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Characteristics of Continuous Preparation of ZnO Powder in a Micro Drop/bubble Fluidized React
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  • Journal title : Korean Chemical Engineering Research
  • Volume 53, Issue 5,  2015, pp.597-602
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2015.53.5.597
 Title & Authors
Characteristics of Continuous Preparation of ZnO Powder in a Micro Drop/bubble Fluidized React
Lee, Seung Ho; Yang, Si Woo; Lim, Dae Ho; Yoo, Dong Jun; Lee, Chan Ki; Kang, Gyung Min; Kang, Yong;
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 Abstract
Characteristics of continuous preparation of ZnO powder were investigated in a micro drop/bubble fluidized reactor of which diameter and height were 0.03 m and 1.5 m, respectively. The flow rate of carrier gas for transportation of precursors to the reactor was 6.0 L/min and the concentration of Zn ion in the precursor solutions was 0.4 mol/L, respectively. Effects of reaction temperature (973 K~1,273 K) and flow rate of micro bubbles (0~0.4 L/min) on the pore characteristics of prepared ZnO powder were examined. The optimum reaction temperature for the maximum porosity in the ZnO powder was 1,073 K within this experimental condition. The mean size of ZnO powder prepared continuously in the reactor decreased but the surface of the powder became smooth, with increasing reaction temperature. The injection of micro bubbles into the reactor could enhance the formation of pores in the powder effectively, and thus the mean BET surface area could be increased by up to 58%. The mean size of prepared ZnO powder was in the range of depending on the reaction temperature.
 Keywords
Micro drop;Fluidized reactor;ZnO;BET;Particle Size;Pore Size;
 Language
Korean
 Cited by
1.
Nitrate-Citrate 혼합 전구체로부터 ZnO 입자의 합성반응 특성,양시우;이승호;임대호;유동준;강용;

Korean Chemical Engineering Research, 2016. vol.54. 3, pp.299-304 crossref(new window)
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