CO_2分離のためのゾルーゲル法による金属ドープ多孔性シリカ膜の気体透過特性 Gas Permeation Characteristics of Metal Doped Microporous Silica Membranes for CO_2 Separation Prepared by Metal Salt-added Sol-gel Processing

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Gas permeation properties through silica based metal-doped microporous membranes prepared by the sol-gel method were investigated. In order to control pore size and affinity with permeating gas molecules, especially with CO2 for CO2/N2 gas separation membranes, nitrates of Ni, Al, Mg metals, and ammonium salt of vanadium were added to silica colloidal solutions. The molar ratio of additives, Si/M was 9/1. CO2 and N2 adsorption measurements on pure silica and metal-doped silica powder samples were conducted to estimate the affinity of the membrane materials with those gases. Pure silica and Ni-doped silica showed the largest amount of adsorbed CO2. Ni-doped silica membranes showed no attract difference from a typical pure silica membrane for temperature dependencies of gas permeance, while Mg-doped silica membranes might have relatively smaller effective pores for CO2/N2 separation and the value of permeance ratio of 57 could be obtained at 50 ℃. On the other hand, V-doped silica membranes had larger pores and N2 gas permeance increased with decreasing temperature, which would result in lower performance of CO2 separation. Concerning the Al-doped silica membranes, the affinity with CO2 decreased by addition of Al. In addition, activation energy of He and H2 for permeation on Al-doped membranes became greater, which suggested densification of silica network because of Al dispersion in the dense phase.

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    膜 32(1), 45-53, 2007-01-01 

    THE MEMBRANE SOCIETY OF JAPAN

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各種コード

  • NII論文ID(NAID)
    10018696353
  • NII書誌ID(NCID)
    AN0023215X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03851036
  • NDL 記事登録ID
    8662525
  • NDL 雑誌分類
    ZR2(科学技術--生物学--生化学)
  • NDL 請求記号
    Z18-1127
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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