Development of copper impregnated porous granulates for chemical-looping combustion
Development of copper impregnated porous granulates for chemical-looping combustion
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DOI：
10.1016/j.fuel.2013.11.063
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发表时间：
2014-03
期刊：
影响因子：
7.4
通讯作者：
N. V. Garderen;F. Clemens;T. Graule
中科院分区：
文献类型：
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作者：
N. V. Garderen;F. Clemens;T. Graule
采用挤压法制备了粘土、氧化铝和硅藻土基高孔支撑体。通过硅藻土和粘土的结合，得到了宏观结构，而对于氧化铝组成，则产生了介孔结构。基于氧化铝和硅藻土的复合材料产生了系统可调的宏观结构。因此，有可能增加总孔体积，并实现从中孔到大孔范围的定制微结构。为了验证所开发的化学链燃烧(CLC)载体的可行性，对选定的样品进行了1.5M三水硝酸铜浸渍。在硅基样品(粘土、硅藻土)中主要存在CuO和Cu2O相，而在氧化铝含量较高的样品中以CuAl2O4尖晶石相为主。用CO~(2+)和N_2或O_2~+和N_2气体的热重法验证了CLC的性能。γ-氧化铝-硅藻土复合载体材料的性能最好。
Highly porous supports based on clay, alumina and diatomite were developed using extrusion method. By combination of diatomite and clay, a macrostructure was obtained, whereas with alumina composition a mesoporous structure occurred. Composites based on alumina and diatomite result in a systematically tunable macrostructure. Therefore it was possible to increase the total pore volume and achieve a tailored microstructure from the meso- to macropore range. To verify the workability of the developed supports for chemical-looping combustion (CLC), impregnation with 1.5 M copper nitrate trihydrate was performed on selected samples. Presence of mainly CuO and Cu2O phases were obtained in silica based samples (clay, diatomite), whereas CuAl2O4spinel phase dominated in samples with high alumina content. CLC performance was verified by thermogravimetry using CO + N2or O2+ N2gases. The highest performance could be achieved with the γ-alumina–diatomite composite support material.