Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (12): 105-109.

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Preparation of Nano-Sized Calcium Carbonate Using Rotating Packed Bed with Homocentric Ring Discs as Filling

Pan Zhao-qun  Yu Le  Zhang Ya-jun  Deng Xian-he  Tian Dong-lei   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education,South China Univ.of Teeh.,Guangzhou 510640,Guangdong,China
  • Received:2006-01-04 Online:2006-12-25 Published:2006-12-25
  • Contact: 潘朝群(1972-), 博士, 讲师. 主要从事超重力旋转床、传质和废气处理研究. E-mail:cezqpan@ scut. edu. cn
  • About author:潘朝群(1972-), 博士, 讲师. 主要从事超重力旋转床、传质和废气处理研究.

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Abstract:

Nano-sized calcium carbonate with the diameter between 20 to 30 Bin was prepared using the rotating packed bed with homocentric ring discs as the filing,and the factors which influence the production of the llano-sized calcium carbonate were investigated.Experimental results indicate that(1)the diam eter of the product de-creases with the increase in the rotational speed,the gas flux,the CO2 content in the gas phase an d the dosage of the crystal style controller;(2)when Ca(OH)2 concentration is fairly low,the diameter decreases with the in-crease in Ca(OH)2 concentration;(3)the reaction time decreases with the increase in the rotational speed,the gas flux and the CO2 content,but increases with the dosage of the crystal style controler;and(4)in the optimal preparation conditions,that is,a rotational speed of 1 100r/min,a CO2 content of 40%(volume fraction)and a dosage of the crystal style controler of 0.5%.the product is of small size an d the reaction time cost is faifly low.

Key words: rotating packed bed, nano-sized calcunium carbonate, homocentric ring disc