地下煤气化合成气平管型固体氧化物燃料电池直接内重整发电特性  

Power Generation via Flat-Tube Solid Oxide Fuel Cells by Direct Internal Reforming of Syngas from Underground Coal Gasification

作　　者：桑君康 王继平 杨钧 朱良柱 官万兵 SANG Junkang;WANG Jiping;YANG Jun;ZHU Liangzhu;GUAN Wanbing(Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315200,Zhejiang,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江省先进燃料电池与电解池技术重点实验室,浙江宁波315200

出　　处：《硅酸盐学报》2024年第6期1791-1798,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(U20A20251,22209191);宁波市重点研发计划项目(2022Z027,2023Z145)。

摘　　要：以地下煤气化合成气为燃料,研究了平管型固体氧化物燃料电池的直接内重整发电特性。结果显示以地下煤气化合成气(加拿大的Swan Hills煤矿区)模拟组分为燃气时,在750℃下电池的最大功率密度为361.9 mW·cm^(-2),达到了相同状态下氢气燃料对应性能的91.6%。在该燃料气氛下,以300 mA·cm^(-2)连续稳定运行960 h,电池的欧姆阻抗、极化阻抗分别由0.108、0.4852Ω·cm^(2)增大至0.190、0.494Ω·cm^(2),对应增长率分别为0.085、0.009Ω·cm^(2)·kh^(-1)。Raman光谱及微观结构分析结果显示,电池性能的衰减主要是由燃料孔道表面的积碳、活性阳极层的镍颗粒团聚及镍含量损耗所致,通过增加合成气中CO_(2)的含量可一定程度上抑制积碳,提高电池运行稳定性。Introduction Underground coal gasification(UCG)technology is critical to coal development in China,which has attracted recent attention.UCG technology can directly convert coal into syngas rich in CH_(4),H_(2),CO_(2),and CO beneath the earth surface,which is appropriate for the employment of coal resources with a low value(i.e.,coal resources in large depths or with restricted thickness).UCG technology significantly reduces the economic cost and safety risks of coal mining and improves the overall efficiency of coal utilization.Syngas obtained from UCG technology is used to produce higher-value-added chemicals,such as methanol,ammonia,ethylene,and Fischer-Tropsch synthesis products,and the fuel for heating and power generation.Using syngas produced by UCG technology for power generation is mainly carried out through internal combustion engines.The energy conversion efficiency is limited by the Carnot cycle,usually about 30%,which diverges from the goal of clean and efficient use.Solid oxide fuel cells(SOFCs)convert the chemical energy in syngas fuel directly into electrical energy through electrochemical reactions.The conversion efficiency is considerably high and is not limited by the Carnot cycle.Power generation efficiency of>60%and combined heat and power(CHP)efficiency of>90%can be achieved.Therefore,SOFCs can efficiently employ the syngas from UCG,which is important for the clean and efficient development and utilization of coal.Flat-tube SOFCs exhibit high thermal shock resistance and stability under the redox cycle and are capable of being used in harsh environments.This paper was to investigate power generation using flat-tube SOFCs fed with carbon-containing fuels.In addition,the performance and durability of anode-supported flat-tube SOFCs with direct internal reforming of syngas from UCG were also analyzed.Methods The flat-tube Ni/yttria-stabilized zirconia(YSZ)anode-supported cell contains a porous NiO–3YSZ(3%yttria-stabilized zirconia,in mole fraction,~1 mm thick)anode support,a NiO–8YSZ(8%yttri

关 键 词：地下煤气化 合成气 稳定性 固体氧化物燃料电池 

分 类 号：TM911[电气工程—电力电子与电力传动]