摘要
采用XPS方法分别表征了低、中、高硫炼焦煤的硫赋存形态及分布,并利用TG-MS技术分析了三种煤的失重过程、主要气体和含硫气体的逸出情况.结果表明,三种焦煤的硫形态存在明显差异,中高硫煤中的无机硫比例显著高于低硫煤,噻吩类和亚砜类硫比例低于低硫煤.三种煤的失重过程大致相同且可分为释水及吸附气体的脱除、活泼热分解和二次热解三个阶段.焦煤在热解过程中不同含硫气体的逸出差异较大,但其与原煤中原有硫的形态和总量关系密切.
The chemical speciation of low,middle and high-sulfur coal was investigated,as well as the relative amount of sulfur in different kinds of coal with XPS method was analyzed.The weight loss and the pyrolysis gas escaping process were recorded by TG-MS.The result shows that the inorganic sulfur of the middle and high sulfur coal are significantly higher than that of the low-sulfur coal,while the relative amount of thiophene and sulfoxide are lower than that of low-sulfur coal.The weightlessness process of different kinds of coal are similar and can be divided into three stages:the release of water,the removal of the adsorbed gas,lively thermal decomposition and secondary pyrolysis.The escaping process of different sulfur-containing gases in the pyrolysis process is quite different,while it is closely related to the chemical speciation and the relative amount of sulfur in the coking coal.
出处
《煤炭转化》
CAS
CSCD
北大核心
2018年第2期24-30,共7页
Coal Conversion
基金
国家自然科学青年科学基金资助项目(No.51704223)
国家自然科学青年科学基金资助项目(No.51704224)
陕西省自然科学基金资助项目(2016JM5028)
校青年科技基金资助项目(6040501051)
校人才基金资助项目(DB04144)
关键词
炼焦煤
焦化
热解
有机硫
黄铁矿
coking coal
coking
pyrolysis
organic sulfur
pyrite
