평판형 수소생산시스템 개발에 관한 연구

Abstract

As a method of power generation, fuel cells have the potential to provide higher efficiency with less emission compared to internal combustion engines. The efficiency improvement of reformer which is the important part of fuel cell system will be required. The proton exchange membrane fuel cell (PEMFC) is highly sensitive to carbon monoxide. CO has detrimental effects on the performance of the fuel cell. Thus, reformed gas supplied to Fuel cell system, which maintained CO concentration below 10ppm. This study has been experimentally performed to evaluated the performance of 1kw class plate type hydrogen generation system, which is composed of Burner, STR, HTS, LTS, PrOx1‧2. STR produces most of H2 with chemical reaction of CH4 and water vapor. HTS, LTS, and PrOx1‧2 reduce CO concentration below 10ppm. In the experiment, we changed A/F ratio(α=1.1, 1.3, 1.5)and supply heat(1.193, 1.790, 2.388kW) in burner in order to optimize the drive condition. In reforming experiment, reformed gas contained CO that is harmful to the catalyst used in PEMFC. For this reason, CO must be removed. After applying optimum drive condition, reformed gas was measured with gas chromatography and could find out about each experimental condition of H2‧CO concentration. As a results, The 1kw class Plate type hydrogen generation system's optimum condition is A/F ratio α=1.3, STR Temperature 1023K, S/C ratio 3, and PrOx1‧2 30cc/min. It turns out that installation of PrOx 2 stage is more efficient for reducing CO concentration.