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http://dx.doi.org/10.9713/kcer.2019.57.1.105

Effect of Height on CNT Aggregates Size and Shape in Freeboard Region of a Fluidized Bed  

Kim, Sung Won (Department of Chemical and Material Engineering, Korea National University of Transportation)
Publication Information
Korean Chemical Engineering Research / v.57, no.1, 2019 , pp. 105-110 More about this Journal
Abstract
Effect of height on the size and shape of carbon nanotube (CNT) aggregates in the freeboard region of a bubbling fluidized bed ($0.15m\;i.d.{\times}2.6m\;high$) has been determined. Feret diameter and Heywood diameter of the CNT aggregates in the freeboard region of fluidized bed increased with increasing gas velocity. The average aggregate diameters and CNT particle number in the aggregates decreased with increasing of height in the freeboard. Aspect ratio increased as the location was closer to the surface of the dense phase, but decreased at the highest location. Solidity did not show any significant changes with height. The results showed the aggregates formation process is affected by the height in the freeboard. A correlation was proposed to predict the Heywood diameter of the CNT aggregates.
Keywords
Carbon nanotube; Fluidized bed; Aggregates; Shape; Height effect;
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Times Cited By KSCI : 1  (Citation Analysis)
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