成果報告書詳細
管理番号20100000001837
タイトル*平成21年度中間年報 水素製造・輸送・貯蔵システム等技術開発 水素製造機器要素技術に関する研究開発 CO2膜分離法を用いた水素製造装置改質システムの開発
公開日2011/5/17
報告書年度2009 - 2009
委託先名株式会社ルネッサンス・エナジー・リサーチ 株式会社ミクニ 国立大学法人神戸大学 国立大学法人京都大学 独立行政法人産業技術総合研究所
プロジェクト番号P08003
部署名燃料電池・水素技術開発部
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
現在開発中の水素ステーション用改質システムでは、水蒸気改質により炭化水素を水素、COに改質し、さらにCO変成反応を用いてCOを水素に変換することにより水素を製造している。
その後、燃料電池自動車用の高純度水素を造る為、PSA(プレッシャー・スイング・アドソープション)により水素を精製している。しかし、これらの技術は基本的に大規模水素製造プロセスとして開発されたものであり、天然ガスや石油からオンサイトで水素を製造、供給する水素ステーションにおいては、システムの低コスト化、コンパクト化、高効率化が技術開発の課題となっている。
これら課題を解決するために、本プロジェクトでは、選択的、効率的にCO2の分離が可能なCO2選択透過膜と、高性能なCO変成触媒を組み合わせたCO2分離型メンブレンリアクターの開発を行っている。
英文要約Title: Development of System for Hydrogen Production, Transportation and storage. Development of Elemental Technologies for Hydrogen Production Apparatus. Development of advanced reforming system for H2 station using CO2 selective membrane (FY2008-FY2013) FY2009 Annual Report
In this project, for the purpose of making hydrogen stations more efficient, compact and low in cost, we are carrying out the development of a membrane reactor, which combines CO2 selective membranes and CO shift catalysts. In the former project, we successfully developed novel facilitated transport membranes with excellent performances exceeding our target values, i.e. CO2 permeance of 1x10^-4mol/(m^2skPa) and CO2/H2 selectivity of 100 at 160 degree Celsius. Last year, we succeeded in developing a heat-resistant membranes which have CO2 permeance of 1x10^-4mol/(m^2skPa) and CO2/H2 selectivity of 200 at 180 degree Celsius. However, at temperature region of more than 180 degrees Celsius, a degradation of the CO2 permeance was observed from early period of operation, so heat resistance of the CO2 selective membranes was not enough. This year, we tried to improve the heat resistance of the CO2 selective membrane and drastically improved the heat resistance of it. As a result, we succeeded in developing of heat resistant membrane with long term stability at 170 degree Celsius and with a potential to be applicable at 180 degree Celsius. As for the development of CO shift catalysts, in the former project, we developed a precious metal-based CO shift catalysts which have high activity for the CO shift reaction at low temperatures and are applicable to membrane reactors. This year, we tried to improve resistance against CO2 poisoning of Cu-based catalyst and succeeded in improving resistance against CO2 by adding another metal to standard Cu-ZnO-Al2O3 catalyst. Other items concerning CO shift catalyst are reducing precious metal content in the high performance precious metal based CO shift catalysts. We tried to develop high performance precious metal CO shift catalysts with smaller precious metal content using an approach combinatorial chemistry and succeeded in reducing precious metal content to one-third of the precious metal content of original catalysts. As for the study of total system of hydrogen station, last year, we confirmed using membrane reactor, we can make the hydrogen station compact and also reduce the driving cost of the hydrogen station remarkably. This year, we updated PSA design using the latest absorbents for PSA and improved design of membrane reactor based on the latest PSA study. We started optimizing the design of membrane reactor and the total system and are going to construct a demonstration plant of advanced hydrogen station using membrane reactor next year based on the optimized design.
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