通过原位担载法将铁系催化剂担载于煤表面 ,考察了催化剂前驱体的相态、配位环境以及在载体表面的分散状态 .采用X射线吸收精细结构和X射线衍射法对原位担载型铁系催化剂前驱体进行了表征 .结果表明 ,催化剂前驱体在煤表面以非晶态、高分散的形式存在 ,其化学组成主要为FeOOH ,且催化剂前驱体的分散程度与载体煤的物理化学性质有关 The iron-based catalyst was supported on the coal surface by in-situ loading method, and the phase state, coordination environment and dispersion state on the surface of the catalyst precursor were investigated. X-ray absorption fine structure and X-ray diffraction The results showed that the catalyst precursor existed in the form of amorphous and highly dispersed on the surface of coal, and its chemical composition was mainly FeOOH, and the degree of dispersion of catalyst precursor was similar to that of carrier coal Physicochemical properties