Experiments and characteristic evaluation of decomposition process of cement raw meals in high CO2 atmosphere

被引：0

作者：

Xu Y. ^{[1
]}

Zhong W. ^{[1
]}

Zhou G. ^{[1
]}

Chen X. ^{[1
]}

Zhao X. ^{[2
]}

Xin M. ^{[2
]}

Chen Y. ^{[2
]}

Zhu Y. ^{[2
]}

机构：

[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing

[2] Sinoma International (Nanjing) Engineering Co., Ltd., Nanjing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 03期

关键词：

Cement raw meals; CO[!sub]2[!/sub] emission; Decomposition characteristics; Evaluation system;

D O I：

10.3969/j.issn.1001-0505.2022.03.003

中图分类号：

学科分类号：

摘要：

To obtain the decomposition characteristics of cement raw meal in high CO2 atmosphere and give the best operation suggestion, an experimental evaluation system for the decomposition of cement raw meal in high CO2 atmosphere was developed. Effects of the reaction atmosphere, the reaction temperature, and the mass fraction of cement raw meals on decomposition characteristics were systematically studied, and characteristics were evaluated by a nonlinear fitting method. Based on the experimental data, the decomposition characteristics of cement raw meals were evaluated. The results show that the emission peak of CO2, the total amount of CO2 and the total decomposition time all increase with oxygen volume fraction. This is more obvious when the atmosphere changes from 21%O2/79%CO2 to 25%O2/75%CO2. Besides, the higher decomposition temperature and the higher proportion of coal prolong the time of cement raw meal decomposition process, thus improving high generation rate, total amount of CO2, and increasing the CaO mass fraction of the decomposition products to over 71%. The decomposition characteristics of cement raw meals at 30%O2/70%CO2 are the best and favorable for CO2 capture during the experiment. The best evaluation index of decomposition characteristics of cement raw meals are achieved at a temperature of 1 005 ℃. When the mass fraction of cement raw meals is 94%, both the coal consumption and the decomposition characteristics are in optimum equilibrium. © 2022, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：433 / 445

页数：12

共 37 条

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