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Combustion Characteristic of Anode Off Gas for Fuel Cell Reformer  

Lee, Pil Hyong (인천대학교 기계공학과 대학원)
Hwang, Sang Soon (인천대학교 기계시스템공학부)
Publication Information
Journal of the Korean Society of Combustion / v.17, no.4, 2012 , pp. 5-10 More about this Journal
Abstract
The reformer system is a chemical device that drives the conversion of hydrocarbon to hydrogen rich gas under high temperature environment($600-1,000^{\circ}C$). Generally, NG(Natural Gas) or AOG(Anode Off Gas) is used as fuel of fuel cell reformer combustion system. The experimental study to analyze the combustion characteristics of a premixed ceramic burner used for 0.5-1.0 kW fuel cell reformer was performed. Ceramic burner experiments using NG and AOG were carried out to investigate the flame stability characteristics by heating capacity, equivalence ratio and different fuels respectively. The results show that surface flames can be classified into green, red, blue and lift-off flames as the equivalence ratio of methane-air mixture decreases. And the stable flames can be established using NG and AOG as reformer fuel in the perforated ceramic burner. In particular, the blue flame is found to be stable at a lean equivalence ratio under different mixture conditions of NG and AOG for the 0.5 to 1.0 kW fuel cell system power range. NOx emission is under 60 ppm between 0.70 to 0.78 of equivalence ratio and CO emission is under 50 ppm between 0.70 to 0.84 of equivalence ratio.
Keywords
Reformer; AOG(Anode Off Gas); Perforated ceramic burner; Flame stability; CO; NOx;
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