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EFFECT OF SIEVING AND ISOPROPANOL ON THE FLUIDIZATION BEHAVIOR OF TIO_2 NANOPARTICLES

机译:筛分和异丙醇对TiO_2纳米粒子流化行为的影响

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The fluidization of ABF nanoparticles has gained the attention of many researchers due to its interesting applications but difficult fluidization. Typically, these particles are sieved to remove the large agglomerates that are formed during storage. Otherwise, the larger agglomerates stay near the distributor plate, hindering the proper fluidization of the nanoparticles due to the formation of channels throughout the bed. To solve that, several papers propose to improve the fluidization conditions using external assistance methods. Such methods impose an external force that can break up the agglomerates; examples are magnetic or electric fields, vibration or centrifugal beds [1]. A different approach is to change the surface properties of the nanoparticles, decreasing the cohesive forces. Tahmasebpooret al. [2] analysed the influence of the hydrogen bonds during the fluidization of nanoparticles. They showed that the use of isopropanol vapour (ISP) in the fluidizing gas can reduce the cohesive forces between nanoparticles increasing the bed aspect ratio.
机译:由于其有趣的应用而是难以流化,ABF纳米粒子的流化因其具有困难的应用而受到许多研究人员的注意。通常,筛分这些颗粒以除去在储存期间形成的大聚物。否则,较大的附聚物保持在分配器板附近,由于整个床的形成通道而阻碍纳米颗粒的适当流化。为了解决这个问题,一些论文建议使用外部辅助方法改善流化条件。这些方法施加了可以分解聚集体的外力;实例是磁性或电场,振动或离心床[1]。不同的方法是改变纳米颗粒的表面性质,降低内聚力。 Tahmasebooret al。 [2]分析纳米颗粒流化过程中氢键的影响。他们表明,在流化气体中使用异丙醇蒸气(ISP)可以减少纳米颗粒之间的内聚力,增加床纵横比。

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