Effects of Syngas Components on the Carbon Formation in Planar Solid Oxide Fuel Cell

The utilization of syngas as the fuel of solid oxide fuel cell(SOFC) is one of the main ways to use the coal efficiently and cleanly.However,the possibility of carbon formation in Ni/YSZ anode may reduce the per-formance of SOFC.According to the fully three-dimensional models of chemical/electrochemical,heat/mass trans-fer and overpotential,the effects of fuel components on the performance and carbon formation of SOFC were ob-tained.The results shows that the increments of water steam and carbon dioxide may inhibit the carbon formation activity.However,the massive water steam and carbon dioxide will reduce the output voltage of SOFC as well.The high molar fraction of hydrogen in syngas also reduces the carbon formation activity.The addition of carbon mon-oxide may narrow down the region of carbon formation,but enhance the carbon formation activity near the fuel inlet of SOFC.Moreover,the existence of methane results in the sharply carbon formation,thus,the methane should be removed as clear as possibly in syngas.