Mechanism of sulfur removal from coal by microwave assisted acetic acid-hydrogen peroxide system

IF 2.1 3区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Sulfur Chemistry Pub Date : 2023-04-01 DOI:10.1080/17415993.2022.2118539

Sidan Cheng , Mei Li , Shiyong Xu , Ning Ding , Jinsong Yue , Hui Li

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引用次数: 1

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.

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微波辅助醋酸-过氧化氢体系脱除煤中硫的机理

比较了微波、超声波和紫外线辅助下醋酸-过氧化氢体系对宁夏双马煤的脱硫效果。结果表明，微波辅助脱硫效果最好。当微波功率为900W，辐照时间为5min，醋酸与过氧化氢体积比为1:10时，脱硫率可达55.82%。此外，微波辅助脱硫可以有效地提高有机硫的去除效果。XRD、XPS、SEM等表征表明，微波辅助能有效降低矿物含量，暴露更多含硫基团，提高脱硫效果。三种含硫化合物的脱硫率为:二苄基硫化物>二苯基亚砜>苯并噻吩。随着外加电场强度的增加，C-S键更容易断裂，外加电场可以降低反应能垒，对反应有利。图形抽象

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来源期刊

Journal of Sulfur Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

4.10

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Sulfur Chemistry is an international journal for the dissemination of scientific results in the rapidly expanding realm of sulfur chemistry. The journal publishes high quality reviews, full papers and communications in the following areas: organic and inorganic chemistry, industrial chemistry, materials and polymer chemistry, biological chemistry and interdisciplinary studies directly related to sulfur science. Papers outlining theoretical, physical, mechanistic or synthetic studies pertaining to sulfur chemistry are welcome. Hence the target audience is made up of academic and industrial chemists with peripheral or focused interests in sulfur chemistry. Manuscripts that truly define the aims of the journal include, but are not limited to, those that offer: a) innovative use of sulfur reagents; b) new synthetic approaches to sulfur-containing biomolecules, materials or organic and organometallic compounds; c) theoretical and physical studies that facilitate the understanding of sulfur structure, bonding or reactivity; d) catalytic, selective, synthetically useful or noteworthy transformations of sulfur containing molecules; e) industrial applications of sulfur chemistry; f) unique sulfur atom or molecule involvement in interfacial phenomena; g) descriptions of solid phase or combinatorial methods involving sulfur containing substrates. Submissions pertaining to related atoms such as selenium and tellurium are also welcome. Articles offering routine heterocycle formation through established reactions of sulfur containing substrates are outside the scope of the journal.