摘要
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 。
X ray absorption fine structure (XAFS) spectroscopy and XRD technique were used to investigate the structure, chemical state and dispersion of the in situ impregnated iron catalyst on the surface of three coal samples. In the as prepared state, the catalyst exhibits non crystal structure and high dispersion on the coal surface, and the difference in dispersion on the coal samples depends on the chemical nature of the coal surface. The iron impregnated on the coal samples exhibits FeOOH structure owing to the oxidation in air.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2000年第2期165-168,共4页
基金
国家杰出青年科学基金资助 !(29725614)
关键词
硫化铁
原位担载
煤液体
铁系催化剂
iron sulfide, in-situ impregnation, catalyst precursor, coal liquefaction, X-ray absorption fine structure, X-ray diffraction
