微波氢氧化钠联合脱硫及机理分析

DESULFURIZATION BY MICROWAVE IRRADIATION COMBINED WITH SODIUM HYDROXIDE AND MECHANISM FOR REACTION

采用微波与氢氧化钠溶液协同法对乌海煤中硫进行脱除,通过正交实验确定了微波氢氧化钠溶液协同脱除煤中硫的最佳条件,考察了煤样粒度、氢氧化钠浓度、微波辐照时间和微波功率等因素对煤中硫脱除效果的影响,并对脱硫机理进行了分析.借助SEM,XRD,FTIR和XPS测试方法对实验前后的煤质进行了对比分析.结果表明,微波与氢氧化钠溶液协同可脱除煤中29.53%的硫分,煤的基本结构并未发生变化,煤中矿物含量减少.通过介电常数测试,研究了不同氢氧化钠浓度条件下的固体混合物对微波的介电响应情况,同时借助material studio软件模拟了电场效应对有机硫脱除的影响作用.

Desulfurization of Wuhai coal was carried out by microwave combined with sodium hydroxide solution.By the orthogonal experiment,the best desulfurization condition was ascertained,and the effect factors of desulfurization such as coal particle size,concentration of sodium hydroxide solution,microwave irradiation time and irradiation power were investigated.What＇s more,the desulfurization mechanism with this method was also analyzed.Through the comparative analysis to the spectrum of SEM,XRD and FTIR,the coal properties before and after the experiment were researched.The results indicated that sulfur of Wuhai coal can be removed off 29.53% by microwave in sodium hydroxide solution,and the coal matrix have no significant changes. What＇s more,the microwave dielectric response of solid mixtures were measured with different concentration of sodium hydroxide solution,and the effect of electric field to organic sulfur molecule was simulated and calculated by the software-materials studio.