高硫煤电化学催化氧化脱硫机理的研究

电化学催化氧化脱硫方法是一种温和的化学脱硫方法,它比常规的物理和化学脱硫方法更具优势,对于无机硫(FeS2)和有机硫都有一定的脱除效果。但其脱硫机理至今还没有完全弄清楚。本文以石坷节高硫煤样为原料,在酸性体系下,利用电化学催化氧化方法对煤样进行了处理。并利用X射线衍射(XRD)、X射线荧光光谱(XRF)等现代测试手段研究煤中矿物成分,矿物元素含量的变化,以及电解液组分变化。研究表明,电化学催化氧化脱硫是借助电解阳极表面产生活性氧等氧化剂或高价离子氧化煤中的硫,将煤中黄铁矿硫和有机硫化物转化成水溶性的硫化合物,从而达到脱硫的目的。通过试验分析也可得出,加入的催化剂离子也参与了反应,加速了脱硫的进程。

Mechanism of High-Sulfur Removal from Coal by Electrolytic Oxidation

The method of desulfurization by electrochemically catalytic oxidation is a mildchemical one,which has more advantagesthanconventionalphysical and chemicalmethods.Furthermore,it has some effects on the removal of inorganicsulfur such asFeS2 or organicsulfur,but itsdesulfurization mechanismisstillnot fully understood.This paper used the method of electrochemical oxidation desulfurization to process the coal in acidicsystem and used XRD,XRF,and other modern testing technology to analyze the mineral composition,changes in content of mineral element and electrolyte component.The research showed that the pyrite sulfur and the organic sulfide were converted into water-soluble sulfur compounds through the electrolysis anode surface producing active oxygen and other oxidants or sulfur in high ions oxidized coal when the method of desulfurization by electrochemically catalytic oxidation was used.The test analysis finds that the added catalyst ions are also involved in the reaction and the process of desulfurization is accelerated.