Mechanism of coal electrochemistry desulfurization under alkaline conditions

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Hongbo, Zhang^1 ; Rui, Sun^1 ; Shuang, Zhang^1

Institute of Mining Engineering, Heilongjiang University of Science and Technology, Harbin

150022, China^1

关键词: Alkaline conditions;    Anode oxidation;    Desulfurization of coals;    Electrochemical reactions;    Granular distribution;    High-sulfur coals;    Ion chromatographs;    Sulfate radicals;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032002/pdf
DOI  :  10.1088/1755-1315/189/3/032002

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

To study the desulfurization mechanism of coal-derived pyrite and organic sulfur in coal, the experiment used the solution of NaOH whose concentration is 2.0mol/L as electrolyte to dispose high sulfur coal samples whose content is 3.08% with the H type undivided electrolytic cell, and analyzed the before and after desulfurization of coal samples by scanning electron microscope, XRF and IR spectrum and the filtrate is from after electrolyzing coal sample by ion chromatograph. The results showed that the inorganic sulfur of coal sample mainly in the form of Pyrite that is a fine granular distribution in the coal and disseminates on the coal particle, then pyrite is removed by generating sulfate at the anode oxidation reaction, and finally, organic sulfur in coal samples mainly is removed by electrochemical reaction that can convert into the form of sulfate radicals.