【摘要】 分别测定了纯煤样和浸渍煤样的小角Ｘ射线散射，基于ＧＢＣ理论假设，采用相关函数法计算了原位担载于两种烟煤上ＦｅＳＯ４ 的粒径分布，考察了助剂Ｎａ２Ｓ和尿素的添加对其粒径分布的影响． 计算结果与ＸＲＤ表征结果相似． ＦｅＳＯ４ 在两种煤样上的最可几粒径为４ ｎｍ 左右，分布范围为０－５ ～８ ｎｍ ． 助剂对ＦｅＳＯ４ 粒径分布的影响较小，它们的添加主要是改变了催化剂前驱体的活性组成．更多还原

【Abstract】 Based on the Goodisman Brumberger Cupelo (GBC) hypothesis, a method for processing small angle X ray scattering (SAXS) data of a three phase system was used to determine particle size distribution of FeSO 4 based catalysts impregnated on two bituminous coal samples. The characterization of the catalyst phase is obtained from its correlation function, which is the difference in SAXS data between the impregnated coal and the untreated one. The results, in agreement with XRD and EXAFS characterization, showed that the FeSO 4 dispersed on coal surface has the most probable diameter of ca 4 nm and a distribution range from 0 5 nm to 8 nm. Addition of Na 2S and urea, although significantly improved liquefaction conversion, showed only a little effect on FeSO 4 size distribution. It is possible that the addition of Na 2S and urea mainly changes the active form of the catalyst precursor.更多还原