成果報告書詳細
管理番号20130000000762
タイトル*平成24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
公開日2013/10/18
報告書年度2012 - 2012
委託先名国立大学法人宇都宮大学 国立大学法人大阪大学 学校法人芝浦工業大学 JX日鉱日石エネルギー株式会社 千代田化工建設株式会社 国立大学法人名古屋工業大学 株式会社ノリタケカンパニーリミテド  日立造船株式会社 一般財団法人ファインセラミックスセンター 三菱化学株式会社 国立大学法人山口大学 学校法人早稲田大学
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
英文要約Membrane separation using zeolite would offer us great opportunities to reduce energy demands revolutionary in future chemical and petroleum industries. In this project, our target is developing fundamental technologies of zeolite membranes for application to important chemical processes such as dehydration of 2-propanol (IPA) and acetic acid (AcOH).
The dehydration of IPA requires a large amount of energy by distillation because relative volatility of water and IPA is close and IPA forms azeotrope with water at about 14 %(wt) of water. FAU type zeolite membrane is one of the strong candidates for the dehydration of IPA stream under the conditions containing fairly larger fractions of water. In the 2012 FY, we have been rmation process, the interaction among seed FAU zeolite particles and between FAU zeolite seed particles and porous alumina support surface are important.
Zeta-potentials and mean particle sizes of USY slurry and --alumina support were measured. The pH was adjusted by HCl and NaOH. The support used was a porous --alumina tube (inside diameter = 7 mm, outside diameter = 10 mm, length = 30 mm, average pore size = 0.15 -m). A NaY membrane was prepared by a secondary growth method. Changes of zeta-potential and mean particle size of USY slurry were significant as a function of pH. Such repulsion and attractive forces working between zeolite particles and support surface, and among seed particles governs the thickness and compactness of resultant membrane. Vapor permeation and separation measurements of water/ IPA mixtures were performed at 373-423K. The compact membrane prepared in this study showed high water permeances. In addition, water/IPA selectivity reached ca.3000.
Regarding the dehydration of AcOH, in this FY2012, we studied the preparation mordenite thi layer on Y-type zeolite membrane. A thin mordenite layer was successfully prepared on the surface of Y-type zeolite membrane. Such hybrid membranes fully prohibited the permeation of acetic acid and showed improved water permeances.
Nitrogen adsorption was successfully carried out without destroying the membranes. The nitrogen adsorption isotherms obtained in this study suggested that boundaries of zeolite crystals in the membrane strongly influenced the adsorption behavior of nitrogen. In particular, mismatching of crystal faces at the boundaries is indicated to be important essentially to control permeability, because molecules have to pass through such crystal boundaries. The adsorption test would be a very useful method to understand the membrane structure.
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