成果報告書詳細
管理番号20100000001515
タイトル*平成21年度中間年報 新エネルギー技術研究開発 バイオマスエネルギー等高効率転換技術開発(転換要素技術開発) 高分子膜モジュールを用いたセルロース系バイオエタノール濃縮・膜脱水システムの研究開発
公開日2010/9/9
報告書年度2009 - 2009
委託先名日東電工株式会社
プロジェクト番号P07015
部署名新エネルギー技術開発部
和文要約和文要約等以下本編抜粋:1.耐久性高分子膜モジュールの研究開発 a)最適部材の選定と実証 【不織布およびスペーサー】 バイオエタノール処理用膜モジュール部材には、使用条件からエタノール耐性、耐熱性、耐加水分解性が求められる。これまで国内外各メーカーから種々の不織布サンプル、スペーサーサンプルを取り寄せ130℃高温水蒸気下および130℃エタノール蒸気下での強度変化の測定を行い、ある程度耐性を有する材料としてPPS、PEK、PP、PETに絞り込み、130℃エタノール蒸気下での長期耐久性試験を行っている。 不織布では、PEK、PET、PPが数百時間のレベルで劣化が生じたのに対し、PPSが他に比べ変化が小さく曝露2000時間を越え確認継続中である。スペーサーネットも同様にPPS製の平織ネットが暴露2000時間まで強度安定で推移している。その他、耐久性で有望な材料としてH社製のPPS不織布、スペーサーではPPS製のトリコットネットおよびECTFE製成形ネットを追加し1000時間以内であるが劣化の傾向は見られておらず耐久性試験を継続中である。
英文要約1. R&D of highly Durable Polymer Membrane Module a) Selection and Demonstration of Optimum Components: We conducted exposure test of various types of module materials at high temperature and under a highly concentrated ethanol atmosphere to examine how much they have ethanol resistance. As the test result, it is confirmed that PPS is the most applicable material to non-woven fabric and spacer. While, in a heat resistance adhesive material test, silicon resin is now considered. b) Optimization of Module Structure: To establish highly efficient and reliable module structure, we conducted a correlation examination between the structure and permeability performance of membrane by simulation study, a study for reduction of pressure drop on a permeate spacer and an analysis of thermal stress applied to inside module with finite element analysis in a hot environment. c) Module Characterization and Feedback into Module Designing: To evaluate separation performance and permeability of membranes used for a module and examine ethanol vapor resistance, we manufactured evaluation equipment for the sheet membranes. 2. R&D of Energy-Saving Concentration and Dehydration System that Uses Polymer Membrane a) Development of Simulation Software for Membrane Dehydration System: A computation module for membrane characteristics was installed into a software "CHEMCAD" and which enabled energy simulation for total process flow of a concentration and dehydration. b) Study for Total Basic Process Flow and Optimization of Detailed Parameter: Contaminant concentration simulation in rectifier distillate and simulation for the total energy consumption were initiated. From the study, it is cleared that formic acid and acetaldehyde were concentrated to more than seven times as the initial concentration and fed into polymer membrane module. 3. R&D of Measures to Prevent Impurities from Destabilizing Operation of Dehydration System a) Contaminant Analysis in Ethanol Production Process: The major contaminant generating from biomass is produced in biomass pre-treatment and fermentation process. To inspect actually generated contaminants, a dilute sulfuric acid method, which has been actively used as biomass pre-treatment, was applied. As a lignocellulosic biomass model, powdered rice straws were heated in 1% sulfuric acid solution at 160degree for 20 minutes. After neutralization by Ca(OH)2, formic acid, acetic acid and furfural were detected in the process liquid. Also, in profiling analysis by GC-MS, a great deal of other minor components was obtained as a by-product. b) Identification of Contaminants and Development of Method for Preventing Membrane Fouling: Ethanol fermentation was performed with pentose assimilating yeast that was extracted from process liquid of rice straw. As a result, the ethanol fermentation ability was confirmed and we succeeded in obtaining the test liquid including all candidate substances that may cause membrane fouling in an actual ethanol production process.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る