Propylene/propane Permeation Properties of Metal-doped Organosilica Membranes with Controlled Network Sizes and Adsorptive Properties

• KANEZASHI Masakoto

  Dept. of Chemical Engineering, Graduate School of Engineering, Hiroshima University

• MIYAUCHI Shuji

  Dept. of Chemical Engineering, Graduate School of Engineering, Hiroshima University

• HAYAKAWA Shinjiro

  Dept. of Applied Chemistry, Graduate School of Engineering, Hiroshima University

• NAGASAWA Hiroki

  Dept. of Chemical Engineering, Graduate School of Engineering, Hiroshima University

• YOSHIOKA Tomohisa

  Dept. of Chemical Engineering, Graduate School of Engineering, Hiroshima University

• TSURU Toshinori

  Dept. of Chemical Engineering, Graduate School of Engineering, Hiroshima University

Bibliographic Information

Other Title

• ネットワークサイズと吸着性を制御した金属ドープオルガノシリカ膜のプロピレン／プロパン透過特性
• Propylene/propane permeation properties of metal-doped organosilica membranes with controlled network size and adsorption properties

Abstract

Metal-doped organosilica membranes for C₃H₆/C₃H₈ separation were fabricated via a sol-gel method. Al and Ag was selected as a doping material in the fabrication of metal-doped bis (triethoxysilyl) methane (BTESM) membranes, and the effects that doping materials exerted on the organosilica network size and on the C₃H₆/C₃H₈ permeation properties were evaluated. Gas permeance ratios such as H₂/CH₄, H₂/C₃H₆, H₂/C₃H₈, and C₃H₆/C₃H₈ were approximately independent of Ag concentration, indicating that network size did not change when doped Ag existed as Ag ions in BTESM networks, as suggested by the X-ray absorption fine structure (XAFS) spectrum. On the other hand, when Al was doped into BTESM, each permeance decreased as Al concentration increased, and the selectivity (H₂/N₂, H₂/CH₄) increased largely because of enhanced molecular sieving separation by densified networks. Ag-BTESM membranes showed negative values for activation energy (∼−10 kJ mol⁻¹) for C₃H₆ permeation, which were a much smaller values than those for BTESM (∼−7 kJ mol⁻¹) and Al-BTESM (∼3 kJ mol⁻¹) membranes. BTESM, Al-, and Ag-BTESM membranes showed values for α_mix (binary separation) that were higher than those for α_sin (single permeation) at 50 °C. For example, Ag-BTESM (Si/Ag = 9/1) membrane showed higher C₃H₆/C₃H₈ selectivity (= 32.5) by binary separation than selectivity (∼19) by single permeation at 50 °C, but the selectivity by binary separation was approximately the same, irrespective of a different pressure ratio (feed pressure/permeate pressure).

Journal

• Journal of the Japan Petroleum Institute

  Journal of the Japan Petroleum Institute 59 (4), 140-148, 2016-07-01

  The Japan Petroleum Institute

Keywords

• Organosilica membrane
• Propylene/propane separation
• Metal doping
• Molecular sieving property
• Adsorption

Details

• CRID: 1390282680167727872
• NII Article ID: 130005262956
• NII Book ID: AA11590615
• DOI: 10.1627/jpi.59.140
• ISSN: 1349273X
• ISSN: 13468804
• NDL BIB ID: 027516428
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027516428
• Web Site: https://www.jstage.jst.go.jp/article/jpi/59/4/59_140/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed