烟气脱硫
煤
微波食品加热
机制(生物学)
动作(物理)
过程(计算)
化学
工艺工程
环境科学
计算机科学
有机化学
物理
工程类
电信
量子力学
操作系统
作者
Longfei Tang,Shiwei Wang,Huan He,Feng Li,Lei Zheng,Songjiang Chen,Zhao Yang
出处
期刊:Fuel
[Elsevier]
日期:2018-02-01
卷期号:214: 554-560
被引量:24
标识
DOI:10.1016/j.fuel.2017.10.087
摘要
Abstract To clarify the action mechanisms of microwave field with peroxyacetic acid in the process of sulfur removal from coal, this study was carried out on the molecular level and diphenyl sulfide was selected as the sulfur model compound of coal. Its oxidation reaction path was determined utilizing XANES and GC/MS. The transmission reflection method was adopted to analyze the dielectric property of the substances detected before. Their C S bond dissociation energies (BDEs), bond dissociation times (BDTs) and the intrinsic reaction coordinate of desulfurization reactions were calculated under various extra electric fields to support the experimental results. Results showed that most of diphenyl sulfide was oxidized to the corresponding sulfoxide and sulfone, resulting in a desulfurization degree of 22.37% after microwaving treatment at 500 W for 120 s combined with peroxyacetic acid. With the oxidation degree deepening, the absorption efficiency of microwave energy for sulfur groups increased and their C S BDEs decreased, resulting in the reducing of their C S BDTs. In addition, the C S BDTs and the barrier of desulfurization reactions were reduced under the extra electric field. These findings confirmed that the sulfur-containing bonds cleavage and desulfurization reactions of sulfur groups were promoted under the extra microwave field with peroxyacetic acid, which is conducive to the effective removal of sulfur groups from coal.
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