摘要
直接以甲烷(CH4)为燃料的固体氧化物燃料电池(Solid Oxide Fuel Cell,SOFC)具有操作系统简单、发电效率高、环境友好等优点,但传统镍基阳极使用CH4时极易产生积炭,导致电池性能下降甚至破裂。因此,如何有效抑制积炭的产生是目前镍基阳极面临的重要挑战。本文针对传统Ni-Y_(0.08)Zr_(0.92)O_(2−δ)(Ni-YSZ)阳极使用CH4时存在严重的积炭行为,采用质子导体BaZr_(0.1)Ce_(0.7)Y_(0.1)Yb_(0.1)O_(3−δ)(BZCYYb)代替氧离子导体YSZ,考查了Ni-BZCYYb对CH4水蒸气重整反应的催化活性和抗积炭性能,同时与Ni-YSZ进行比较。以Ni-BZCYYb为阳极的SOFC,在700–600℃、湿CH4(97%CH4-3%H2O)为燃料时取得了较好的电化学性能,同时,该电池在600℃、恒电流密度下稳定运行100 h电压没有明显降低。但以Ni-YSZ为阳极的SOFC在相同条件运行不到6 h电压降为零。通过对比表明,BZCYYb提高了阳极的抗积炭能力,Ni-BZCYYb可以应用于以CH4为燃料的SOFC中,是优异的抗积炭阳极材料。
Solid oxide fuel cell(SOFC)is a promising power-generation device.Direct operation of SOFC on methane has several important advantages,such as simple system,high efficiency and low emissions.The challenge of the state-of-the-art nickel cermet anode is prone to coke formation when operating on methane,which may cause rapidly deteriorate of the performance and durability on SOFC.In this work,the anode Ni-BaZr_(0.1)Ce_(0.7)Y_(0.1)Yb_(0.1)O_(3−δ)(BZCYYb)was investigated for wet methane(97%CH4-3%H2O)conversion in the temperature range of 700 to 600℃.The Ni-BZCYYb anode showed a good electrochemical performance for the steam reforming of methane.Furthermore,under a constant current density,a good operational stability was achieved at 600℃for 100 h operating.For comparison,a conventional Ni-YSZ anode was also prepared,the voltage of cell dropped to zero after feeding wet CH4 for~6 h.These results indicate that the Ni-BCZYYb is a good candidate as the anode in SOFC on methane fuel.
作者
吕秀清
孙海珍
安静
张保柱
何婧
陈绘丽
LÜXiu-qing;SUN Hai-zhen;AN Jing;ZHANG Bao-zhu;HE Jing;CHEN Hui-li(Department of Chemistry and Chemical Engineering,Jinzhong University,Jinzhong 030619,China;Analytical Instrumentation Center,State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;Institute of Molecular Science,Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province,Shanxi University,Taiyuan 030006,China)
出处
《燃料化学学报（中英文）》
EI
CAS
CSCD
北大核心
2023年第4期519-527,共9页
Journal of Fuel Chemistry and Technology
基金
晋中学院博士科研启动经费
山西省高等学校教学改革创新项目(J2021638)资助。
