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煤裂解过程中负载铁化学形态的变化
引用本文:朱珍平,巨新.煤裂解过程中负载铁化学形态的变化[J].燃料化学学报,1996,24(1):49-53.
作者姓名:朱珍平  巨新
作者单位:中国科学院山西煤炭化学研究所,中国科学院高能物理研究所
基金项目:国家自然科学基金,煤转化国家重点实验室资助
摘    要:应用EXAFS、XANES和XRD方法研究了褐煤中负载铁在裂解过程中化学形态的变化规律。结果表明,在载FeCl3.6H2O煤中,铁与煤表面碳-氧官能团发生强烈的相互作用。随热处理温度的升高,铁化学形态以如下顺序递变:高分散Fe-O/C络合物,超细FeOOH,晶态Fe3O4,晶还原态铁(α-Fe,(Fe,C))《

关 键 词:  裂解    催化剂

CHANGE OF CHEMICAL FORMS OF IRON LOADED ON COAL DURING PYROLYSIS
Zhu Zhenping,Gu Yongda,Wu Dong.CHANGE OF CHEMICAL FORMS OF IRON LOADED ON COAL DURING PYROLYSIS[J].Journal of Fuel Chemistry and Technology,1996,24(1):49-53.
Authors:Zhu Zhenping  Gu Yongda  Wu Dong
Abstract:The changes of the chemical forms of iron species loaded on a brown coal during pyrolysis have been studied by X-ray diffraction and X-ray absorption spectroscopy.For the FeCl_3-impregnated coal,there is a strong interaction between the Fe atoms and the carbon-oxygen functional groups on the surface of coal.With an increase of heat treatment temperature, the chemical form of the iron species changed stepwise as follows: a highly dispersed iron species,ultrafine particles of FeOOH, crystalline Fe_3O_4,and crystalline reductive species such as a-Fe and(Fe,Q).
Keywords:coal  pyrolysis  iron catalyst  chemical form  
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