化工进展2024，Vol.43Issue(4)：2210-2218,9.DOI:10.16085/j.issn.1000-6613.2023-0689
湿法脱硫中多硫离子分离方法的建立
Establishment of separation method for polysulfide ions in wet desulfurization
摘要
Abstract
Polysulfide ion Sx2- is an intermediate product of the conversion of H2S to elemental sulfur in wet catalytic oxidation desulfurization technology.In the desulfurization environment,there is a parallel competition between the sulfur evolution reaction and parasite reaction,and the existing form and concentration of Sx2- are the prerequisite for evaluating the degree of the two competitive reactions.In this paper,UV-vis,LC-MS,and HPLC methods were used to determine the existence and concentration of Sx2-.The results showed that the total concentration of Sx2- could be determined by the UV-vis method.The methylation method could capture each form of Sx2-,LC-MS and HPLC methods could separate each form of methylated polysulfide,and the larger the number of sulfur atoms(2-10)of Sx2-,the longer the retention time.Combined with the standard curve established by UV-vis and the relative intensity of each form of Sx2- on HPLC,the absolute concentration of each form of S2-in solution was calculated.S42-,S52-,S62- and S102- were the main types of sodium polysulfide solution,in which the concentration and pH had little effect on Sx2-,and the high temperature was not conducive to the formation of Sx2-,thus not conducive to the formation of elemental sulfur.This work laid a foundation for further research on the origin of parasites and the acceleration of sulfur evolution.关键词
多硫离子/湿法脱硫/硫化钠Key words
polysulfide ions/wet desulfurization/sodium sulfide分类
化学化工引用本文复制引用
高康,张弦,陈帅军,武喜明,申峻,王玉高,牛艳霞..湿法脱硫中多硫离子分离方法的建立[J].化工进展,2024,43(4):2210-2218,9.基金项目
国家自然科学基金(21606161). （21606161）
