松木屑及其热解产物在熔融锡阳极固体氧化物燃料电池中的电化学特性  

Electrochemical characteristics of sawdust and its pyrolytic products in solid oxide fuel cell with molten Sn anode

作　　者：王天成 徐凯[2] 董继州 邹潺 胡红云[2,3] 高林霞 李曦[3] 姚洪[2] WANG Tiancheng;XU Kai;DONG Jizhou;ZOU Chan;HU Hongyun;GAO Linxia;LI Xi;YAO Hong(School of Civil&Environment Engineering,Hubei University of Technology,Wuhan 430068,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,湖北武汉430068 [2]华中科技大学能源与动力工程学院煤燃烧国家重点实验室,湖北武汉430074 [3]深圳华中科技大学研究院,广东深圳518057

出　　处：《热力发电》2022年第5期113-120,共8页Thermal Power Generation

基　　金：国家自然科学基金项目(51906081);深圳市科技计划项目(JCYJ20210324115606017)。

摘　　要：为了探究固体氧化物燃料电池(SOFC)阳极熔融锡对生物质热解特性及电化学参数的影响,选择松木屑为研究对象,测试了松木屑及其热解气液产物在熔融锡阳极固体氧化物燃料电池(Sn-SOFC)中的电化学性能。结果表明:熔融锡使得松木屑热解气中H_(2)的体积分数提升约130.1%,而含碳气体(CO、CO_(2)、CH_(4))体积分数下降了40.4%;相比于传统Ni/YSZ阳极,松木屑及其热解焦在锡阳极阻抗提高可达45%,导致在锡阳极初始电流密度降低到0.243 A/cm^(2);对于松木屑气液产物,由于其在熔融锡中溶解度较低,导致SnO_(2)在阳极积累,放电电流密度衰减速度可达1.922×10^(-5)A/(cm^(2)·s),经扫描电子显微镜(SEM)及能量色散X射线谱(EDS)检测发现,积碳悬浮于熔融锡上层,因此避免了对阳极层的破坏。In order to explore the effect of molten Sn anode of solid oxide fuel cell (SOFC) on pyrolysis characteristics and electrochemical parameters of biomass,by taking pine sawdust as the research object,the electrochemical performance of the pine sawdust and its pyrolysis products (gases and liquids) on the molten Sn anode were detected.The results show that,the molten Sn increased the release of H_(2)by 130.1%and decreased the yield of carbonaceous gases (CO,CO_(2)and CH_(4)) by 40.4%during sawdust pyrolysis.Compared with the conventional Ni/YSZ anode,the impedance of Sn anode for pine sawdust and its char increased by 45%,resulting in that the initial current density only reduced to 0.243 A/cm^(2).For the gas and liquid products of pine sawdust,SnO_(2)accumulated at the anode due to its low solubility in the molten Sn,and the decay rate of discharge current was 1.922×10^(-5)A/(cm^(2)·s).Through the scanning electron microscope (SEM) and X-ray energy dispersive spectrometer(EDS) analysis,it found that the accumulated carbon suspended on the upper layer of the molten Sn,so Sn can avoid the damage of carbon deposition to the anode layer.

关 键 词：松木屑 锡阳极 热解焦 燃料电池 电化学特性 

分 类 号：X712[环境科学与工程—环境工程]