| 초록 |
MCEC (Molten Carbonate Electrolysis Cell) can provide the option for generating the high purity hydrogen via the electrolysis of H2O and CO2 at cathode since the carbonate ion formed by electrolysis of CO2 and CO can transfer to anode. Here, due to the high temperature operation of 650℃, we can use the steam reforming of CH4 for the CO2 supply in MCEC. For catalyzing CH4+H2O reforming reaction, nickel has been used in cathode channel of MCEC. However, electrolytes (such as Li2CO3, and K2CO3) can be vaporized and then poison Ni catalyst, which leads to the gradual loss of CH4 steam reforming activity. In this presentation, we attempt to understand the poisoning mechanism of Ni catalyst for the steam reforming of CH4 at electrolyte condition by using density function theory (DFT) calculation. In addition, we examine the effect of Ru dopant on the electrolyte poisoning tolerance of Ni catalyst. |
