固体碳的CO_2气化反应(C+CO_2=2CO),即逆Boudouard反应,是制约固体氧化物直接碳燃料电池(solid oxide direct carbon fuel cell,SO-DCFC)性能的关键反应之一。文章在比较煤焦和担载酸活化钢渣的煤焦的逆Boudouard反应性的基础上,研究比较了以二者为燃料的SO-DCFC的电化学性能。结果表明,酸活化钢渣催化剂使煤焦的逆Boudouard反应的起始温度降低了240℃,在800℃时的CO生成速率提高了4倍;在电化学性能上,酸活化钢渣催化剂使电池在850℃时的峰值功率密度从67.4mW·cm~(-2)提升到200.4mW·cm~(-2),燃料利用率从41.5%提高至79.6%。 The CO_2 gasification reaction of solid carbon (C + CO_2 = 2CO), that is, the inverse Boudouard reaction, is one of the key reactions that constrain the performance of solid oxide direct carbon fuel cells (SO-DCFC). Based on the comparison of the inverse Boudouard reactivity of char with acid-activated slag, the electrochemical behavior of SO-DCFC with both fuels was compared and studied. The results show that the acid activated slag catalyst reduces the onset temperature of the reverse Boudouard reaction of coal char by 240 ℃ and the CO formation rate increases by 4 times at 800 ℃. On the electrochemical performance, the acid activated slag catalyst makes the battery at 850 ℃ ℃, the peak power density increased from 67.4mW · cm -2 to 200.4mW · cm -2, and the fuel utilization rate increased from 41.5% to 79.6%.