Cai Chuanchuan, Ge Tao, Zhou Bingyi, Zhang Mingxu
State Key Laboratory Mining Response and Disaster Prevention and Control in Deep Coal Mines, Huainan 232001, China.
Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 32001, China.
ACS Omega. 2021 Nov 19;6(48):32791-32797. doi: 10.1021/acsomega.1c04669. eCollection 2021 Dec 7.
The desulfurization efficiency, combustion properties, combustion kinetics, and structural changes of Kentucky coal under microwave irradiation (MI) combined with hydrochloric acid solution pickling were investigated and compared using a thermogravimetric analyzer coupled to a Fourier transform infrared spectrometer. The results show that the desulfurization rate increases with the concentration of hydrochloric acid solution. The introduction of MI can effectively improve the desulfurization efficiency. After desulfurization, the ignition temperature and burnout temperature of coal samples increase, the combustion index decreases, and the combustion performance deteriorates. The maximum weight loss rate decreases with the increase of the concentration of hydrochloric acid solution, and the activation energy of the coal sample after microwave treatment increases, and the reaction difficulty increases. The infrared analysis results show that MI and hydrochloric acid pickling treatment have little effect on the functional group structure of coal samples.
采用热重分析仪与傅里叶变换红外光谱仪联用的方法，对微波辐照（MI）结合盐酸溶液酸洗处理下的肯塔基煤的脱硫效率、燃烧特性、燃烧动力学和结构变化进行了研究和比较。结果表明，脱硫率随盐酸溶液浓度的增加而提高。微波辐照的引入能有效提高脱硫效率。脱硫后，煤样的着火温度和 burnout 温度升高，燃烧指数降低，燃烧性能变差。最大失重率随盐酸溶液浓度的增加而降低，微波处理后煤样的活化能增加，反应难度增大。红外分析结果表明，微波辐照和盐酸酸洗处理对煤样的官能团结构影响较小。
