柴油机烟炱形貌、结构与组成的表征  

Characterization on the Morphology,Nanostructure and Composition of Diesel Soot

作　　者：苏鹏[1] 熊云[1] 刘晓[1] 杨鹤[2] 范林君[1] SU Peng;XIONG Yun;LIU Xiao;YANG He;FAN Linjun(Department of Oil Application &Management Engineering, Logistic Engineering University, Chongqing 401311, China;Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China)

机构地区：[1]后勤工程学院军事油料应用与管理工程系,重庆401311 [2]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2017年第6期1159-1166,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：全军后勤科研计划重点项目(BX214C006);重庆高校优秀成果转化项目(KJZH17139)资助

摘　　要：收集了3种扭矩下的柴油机烟炱,通过高分辨率透射电子显微镜、X射线衍射仪、拉曼光谱仪、X射线光电子能谱仪等表征手段,考察了3种柴油机烟炱的形貌、结构及化学组成;并结合柴油机缸内的燃烧参数,探讨了扭矩对产生烟炱影响的原因。结果表明:烟炱的平均粒径为28~34nm,外壳为乱层石墨结构,厚度为3~14nm;内核为无定型碳,内径为3~7nm。烟炱的平均粒径及外壳石墨层厚度均随柴油机扭矩的增加而增大。烟炱由C、O、H、N元素组成,其表面官能团以C—C和C—H为主,C—O单键含量次之,C=O键含量最少;烟炱表面C—O单键和C=O键的含量随柴油机扭矩的增加而降低。Diesel exhaust soot was collected at three operating conditions from a diesel engine.The morphology,structure and composition of three kinds of diesel soot were investigated by means of high resolution transmission electron microscopy(HRTEM),Xray diffraction(XRD),Raman spectrometry,and Xray photoelectron spectroscopy methods(XPS).Results showed that diesel soot varied in diameter from28nm to34nm and all diesel soot exhibited the coreshell structure.The inner core is composed by amorphous domains,while the out shell is graphite but in a turbstratic fashion.The inner core is of around3-7nm in diameter and the out shell3-14nm thick.It is found that the primary particle size and graphitic layer thickness increases with engine load.Soot is consisted of carbon,oxygen,hydrogen,nitrogen and among the functional groups on the soot surface the content of C-C and C-H is the highest,next is C-O,followed by C=O.The oxygencontaining functional groups decrease with the increase of engine load.

关 键 词：烟炱 柴油机扭矩 形貌 微观结构 组成 

分 类 号：TQ038.7[化学工程]