Characteristic Study of Shenmu Bituminous Coal Combustion with Online TG-MS-FTIR

2017 International Conference on Advanced Environmental Engineering

生态环境科学

Pan, Guanfu^1,2,3

China Coal Research Institute Company of Energy Conservation Corporation Ltd., 5 Qingniangou east road, Hepingli Subdistrict, Beijing, China^1

State Key Laboratory of Coal Mining and Clean Utilization, 5 Qingniangou east road, Hepingli Subdistrict, Beijing, China^2

National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control, 5 Qingniangou east road, Hepingli Subdistrict, Beijing, China^3

关键词: Adsorbabilities;    Coal particles;    Combustion characteristics;    Combustion kinetics;    Combustion products;    Contact areas;    Pulverized coals;    Residence time;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/111/1/012018/pdf
DOI  :  10.1088/1755-1315/111/1/012018

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The combustion characteristics of Shenmu bituminous pulverized coal (SBC) were comprehensively investigated with a combined TG-MS-FTIR system by considering the effect of particle size, heating rate and total flowrate. The combustion products were accurately quantified by normalization and numerical analysis of MS results. The results indicate that the decrease of the particle size, heating rate and total flowrate result in lower ignition and burnout temperatures. The activation energy tends to be lower with smaller particle size, lower heating rate and total flowrate. The MS and FTIR results demonstrate that lower concentrations of different products, such as NO, NO2, HCN, CH4and SO2were produced with smaller particle size, slower heating rate and lower total flowrate. The decrease of particle size would lead to more contact area with oxygen and slower heating rate could provide more sufficient time for the diffusion. High total flowrate would reduce the oxygen adsorbability on the coal particle surface and shorten the residence time of oxygen, which makes the ignition difficult to occur. This work will guide to understand the combustion kinetics of pulverized coals and be beneficial to control the formation of pollutants.