低碳化学与化工2024，Vol.49Issue(6)：95-104,10.DOI:10.12434/j.issn.2097-2547.20230379
开路状态下固体氧化物电解槽制备合成气的模型设计与验证
Design and verification of model for syngas production in solid oxide electrolytic cell in open circuit state
摘要
Abstract
Solid oxide electrolysis cell(SOEC)can convert H2O and CO2 into syngas(H2 and CO)through co-electrolysis,thereby achieving the capture and utilization of CO2.However,in addition to electrochemical reactions,the reverse water gas shift(RWGS reaction)of the reaction gas at high temperatures also has a certain impact on the process.In order to investigate the role of RWGS reaction in synthesis gas preparation,a two-dimensional model of button-type SOEC for syngas preparation in open circuit state was established.The effects of inlet gas composition and operating temperature on RWGS reaction in the support layer of SOEC in open circuit state were studied.The simulation results of the model were compared and verified with experimental data to ensure the reliability of the model.The results indicate that the content(mole fraction,the same below)of reducing gas H2 in the inlet gas is the primary factor affecting the RWGS reaction rate.The higher the H2 content,the faster the RWGS reaction rate.When the H2 content is 30%,the CO2 conversion rate is above 29%.When the H2 content is 10%,the CO2 conversion rate is only 9%to 10%.In addition,when the H2 content is constant,the reaction rate of RWGS is mainly positively correlated with the CO2 content.Increasing the CO2 or H2 content in the inlet gas can improve the CO2 conversion rate in the open circuit state to varying degrees.A higher operating temperature is conducive to faster RWGS reaction,and under a constant H2 content,the higher the CO2 content in the inlet gas,the greater the rate of change in RWGS reaction rate.关键词
固体氧化物电解槽/共电解模型/逆水汽反应/合成气Key words
solid oxide electrolytic cell/co-electrolysis model/reverse water gas shift reaction/syngas分类
能源科技引用本文复制引用
高颖,张涛,李青山,孙元娜,李植,王涛,王俊勃,刘江南..开路状态下固体氧化物电解槽制备合成气的模型设计与验证[J].低碳化学与化工,2024,49(6):95-104,10.基金项目
国家自然科学基金(22109124) （22109124）
陕西省重点研发计划(2024SF-YBXM-431,2024GX-YBXM-463) （2024SF-YBXM-431,2024GX-YBXM-463）
陕西省青年人才托举计划(20210421) （20210421）
西安市纺织复合材料重点实验室科技指导性项目(xafzfc-zd05) （xafzfc-zd05）
陕西省技术创新引导计划(2024QCY-KXJ-021) （2024QCY-KXJ-021）
陕西省科技厅三项改革项目(2024ZC-YYDP-17) （2024ZC-YYDP-17）
全国大学生创新创业训练计划(S202310709111,S202310709023). （S202310709111,S202310709023）
