Syngas production via coal char-CO_2 fluidized bed gasification and the effect on the performance of LSCFN//LSGM//LSCFN solid oxide fuel cell

作     者：Hai-Bin Li Na Xu Yi-Hua Fang Hui Fan Ze Lei Min-Fang Han 

作者机构：School of Chemical and Environmental Engineering China University of Mining & Technology State Key Laboratory of Power Systems Department of Thermal Engineering Tsinghua University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2018年第34卷第2期

页      面：403-408页

核心收录：

学科分类：0808[工学-电气工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Basic Research Program of China (Grant Nos. 2012CB215404, 2012CB215406) State Key Laboratory of Power Systems in Tsinghua University (No. SKLD15Z02, Fuel Cell Distributed Power Generation System) One-hundred Leading Talents Development Project for Progress on Science and Technology of Beijing (No. 041504130) 

主　　题：Fluidized bed gasification Syngas Solid oxide fuel cell (SOFC) La0.4Sr0.6Co0.2Fe0.7Nb0.01O3 δ (LSCFN] 

摘      要：Fluidized bed reactor is widely used in coal char-CO2 gasification. In this work, the production of syngas by using a fluidized bed gasification technique was first investigated and then the effect of the produced syngas on the performance of the solid oxide fuel cell with a configuration of La0.4Sr0.6Co0.2 Fe0.7 Nb0.1O3-δ//La0.8Sr0.2Ga0.83Mg0.17O3-δ//La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ（LSCFN//LSGM//LSCFN） was studied. During the syngas production, we found that the volume fraction of CO increased with the increment of gasification temperature, and it reached a maximum value of 88.8%, corresponding to a composition of 0.76% H2, 88.8% CO, and 10.44% CO2, when the ratio of oxygen mass flow rate to that of coal char （Mo2/Mchar） increased to 0.29. In the following utilization of the produced syngas in solid oxide fuel cells, it was found that the increasing CO volume fraction in the syngas results in a gradual increase of the peak power density of the LSCFN//LSGM//LSCFN cell. The maximum peak power density of 410 mW/cm^2 was achieved for the syngas produced at 0.29 of Mo2/Mchar. In the stability test, the cell voltage decreased by 4% at a constant current density of 0.475 A/cm^2 after 54 h when fueled with the syngas with the composition of 0.76% H2, 88.8% CO, and 10.44% CO2. It reveals that a carbon deposition with the content of 13.66% in the anode is attributed to the cell performance degradation.