摘要
对西北地区石炭纪高硫煤进行热解实验,考察了热解温度(200℃～1 000℃)和热解停留时间(20min～100min)对煤中形态硫的迁移特性的影响,并通过FTIR分析了热解过程中半焦的结构变化情况.研究表明,高硫煤中全硫随热解温度的升高先减小后增大,在600℃时达到最低;硫酸盐硫的含量较低,维持在0%～0.5%之间;硫化铁硫随着热解温度的升高逐渐减小;有机硫随热解温度的升高先减小后增大,在500℃时达到最低.无机硫脱除率高于有机硫脱除率.煤热解过程中氧和硫等杂原子官能团在半焦中不断减弱.
The pyrolysis experiment of carboniferous high sulfur coal form northwest area of China was made. The influence of different pyrolysis temperature （200℃ to 1 000℃） and different holding time （20 min to 100 min） on the changes of sulfur forms content were investigated. FTIR was used to analyze the coal samples and their products. The pyrolysis experiment shows that the total sulfur increases firstly with temperature rising and then decreases, reaching to the lowest at 600℃. Sulfate sulfur content is low at a range of 0%-0.5%. Pyrites sulfur decreases with the temperature. Organic sulfur content firstly decreases and then increases with the pyroly- sis temperature rising. At 500℃, organic sulfur decreases to the lowest. The pyrites sulfur re- moved rate is higher than the rate of organic sulfur. The heteroatom functional groups of oxygen and sulfur in semi-cokes decrease with the rising temperature.
出处
《煤炭转化》
CAS
CSCD
北大核心
2012年第2期17-21,共5页
Coal Conversion
基金
国家自然科学基金资助项目(41172142/D0208)
关键词
热解
形态硫
迁移
FTIR
pyrolysis, sulfur forms, transformation, FTIR
