文献类型：期刊文献

英文题名：Study on the Non-Thermal Microwave Effect of Organic Sulfur Removal from Coal by Microwave with Peroxyacetic Acid

作者：Tang, Longfei[1,2]; Guo, Jifen[2]; Tao, Xiuxiang[2]; Chen, Xueli[1]

机构：[1] Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Chemical Engineering & Technology, China University of Mining & Technology, Jiangsu, Xuzhou, 221116, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220136292)

语种：英文

外文关键词：Activation analysis - Activation energy - Desulfurization - Electric fields - Isotherms - Microwaves - Quantum chemistry - Sulfur

摘要：The non-thermal microwave effect of coal desulfurization was explored using the non-isothermal kinetic analysis and the quantum chemical calculation. Results of the non-isothermal kinetic analysis showed that the activation energy of coal desulfurization decreased from 70.86 kJ/mol to 53.10 kJ/mol when the microwave power increased from 100 W to 400 W. For the theoretical calculation, it is found that the electron density distribution around organic sulfur atoms increased under the positive extra electric field. This suggested that the nucleophilic reaction activity of sulfur-containing groups could be improved due to the non-thermal microwave effect. During the oxidation of thioether and sulfoxide groups, it is found that the strength of C-S bands could be reduced under the extra electric fields. However, the reaction activation energy was reduced and reaction rate was increased under the same extra electric fields, which resulted in the formation of stable sulfone groups in coal. Therefore, there was a competitive relationship between sulfur-containing bonds fracture and groups oxidation under the action of microwave non-thermal effect, which provided a reference for coal desulfurization research. ? 2022, The Authors. All rights reserved.