载氧体几何结构对固定床化学链燃烧影响的实验研究  

Experimental study on the effects of geometrical structure of oxygen carriers on chemical looping combustion in a fixed bed reactor

作　　者：蒋健俣 郭雪岩[1] 霍官平 王志远 杨帆[1] JIANG Jianyu;GUO Xueyan;HUO Guanping;WANG Zhiyuan;YANG Fan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《能源研究与信息》2022年第1期38-45,共8页Energy Research and Information

摘　　要：使用浸渍法制备了球形与拉西环两种内扩散性能不同的铜基载氧体颗粒,在小型固定床反应器上进行了甲烷化学链燃烧实验,分析了球形与拉西环载氧体颗粒在还原反应与氧化反应中的最大温升及所需时间。结果表明:在还原反应中,甲烷进气流量能同时对拉西环载氧体的反应速率与最大温升产生影响,在总流量较大时有必要控制甲烷与氮气进气流量比;在氧化反应中,拉西环载氧体最大温升高于球形载氧体,反应温度的增大对拉西环载氧体最大温升的提升效果优于球形载氧体。Two kinds of copper-based oxygen carriers(OCs)with different geometrical structure(sphere and Raschig ring)were prepared with impregnation method and were used for chemical looping combustion(CLC)of methane in a lab-scale fixed bed reactor.The maximum temperature rise and the associated time of the OCs supporting on Raschig ring and spherical particles in the reduction and oxidation reactions were compared.The results showed that the flow rate of methane could affect the reaction rate and the maximum temperature rise of Raschig ring in the reduction reaction.It was necessary to control the flow ratio of methane to nitrogen when the large flow rate was adopted.In the oxidation reaction,the maximum temperature rise of Raschig ring was higher than that of spherical structure,and the effect of reaction temperature on the maximum temperature rise for Raschig ring was better than that of spherical particles.

关 键 词：化学链燃烧 固定床 拉西环 内扩散 甲烷 

分 类 号：TQ052.6[化学工程]