ag-Exchanged X-Type Zeolite Membrane for Propylene/Propane and Ethylene/Ethane Separation

Motomu Sakai, Yasuhito Sasaki, Taisuke Tomono, Masahiro Seshimo, Masahiko Matsukata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Propylene/propane and ethylene/ethane separation was examined with Ag-exchanged X-type zeolite membrane (Ag-X membrane). The Na-X membrane was prepared on a porous tubular α-alumina support by a secondary growth method. The resulting Na-X membrane was ion-exchanged by using AgNO3 aq. Olefin selectivities in both mixtures were markedly improved after the ion exchange from Na to Ag cation. The Ag-X membrane exhibited a maximum propylene selectivity of 55.4 with a permeance of 4.13 × 10-8 mol m-2 s-1 Pa-1 at 353 K for a propylene/propane (50:50) mixture. This membrane also exhibited a maximum ethylene selectivity of 15.9 with a permeance of 9.04 × 10-8 mol m-2 s-1 Pa-1 at 303 K for an ethylene/ethane (50:50) mixture. We consider that the strong interaction between olefin and Ag cation plays an important role for the appearance of such high selectivity of olefin.

Original languageEnglish
Pages (from-to)4145-4151
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number4
DOIs
Publication statusPublished - 2019 Jan 30

Fingerprint

Zeolites
Propane
Ethane
Alkenes
Olefins
Propylene
Ethylene
Membranes
Cations
Positive ions
Aluminum Oxide
Ion exchange
Alumina
ethylene
propylene
Ions

Keywords

  • ethylene
  • FAU
  • gas separation
  • membrane
  • propylene
  • zeolite

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Olefin Selective Ag-Exchanged X-Type Zeolite Membrane for Propylene/Propane and Ethylene/Ethane Separation. / Sakai, Motomu; Sasaki, Yasuhito; Tomono, Taisuke; Seshimo, Masahiro; Matsukata, Masahiko.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 4, 30.01.2019, p. 4145-4151.

Research output: Contribution to journalArticle

Sakai, Motomu ; Sasaki, Yasuhito ; Tomono, Taisuke ; Seshimo, Masahiro ; Matsukata, Masahiko. / Olefin Selective Ag-Exchanged X-Type Zeolite Membrane for Propylene/Propane and Ethylene/Ethane Separation. In: ACS Applied Materials and Interfaces. 2019 ; Vol. 11, No. 4. pp. 4145-4151.
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