成果報告書詳細
管理番号20140000000138
タイトル*平成25年度中間年報 固体酸化物形燃料電池等実用化推進技術開発 次世代技術開発 マイクロSOFC型小型発電機
公開日2015/12/19
報告書年度2013 - 2013
委託先名岩谷産業株式会社 独立行政法人産業技術総合研究所 岩尾磁器工業株式会社
プロジェクト番号P13001
部署名新エネルギー部
和文要約
英文要約Title: Technology Development for SOFC Commercialization Promotion Development of Next Generation Technology Small Electricity Generator using micro SOFC (FY2013-FY2014) FY2013 Annual Report

In this project, both elemental and manufacturing technologies of high efficient portable SOFC system (DC 200W) using LP Cassette gas (n-Butane:i-Butane=70:30) are developed aiming for small generator market.
First, SOFC generation test of micro tubular cells has been carried out using wet n-Butane gas at 923K, and it was confirmed that the voltage drop was within 10% for initial 100 hours operation, which was within expectation.
Then, mass-production techniques of micro tubular cells developed by AIST were transferred to IWAO JIKI KOGYO Co. So far, IWAO JIKI KOGYO established
manufacturing process of 5000 micro tubular cells per day, by optimizing anode tube extrusion process and introducing automatic dip coater for electrolyte and cathode electrode layers. Power generation characteristics of the cells were confirmed to be equivalent to those fabricated by AIST.
Basic stack structure for portable SOFC system was established by considering materials for manifolds and reasonable accumulation method of the cells. It is expected to be durable for repeated start and stop operations by using a gas burner furnace.
AIST's study on direct n-butane power generation test also revealed that the deposition of carbon nano fiber on the electrode surface took place at lower temperature operation (873K Max.) and it caused the degradation of power generation. It leads to recognition that our system will need pre-reforming unit to reduce the amount of C2 or higher hydrocarbons by appropriate reforming reactions. In this regard, optimization of pre-reforming conditions such as space velocity and air-fuel ratio was conducted by using partial oxidation catalysis (Rh-Al2O3) for desulfurized cassette gas. It was confirmed by IWATANI CORP. that ideal reformed gas (0 % of C2 or higher hydrocarbons) was obtained without additional external heat.
In addition, rapid heating system has been developed and tested using developed cells, stacks and a furnace. Using a burner torch, 3 minute-heating up to 923K and keeping that temperature inside the furnace were confirmed. Towards developing prototype device for the next fiscal year, we have prepared a test furnace incorporating a small SOFC stack and optimized components such as heat-insulating material, a burner, and an air blower.
We are currently extracting problems for the downsizing of the SOFC system by conducting power generation tests using developed SOFC test unit.
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