成果報告書詳細
管理番号20120000000360
タイトル*平成23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 水素分離型リフォーマーの高耐久化・低コスト化研究開発(1)
公開日2013/3/20
報告書年度2011 - 2011
委託先名東京瓦斯株式会社
プロジェクト番号P08003
部署名新エネルギー部
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)水素分離型リフォーマーシステムの耐久性向上の研究開発
1水素分離膜の耐久性・信頼性の検証試験
英文要約Title: Development of Technologies for Hydrogen Production, Delivery and Storage Systems. Development of Elemental Technologies for Hydrogen Production Components. Research and Development for Increase of Durability and Cost Reduction of Membrane Reformer (FY2008-FY2012) FY2011 Annual Report (1)
1. Research and development for increase of durability of membrane reformer
1.1. Verification experiment of durability and reliability of membrane reformer
Durability verification test of the 2nd 40 Nm3/h-class membrane reformer system, which has achieved 81.4% HHV efficiency in hydrogen production in the previous NEDO project, has been continued to clarify the issues on stable operations. Since the impurity concentration in product hydrogen was 98 ppm after 4000 hour operation in the last fiscal year, leakages from all sixteen units were measured and eight of them were replaced with new ones because of depleted membrane modules. After the replacement, the system was restarted and operation has been continued. The total operation time reached 5500 hours with 95 times starts and stops, and the product hydrogen purity was over 99.99 vol% with impurity concentration of 17 ppm.
1.2. Research for increase of durability of hydrogen separation membrane
Detailed dismantling investigation of the module used in the 2nd 40 Nm3/h-class membrane reformer system after 4000 hour operation and the improved module tested for 13000 hours in an electric furnace has been already reported. Dismantling investigation of the module used in the 2nd 40 Nm3/h-class membrane reformer system after 8000 hour operation will be held in the next fiscal year.
1.3. Research for increase of reliability of auxiliaries
Solutions for the issues on long-term stability were examined and the auxiliaries of the membrane reformer system were improved. In this fiscal year, two auxiliaries, an oxygen sensor for product hydrogen and water purifying apparatus, were repaired and improved after their troubles, then the stability and reliability of the system has been improved. There were three sudden system shutdowns caused by auxiliaries in this fiscal year and the number of troubles decreased step by step.2. Research and development for a Membrane On Catalyst (MOC) module
2.1 Research for improvement on durability of a MOC module
Long-term hydrogen permeation test and reforming test were carried out with MOC modules. In the hydrogen permeation test, hydrogen permeability was maintained even after about 8000 hour permeation at 550 deg C. However, leakage increased during the test. In the reforming test, the increase of leakage also turned out to be a significant issue with a MOC module.
2.2. Development of an advanced MOC module
To solve the leakage issues on the MOC module descried above, an advanced MOC module and improved operation sequence were developed. Long-term reforming test has been carried out with the advanced MOC module and the modified operation sequence. In the reforming test, the product hydrogen purity is over 99.99 vol% after 3400 hour reforming at 550 deg C. This result shows that the durability against leakage improves dramatically for the advanced MOC module.
In addition, start-and-stop tests were carried out with the advanced MOC module. The product hydrogen purity was over 99.99% after twelve times starts and stops.
A gas-fired small-scale reformer with four MOC modules was tested and over 500 hours reforming operation with the reformer was demonstrated. Based on the test results, the burner, reactor and furnace of the reformer were improved to ensure stable operation.
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