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首页> 外文期刊>Kinetics and catalysis >Synthesis of aluminum oxides from the products of the rapid thermal decomposition of hydrargillite in a centrifugal flash reactor: II. Physicochemical properties of the products obtained by the centrifugal thermal activation of hydrargillite
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Synthesis of aluminum oxides from the products of the rapid thermal decomposition of hydrargillite in a centrifugal flash reactor: II. Physicochemical properties of the products obtained by the centrifugal thermal activation of hydrargillite

机译：在离心闪蒸反应器中由水闪石快速热分解的产物合成氧化铝：II。硅藻土离心热活化所得产品的理化性质。

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摘要

A variety of physicochemical methods were used to characterize the product of the rapid thermal decomposition of hydrargillite in a centrifugal flash reactor under the following conditions: the average particle size of the reactant, 80-120 mu m; the temperature of the solid heating surface (plate or cylinder), 300-700 degrees C; hot-zone residence time, similar to 1 s; transfer of the product to the cooled zone of the reactor. The composition of the product and the extent of decomposition of hydrargillite were determined as a function of the processing temperature. The centrifugal thermal activation (CTA) of hydrargillite affords an X-ray-amorphous, highly reactive product with a developed surface and a disordered and inhomogeneous porous structure. This structure is capable of forming different modifications of aluminum hydroxide and oxide. The properties of the CTA product are compared with the properties of the earlier reported hydrargillite rapid decomposition products obtained using a gaseous heat-transfer agent (thermochemical activation product) or a fluidized bed of a granular heat-transfer agent (thermal dispersion product).
机译：在以下条件下，采用多种物理化学方法表征了水闪石在离心闪蒸反应器中快速热分解的产物：反应物的平均粒径为80-120μm;固体加热表面（板或圆柱体）的温度为300-700摄氏度;热区停留时间，类似于1 s;将产物转移到反应器的冷却区。确定产物的组成和水辉石的分解程度作为加工温度的函数。硅藻土的离心热活化（CTA）提供了X射线无定形，高反应性的产品，具有发达的表面和无序且不均匀的多孔结构。该结构能够形成氢氧化铝和氧化物的不同改性。将CTA产物的性质与较早报道的使用气态传热剂（热化学活化产物）或颗粒状传热剂的流化床（热分散产物）获得的水闪石快速分解产物的性质进行比较。

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