CIESC Journal ›› 2022, Vol. 73 ›› Issue (12): 5414-5426.DOI: 10.11949/0438-1157.20221139

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Research on chemical looping reforming of CH4 by CeO2 doped CuFe2O4 oxygen carrier coupled with CO2 thermocatalytic reduction

Baowen WANG1(), Gang ZHANG1, Tongqing LIU1, Weiguang LI1, Mengjia WANG1, Deshun LIN1, Jingjing MA2   

  1. 1.School of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, Henan, China
    2.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
  • Received:2022-08-15 Revised:2022-11-07 Online:2023-01-17 Published:2022-12-05
  • Contact: Baowen WANG

CeO2/CuFe2O4氧载体CH4化学链重整耦合CO2热催化还原研究

王保文1(), 张港1, 刘同庆1, 李炜光1, 王梦家1, 林德顺1, 马晶晶2   

  1. 1.华北水利水电大学能源与动力工程学院,河南 郑州 450045
    2.宁夏大学省部共建煤炭高效利用与绿色化工 国家重点实验室,宁夏 银川 750021
  • 通讯作者: 王保文
  • 作者简介:王保文(1975—),男,博士,副教授,david-wn@163.com
  • 基金资助:
    国家自然科学基金项目(51776073);河南省科技攻关项目(162102210233);省部共建煤炭高效利用与绿色化工国家重点实验室项目(2021-KF 42)

Abstract:

The CH4 chemical chain reforming coupled with CO2 thermal catalytic reduction can not only flexibly adjust the H2/CO ratio of the prepared syngas, but also realize the high-value utilization of the two greenhouse gases, which has great application prospects. Mixed oxygen carriers of CuFe2O4 doped with CeO2 of different mass contents were prepared by using a sol-gel combustion synthesis (SGCS) method. In a self-made multifunctional fixed-bed reactor, the thermal catalytic reduction performance of modified oxygen carrier and CH4 for partial oxidation and reduced oxygen carrier for CO2 was systematically investigated. And through continuous redox experiments, it was found that the CuFe2O4 composite oxygen carrier enhanced by CeO2 doping has higher reactivity towards CH4 and CO2 than the single oxide component. Furthermore, CuFe2O4 doped with 30%(mass) CeO2 was found to have the highest CH4 conversion, and during the cyclic reaction processes, high conversions of both CH4 and CO2 were sustained, as thus demonstrating its desired reaction performance and cyclic stability.

Key words: methane, carbon dioxide, chemical looping reforming, thermocatalytic reduction, syngas, CeO2/CuFe2O4 oxygen carrier

摘要:

CH4化学链重整耦合CO2热催化还原,既能灵活调控所制备合成气的H2/CO比,又能实现两种温室气体的高值化利用,具有极大的应用前景。采用溶胶-凝胶燃烧合成法制备不同质量掺杂比的CeO2/CuFe2O4氧载体,在自制多功能固定床反应器中,系统考察了改性氧载体与CH4部分氧化以及还原氧载体对CO2的热催化还原性能,并通过连续氧化还原实验发现,与单一氧化物组分相比,CeO2掺杂强化的CuFe2O4复合氧载体对CH4和CO2具有更高的反应活性。其中30% CeO2掺杂量的混合氧载体具有最高的CH4转化率,且在多次氧化还原循环反应中保持较高且稳定的CO2转化率,表明其良好的反应性能和循环稳定性。

关键词: 甲烷, 二氧化碳, 化学链重整, 热催化还原, 合成气, CeO2/CuFe2O4氧载体

CLC Number: