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氧载体是煤化学链燃烧技术的基础,惰性载体则是其中的必要组成部分,起着重要的作用。以Al2O3作为典型惰性载体,采用热重分析仪、红外频谱仪、场发射扫描电镜和能谱分析仪以及X衍射仪,对六盘水贫煤与Fe2O3、CuO基氧载体的反应进行了详细的研究。研究发现,Al2O3的引入,使得Fe2O3、CuO基氧载体表面积增大、孔径分布更为优化,而且对氧载体与六盘水贫煤一次热解产物的反应是有利的,能够促进氧载体中更多晶格氧的传递,Fe2O3基氧载体中有更多的Fe2O3还原为低于Fe3O4价态的氧化物,而CuO基氧载体中CuO除了还原为Cu、Cu2O外,其中的CuAl2O4也有一定的反应活性,被还原为CuAlO2。与LPS煤反应时,Fe2O3深度还原产物与部分Al2O3及煤中的SiO2反应生成Fe3Al2(SiO4)3,而CuO则与Al2O3及六盘水贫煤反应生成了(Cu0.215Mg1.785)(Al4Si5O18)复合物。
Oxygen carrier is the basis of coal chemical combustion technology, inert carrier is one of the necessary components, plays an important role. The reaction of Liupanshan lean coal with Fe2O3 and CuO-based oxygen carrier was studied in detail with Al2O3 as a typical inert carrier, thermogravimetric analyzer, infrared spectrometer, field emission scanning electron microscopy and energy dispersive spectroscopy and X-ray diffractometer. It is found that the introduction of Al2O3 makes the surface area of Fe2O3 and CuO-based oxygen carriers larger and the pore size distribution more optimized. Moreover, the reaction of oxygen carrier and Liupanshui lean primary pyrolysis product is favorable, which can promote more polycrystalline Oxygen transfer, Fe2O3-based oxygen carrier more Fe2O3 reduction than the oxidation state of the valence of Fe3O4, and CuO-based oxygen carrier in addition to reduction of Cu, Cu2O, of which CuAl2O4 also have some reactivity, Is reduced to CuAlO2. When reacting with LPS coal, the deep reduction product of Fe2O3 reacted with some Al2O3 and SiO2 in coal to form Fe3Al2 (SiO4) 3, while CuO reacts with Al2O3 and Liupanshan lean coal to form (Cu0.215Mg1.785) (Al4Si5O18) complex .