成果報告書詳細
管理番号20110000001152
タイトル*平成22年度中間年報 グリーン・サステイナブルケミカルプロセス基盤技術開発 規則性ナノ多孔体精密分離膜部材基盤技術の開発(1)
公開日2011/8/30
報告書年度2010 - 2010
委託先名国立大学法人宇都宮大学
プロジェクト番号P09010
部署名電子・材料・ナノテクノロジー部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等 (1) 研究開発の内容 規則性ナノ多孔体の膜化を成功させるためには、支持体の選択、シール法の検討、合成方法の最適条件の探索が重要である。特に、高度な分離が必要になる場合や高温分離操作が必要になる場合には支持体の選択やシール法が、分離プロセスの成否を左右することになる。この問題を解決するために、耐熱性の支持体として多孔質ステンレスを用い、シール法としてテーパー構造を利用することで、高温下での分離を実現するための有効な一策と考え検討を行う。
英文要約Backgroud and Aims
All membranes, regardless of organic or inorganic materials, should be housed in a membrane container. It has been pointed out that the common but important problem is how to fix the membrane with the container so as to establish a gas-tight sealing.
Especially, reliable sealing at higher temperatures has never completed because connection between different materials is not easy in terms of thermal expansion, adhesive force and so on. In this sense, metallic materials are considered to be the most useful for the membrane support as well as the membrane container because of the excellent durability to pressure and temperature and the ease in mechanical cut and shave. Porous metallic support tube can connect to a dense tube by welding, thereby easily fixing with the housing container. A taper-sealing method, in which one-closed support is inserted tightly to a cone-shape part built in the container, will be examined.
Since 2009, appropriate preparation conditions for zeolite membrane, i.e. MFI and FAU types, on a porous metallic support have been searched. This year, an improved hydrothermal synthesis, where the support was hung down in the synthetic solution, was proposed and examined.
Results
From the scanning electron microscope (SEM) observation, both MFI and FAU types of zeolite membranes could be prepared by means of the improved hydrothermal synthesis. First, an MFI type of zeolite was synthesized on a porous stainless-steel support. An MFI with Si/Al ratio of ca. 60 was synthesized to improve its hydrophilic property, whereas a Si/Al of 120 one, prepared last year, showed a hydrophobic property. Performances in the vapor permeation as well as the pervaporation using 80 wt% isopropyl alcohol (IPA) -water solution as feed were tested. As a result, it was found that the membrane could show a permselectivity to water. Second, an FAU (Y) type of zeolite was synthesized on a porous stainless-steel support with 0.5m of average pore diameter. According to a common synthetic procedure, a piece of membrane tube was prepared. As the result of pervaporation, FAU type of zeolite was found to show a hydrophilic property. The separation factor of water
to IPA was lower than that for the alumina supported membrane.
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