成果報告書詳細
管理番号20110000001311
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(7)
公開日2011/8/30
報告書年度2010 - 2010
委託先名株式会社ノリタケカンパニーリミテド
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 3-2-2 「分離膜用セラミックス多孔質基材の開発」 <研究開発の内容> 水熱法等のケミカルプロセスによる分離膜製膜およびIPA及び酢酸の脱水プロセス条件下で大幅な強度劣化の生じない多孔質材料の開発および、目標分離性能を実現する分離膜を担持可能な細孔径、透過特性、表面平滑性、耐化学特性を有する基材の開発を実施した。本目標を達成するためには、材料開発、製造プロセス開発を行い、その都度特性を評価していかなければならない。
英文要約Development of membranes and membrane modules for highly refined separation technology such as dehydration of iso-propanol (IPA) or acetic acid are the objectives of this program. As a participant, Noritake is responsible for the development of porous ceramic substrates of tubular and multi-channel configurations. In FY2009, three types of porous alumina tubular substrates with symmetric or asymmetric structures were developed. In FY2010, our main aim was to measure and control substrate surface property, thereby making them more suitable for the final processing of zeolite membranes. By using the zeta-potential analyzer introduced at Waseda Univ. in FY 2009, the zeta-potential values of substrates were measured. When we compared the symmetric porous alumina substrate (NS-1) with an asymmetric porous alumina substrate (NA-1) having the same pore size, the values of zeta-potential was found lower for NA-1 than that of NS-1 in the alkaline pH region. On comparing NS-1 and NA-1 samples sintered under varying temperatures, the samples sintered at lower temperature showed higher values of zeta-potential. The seeding of Y-type zeolite on NS-1 having different zeta-potential values was performed. By analyzing the seeded substrate samples, the correlation between zeta-potential and the properties of the seeded layer was studied. Results of the mechanical, chemical and thermal stability studies conducted at Nagoya Institute of Technology (NIT) showed that the substrates should have good durability for practical use in dehydration processes. The rheology of the pre-extrusion dough was studied with a Rheometer introduced in FY2009 and compared with extrusion results. It was found that the control of fluidity is important to prepare the multi-channel type substrates without defects, such as cracks and pin-holes. The mechanical strength of the multi-channel type substrate was evaluated by determination of radial crushing strength, and the distribution of the stress was calculated by finite element method (FEM). We have also prepared intermediate layers with pore sizes similar to NS-2 on the surface of the channels. We have developed glass sealant materials, for the use in membrane modules, with a focus on materials that can seal the substrate below 550 ℃. No gas leakage was detected from the substrates coated with the sealant materials. Hydro-thermal test under the condition of water/IPA=50/50 (wt.%) at 130℃ for 42 hours, resulted in no weight-loss of the sealant materials. Therefore, we believe that the glass sealant should be durable for practical use in dehydration applications.
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