高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (3): 506-513.doi: 10.7503/cjcu20170577

• 物理化学 • 上一篇    下一篇

ZrO2/TiO2载体协同作用下Fe2O3(104)与CO化学链燃烧特性

程伟良1(), 朱梦倩1, 覃吴2(), 侯翠翠2   

  1. 1. 华北电力大学能源动力与机械工程学院, 北京 102206
    2. 华北电力大学可再生能源学院, 生物质发电成套设备国家工程实验室, 北京 102206
  • 收稿日期:2017-08-24 出版日期:2018-03-10 发布日期:2018-01-23
  • 作者简介:联系人简介: 覃 吴, 男, 博士, 副教授, 主要从事清洁燃烧及新能源材料研究. E-mail:qinwu@ncepu.edu.cn; 程伟良, 男, 博士, 教授, 主要从事清洁燃烧及污染物排放研究. E-mail:cwl@ncepu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51476056)和中央高校基本科研专项基金(批准号: 2016YQ07)资助

Chemical Looping Combustion Characteristics of Fe2O3(104) and CO Under Synergistic Action of ZrO2/TiO2 Carrier

CHENG Weiliang1,*(), ZHU Mengqian1, QIN Wu2,*(), HOU Cuicui2   

  1. 1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
    2. National Engineering Laboratory for Biomass Power Generation Equipment, School of Renewable Energy,North China Electric Power University, Beijing 102206, China
  • Received:2017-08-24 Online:2018-03-10 Published:2018-01-23
  • Contact: CHENG Weiliang,QIN Wu E-mail:cwl@ncepu.edu.cn;qinwu@ncepu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51476056) and the Fundamental Research Funds for the Central Universities, China(No.2016YQ07)

摘要:

在表面形貌控制增强铁基载氧体Fe2O3(104)化学链燃烧反应活性研究的基础上, 进一步研究了TiO2, ZrO2载体协同作用下Fe2O3(104)与CO化学链燃烧的反应特性. 采用X射线衍射(XRD), 扫描电子显微镜(SEM)和比表面积(BET)等方法对所制备的载氧体Fe2O3(104)/TiO2和Fe2O3(104)/ZrO2进行表征. 研究了700, 800和900℃下载氧体与CO化学链燃烧反应特性. 结果表明, 不同载体对Fe2O3(104)与CO发生化学链燃烧反应活性的影响程度不同, ZrO2作为载体明显促进Fe2O3(104)与CO的反应速率. 动力学分析结果显示, Fe2O3(104)/TiO2与CO反应模型属于一级反应, 反应活化能为153.6 kJ/mol; Fe2O3(104)/ZrO2与CO反应模型属于抽缩球体模型, 反应活化能为118.9 kJ/mol.

关键词: 化学链燃烧, 载氧体, Fe2O3(104), 化学反应动力学

Abstract:

This work focused on the synergetic effect of the supports TiO2 and ZrO2 on the chemical looping combustion(CLC) between Fe2O3(104) and CO. Fe2O3(104)/TiO2 and Fe2O3(104)/ZrO2 were prepared, and characterized by means of XRD, SEM and BET. Then, the CLC reactions between the prepared oxygen carrier and CO were studied under 700, 800 and 900 ℃ in a small CLC reaction system, the results suggest that the supports affect the reactivity of Fe2O3(104), and ZrO2 is more efficient than TiO2. Furthermore, dynamic analysis shows that the reaction between Fe2O3(104)/TiO2 and CO could be assigned to the first order reaction model with the apparent activation energy(E) being 153.6 kJ/mol, while the reaction between Fe2O3(104)/ZrO2 and CO belongs to the Shrink sphere reaction model with E being 118.9 kJ/mol. This work provides more reasonable dynamic model for the designing of CLC reactor.

Key words: Chemical looping combustion, Oxygen carrier, Fe2O3(104), Chemical reaction kinetics

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