摘要
对比研究了经水泡冷却和通氮气冷却方式制得的低温热解半焦的微观结构和理化性能差异.X射线衍射与傅立叶变换红外光谱分析结果表明:氮气冷却半焦样品的官能团强度和碳原子结构有序化程度比水泡冷却的样品高;氮气吸附结果表明:氮气冷却半焦比表面积较小,且10nm以下的孔隙发达程度不及水冷半焦;可磨性与转鼓强度测试结果表明:氮气冷却半焦样品的可磨性比水泡冷却半焦低20%,抗碎性能高于后者;热重分析结果表明:相较氮气冷却半焦,水冷半焦的燃烧着火点降低了19℃,平均燃烧速率更快,燃尽性能更好.
The different microstructure and physicochemical properties of low-temperature pyrolysis semi-coke which cooling by water and nitrogen were investigated.The results of Xray diffraction and FTIR spectroscopy analysis show that graphitization level of nitrogen cooling is higher than that of the semi-coke cooled by water.In addition,the C atoms of microcrystalline edge are less and the absorption peak of functional groups are weak of nitrogen cooling semi-coke sample.The BET analysis results indicate that the specific area of nitrogen cooling semi-coke is smaller and the micropores（the diameter is below 10 nm）are less than that of semi-coke cooled by water.The grindability and tumbler strength test results show that the wear resistance of nitrogen cooling semi-coke is 20% less than that of water cooling sample,and the broken-resistance of nitrogen cooling semi-coke is also higher than the latter.The TGA results also indicate that ignition temperature of water cooled semi-coke is lower than that of nitrogen cooling sample,while the water cooling semi-coke also has faster average burning rate and better combustion performance than semi-coke cooled by nitrogen.
出处
《煤炭转化》
CAS
CSCD
北大核心
2018年第1期13-18,共6页
Coal Conversion
基金
国家自然科学基金资助项目(51374166)
陕西省自然科学基础研究计划项目(2016JQ5041)
关键词
半焦
石墨化度
比表面积
可磨性
燃烧性能
semi-coke, graphitization degree, BET surface area, grindability, combustion performance
