摘要
为了深入了解煤中活惰组分的相互作用机理以及完善配煤炼焦理论,富集艾维尔沟煤中镜质组(活性组分)等比例配入标准无烟煤(惰性组分)并热解至不同温度(600℃~1000℃)后骤冷(液氮)制成焦样,利用X射线衍射(XRD)和拉曼光谱表征以研究焦样的结构演化规律。结果表明:艾维尔沟煤镜质组与标准无烟煤等比例混配形成的焦样随着成焦温度的升高,焦的微晶尺寸和芳香度逐渐增大,堆垛高度先降低后升高,芳香片层堆积个数先降低又升高,焦的结构无序先增加后减小,石墨化程度则先下降后增加,碳微晶结构参数均在900℃发生转折,说明艾维尔沟肥煤热解固化成焦时继续缩聚反应至900℃后才开始石墨化进程并由焦转变为焦炭。
In order to research the interaction mechanism of active and inert components in coal and improve the coal blending coking theory,the vitrinite(active component)enriched from the Ewirgol coal was added to the standard anthracite(inert component)in equal proportion.The blended coals were pyrolyzed at different temperatures(600℃~1000℃),and quenched by liquid nitrogen to prepare chars,the structure evolutions of chars were studied by X-ray diffractometer(XRD)and laser Raman analyzer.The results show that with the increase of coking temperature,the microcrystal size and aromaticity of chars gradually increase,the average stacking height decreases firstly and then increases,the number of aromatic sheets decreases firstly and then increases.The disorder degree of char structure increases firstly and then decreases,the graphitizing degree decreases firstly and then increases.The turning point temperature for these structural parameters of carbon microcrystals is 900℃,which indicates that the chars derived from the Ewirgol coal go on with aromatic condensation to 900℃and turn into graphitization process.
作者
王英新界
王重阳
张超
王文婷
蔡雪贞
李金泽
孙章
WANG Yingxinjie;WANG Chongyang;ZHANG Chao;WANG Wenting;CAI Xuezhen;LI Jinze;SUN Zhang(College of Chemical Engineering,North China University of Science and Technology,Tangshan 063210,China)
出处
《煤质技术》
2020年第1期6-11,共6页
Coal Quality Technology
基金
国家自然科学基金煤炭联合基金资助项目(U1361212)
华北理工大学国家级大学生创新创业训练计划资助项目(201710081033)
关键词
结构演化
镜质组
成焦
艾维尔沟煤
X射线衍射
拉曼光谱
芳香度
石墨化程度
structure evolution
vitrinite
coking
Ewirgol coal
X-ray diffraction
Raman spectrum
aromaticity
degree of graphitization
