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Fluidization dynamic characteristics of carbon nanotube particles in a tapered fluidized bed

Chinese Journal of Chemical Engineering 2022年第4期35卷 321-331页

作者： Wenjuan Bai Dianming Chu Yan He Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science and TechnologyShandong 266061China

In this work,a tapered fluidized bed(TFB)without a distributor for fluidizing carbon nanotube(cnt)was applied for improving the dead zone,blockage,and fracture of distributor,which occurred in actual *** were performed under different superficial gas velocities,static bed heights,cnt agglomerate size,and positions of pressure *** obtain multi-perspective and multi-scale understanding of fluidization dynamics of gas–cnt flow in the TFB without a distributor,the standard deviation,skewness,kurtosis,wavelet decompositions and homogeneous index analysis methods were *** noticeable phenomena were *** movements including inter-particle,gas–particle and particle–wall dominate dynamic *** amplitudes of pressure fluctuations of coarse agglomerated multi-walled cnt were more sensitive to the gas velocity than that of fine agglomerated multi-walled *** sensitively of energy contribution of the meso-and macrostructures was that the sensitivity of the measured position was less than the sensitivity of the energy contribution by the changes of particle size,and the sensitivity of the energy contribution by the changes of particle size was less than the energy contribution by the changes of gas *** fluidization quality of coarse agglomerated multi-walled cnt was better than that of fine agglomerated multi-walled cnt,which was verified by the skewness and wavelet analysis.

关键词： Tapered fluidized bed gas–cnt flow Pressure fluctuation Wavelet Homogeneous index Carbon nanotubes

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