A novel method for removing organic sulfur from high-sulfur coal: Migration of organic sulfur during microwave treatment with NaOH-H2O2

被引：85

作者：

Cai, Shuangshuang ^{[1
,2
]}

Zhang, Shengfu ^{[1
,2
]}

Wei, Yuyang ^{[1
,2
]}

Sher, Farooq ^{[3
]}

Wen, Liangying ^{[1
,2
]}

Xu, Jian ^{[1
,2
]}

Dang, Jie ^{[1
,2
]}

Hu, Liwen ^{[1
,2
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Chongqing Key Lab Vanadium Titanium Met & Adv Mat, Chongqing 400044, Peoples R China

[3] Coventry Univ, Fac Engn Environm & Comp, Sch Mech Aerosp & Automot Engn, Coventry CV1 5FB, W Midlands, England

来源：

FUEL | 2021年 / 289卷

基金：

中国国家自然科学基金;

关键词：

High-sulfur coal; Organic sulfur; Microwave; NaOH-H2O2; Sulfur-containing functional group; CHEMICAL DESULFURIZATION; PEROXYACETIC ACID; PYROLYSIS; MODEL;

D O I：

10.1016/j.fuel.2020.119800

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A novel technology of removing organic sulfur from coal was proposed by microwave irradiation combined with NaOH-H2O2. The organic sulfur removal degree and the transformation of sulfur-containing compounds in coal was also analyzed using Inductively coupled plasma (ICP) and Fourier transform infrared (FTIR) during desulfurization. The changes of bond order, bond length, Fukui indices and electrostatic potential charge of sulfur containing bond were further calculated to support the experimental results. The results show that organic sulfur is mainly transformed into SO32- and SO42- under solvent-assisted microwave irradiation. For three typical organic sulfur functional groups, the disulfide bond (S-S) is the easiest to remove, while the sulfuryl (S=O) is the hardest to remove, which could be explained by the strength of the sulfur-containing bond and the reactivity of S atoms in different functional groups. The order of bond lengths of the sulfur-containing bond is S-S > -SH > S=O. Furthermore, the reactivity of S atoms is much higher than that of C atoms in coal matrix, indicating that this method can be used as an effective process on the removal of organic sulfur without destruction of coal matrix.

引用

页数：8

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