1. Mechanism of sulfur removal from coal by microwave assisted acetic acid-hydrogen peroxide system.
- Author
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Cheng, Sidan, Li, Mei, Xu, Shiyong, Ding, Ning, Yue, Jinsong, and Li, Hui
- Subjects
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DESULFURIZATION of coal , *DESULFURIZATION , *SULFUR compounds , *HYDROGEN peroxide , *ACTIVATION energy , *MICROWAVES , *PEROXIDES , *ELECTRIC fields - Abstract
The desulfurization effect of Ningxia Shuangma coal (SM) with an acetic acid-hydrogen peroxide system assisted by microwave, ultrasonic and ultraviolet light was compared. The results show that microwave-assisted desulfurization has the best effect. When the microwave power is 900W, the irradiation time is 5 min, and the volume ratio of acetic acid to hydrogen peroxide is 1:10, the desulfurization rate can reach 55.82%. Moreover, microwave-assisted desulfurization can effectively improve the removal effect of organic sulfur. XRD, XPS, SEM and other characterization showed that microwave assisted can effectively reduce the mineral content, expose more sulfur-containing groups, and improve the desulfurization effect. The desulfurization rate of three sulfur-containing compounds is: dibenzyl sulfide > diphenyl sulfoxide > benzothiophene. With the increase of intensity of the applied electric field, the C–S bond gets easier to fracture, the applied electric field can reduce the reaction energy barrier, is a benefit to the reaction. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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