摘要
介绍了表征重油组分宏观尺寸的流体力学性质关联法、小角散射法以及电子显微镜成像法。流体力学性质关联法主要用来计算重油组分分子尺寸,而小角散射法和电子显微镜成像法则用来表征沥青质胶粒形态尺寸。在对上述各方法的基本原理、应用条件和存在问题进行分析概括的基础上,认为沥青质胶粒尺寸、形状和分布的表征方法比较成熟;黏度-扩散系数联合法研究极稀溶液区重油组分的流体力学性质,是表征重油组分尤其是沥青质分子形态尺寸的一种有效方法。
Several methods of characterizing the macroscopic size of heavy oil fractions are introduced. These methods mainly include hydrodynamic properties correlation method, small-angle scattering method and electron microscopy imaging method. The hydrodynamic properties correlation method is mainly used to compute the molecular size of heavy oil fractions, but the size and shape of asphaltene colloid particle are characterized by the small-angle scattering method and electron microscopy imaging method. The basic principle, condition of application and problem of these methods are also analyzed and summarized. Based on the analysis, the characterization methods of size, shape and distribution of asphaltene colloid particle are relatively mature, and the viscosity-diffusion coefficient combination method that investigates the hydrodynamic properties of heavy oil fractions in extremely dilute solution is a good way to characterize the molecular shape and size of heavy oil fractions, especially asphaltene.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2008年第11期1696-1702,共7页
Chemical Industry and Engineering Progress
基金
国家973计划子课题(2006CB202505)
关键词
分子尺寸
胶粒
流体力学性质
特性黏度
扩散系数
小角散射
电子显微镜
molecular size
colloid particle
hydrodynamic property
intrinsic viscosity
diffusion coefficient
small-angle scattering
electron microscopy
