Mathematical model of the reduction process of iron-based oxygen carriers in chemical looping combustion

被引：0
|
作者：
Li Q.-Y. [1 ]
Dai Y. [1 ]
Zhang S.-Z. [1 ]
Wen Z. [1 ,2 ]
Liu X.-L. [1 ,2 ]
机构：
[1] School of Mechanical Engineering, University of Science and Technology Beijing, Beijing
[2] Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, Beijing
来源：
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | 2016年 / 38卷 / 12期
关键词：
Chemical looping combustion; Iron-based oxygen carriers; Mathematical models; Reduction;
D O I：
10.13374/j.issn2095-9389.2016.12.016
中图分类号：
学科分类号：
摘要：
To study the reaction characteristics of iron-based oxygen carriers, a one-dimensional mathematical model was developed for the reduction process of iron-based oxygen carriers in moving beds based on the unreacted shrinking core model. In this model, the multi-stage reduction between iron-based oxygen carriers and H2/CO was considered. The average error of gas species concentration between the simulative and experimental values is 6.92%, and the average error of reduction is 11.16%. The results show that the final reduction rate of iron-based oxygen carriers is about 23%, with the main reactions including the first-stage reduction and the second-stage one, whose reduction rate is 95% and 40%, respectively. A higher reaction temperature, suitable diameter of oxygen carrier particles and suitable gas-solid ratio are helpful to improve the depth of reaction and enhance the utilization efficiency of syngas and iron-based oxygen carriers. The recommended particle diameter is 1 to 2 mm. © All right reserved.
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页码：1770 / 1777
页数：7
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