煤直接液化铁催化剂的研究进展(Ⅰ)担载铁催化剂的表征及研究方向

DEVELOPMENT OF IRON BASED CATALYSTS FOR THE DIRECT LIQUEFACTION OF COAL PART(Ⅰ) CHARACTERIZATION AND RESEARCH DIRECTION OF IMPREGNATED IRON CATALYSTS

对高分散担载铁催化剂的表征方法如 BET,SAXS,XRD,EXAFS,EPMA,XPS,Mossbauer谱等作了述评 ,并指出存在的问题及可能的解决方法 .要了解原位担载铁催化剂的化学组成、结构和在煤上的分散状况 ,必须采用多种分析手段综合进行 ,而现有任何手段都不能定量地测得催化剂在煤上的分散度 .同时指出如何量化表述催化剂在煤直接液化中的作用 ,催化剂的活性与煤本身的哪些性质相互关联是煤直接液化担载铁催化剂研究中的关键问题 .

The characterization methods for impregnated iron catalysts such as BET,SAXS,XRD, EXAFS, EPMA, XPS and Mossbauer spectroscopy were reviewed in this paper and the advantages and disadvantages of each method were discussed. To understand chemical composition, structure and dispersion of impregnated iron catalysts, a combination of various methods is needed. The key issues on impregnated iron catalysts include quantitative expression of catalytic effect and correlation of catalyst activity with coal properties.