石油学报(石油加工) ›› 2020, Vol. 36 ›› Issue (6): 1200-1205.doi: 10.3969/j.issn.1001-8719.2020.06.010

• 化学链燃烧 • 上一篇    下一篇

一种铜铁铝复合载氧体化学链燃烧性能

崔东旭, 曾德望, 肖睿   

  1. 东南大学 能源与环境学院,江苏 南京 210096
  • 收稿日期:2020-06-28 修回日期:2020-08-21 出版日期:2020-11-25 发布日期:2020-12-02
  • 通讯作者: 肖睿,男,教授,博士,从事化学链方向研究,E-mail: ruixiao@seu.edu.cn E-mail:dwzeng@seu.edu.cn
  • 作者简介:第一作者:崔东旭,男,博士研究生,从事化学链燃烧和气化方向研究
  • 基金资助:
    国家自然科学基金项目(51906041)资助

Performance of a Cu-Fe-Al-O Oxygen Carrier in Chemical Looping Combustion

 CUI Dongxu, ZENG Dewang, XIAO Rui   

  1.  School of Energy and Environment, Southeast University, Nanjing 210096, China
  • Received:2020-06-28 Revised:2020-08-21 Online:2020-11-25 Published:2020-12-02
  • Supported by:
     

摘要:

利用溶胶-凝胶法制备了一种Cu-Fe-Al-O复合载氧体,以CO为还原介质,在固定床反应器上探究了该载氧体的化学链燃烧性能,以及4种还原程度下该载氧体的循环反应稳定性。结果显示:在20次化学链循环反应中,Cu-Fe-Al-O 复合载氧体对应的化学链反应中CO2产率较为稳定,约为4 mmol/g;而对比样品氧化铁在第20次化学链循环时,对应的化学链反应中CO2产率仅有0.95 mmol/g。进一步实验发现,当还原程度小于75%时,使用Cu-Fe-Al-O载氧体的化学链反应运行稳定,因为在氧化还原过程中,活性组分铜、铁与尖晶石载体存在溶出现象,限制了活性组分的聚集,因此,Cu-Fe-Al-O复合载氧体具有较高的化学链反应循环稳定性。

关键词: 化学链燃烧, 载氧体, 循环稳定性, 还原程度

Abstract:

A sol-gel method was used to prepare a Cu-Fe-Al-O oxygen carrier, and CO as the reducing agent, was employed to investigate the chemical looping combustion performance and cyclic stability at four reduction degrees of the oxygen carrier in a fixed bed reactor. The results show that the CO2 yield of synthesized material is stable, which is about 4 mmol/g in 20 cycles. As contrasted, the CO2 yield of Fe2O3 as oxygen carrier is only 0.95 mmol/g at the 20th cycle. Further experiments show that the Cu-Fe-Al-O oxygen carrier can be stably operated at a reduction depth of less than 75%, because the active components copper and iron reversible exsolve and dissolve from and into the spinel support during the redox cycle, which hinders the sintering of active components.

Key words: chemical looping combustion, oxygen carrier, redox stability, reduction degree

中图分类号: