同心环波纹碟片旋转床制备纳米碳酸钙

华南理工大学学报（自然科学版） ›› 2006, Vol. 34 ›› Issue (12): 105-109.

同心环波纹碟片旋转床制备纳米碳酸钙

潘朝群俞乐张亚君邓先和田东磊

华南理工大学传热强化与过程节能教育部重点实验室, 广东广州 510640

收稿日期:2006-01-04 出版日期:2006-12-25 发布日期:2006-12-25
通信作者: 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
作者简介: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.

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

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.

摘要/Abstract

摘要： 利用同心环波纹碟片式超重力旋转床制备粒径范围在20~ 30 nm的纳米碳酸钙样品, 并对影响其生成的因素进行了研究. 实验结果表明: 纳米碳酸钙的粒径随转速、气流量、气相中CO₂的含量、晶形控制剂用量的增加而减小, 在C a( OH ) ₂浓度较低的条件下,粒径随Ca( OH ) ₂浓度的增加而减小; 反应时间随转速、气流量、CO₂含量的增加而减小,随晶形控制剂用量的增加而增加; 在旋转床转速约为1 100 r /min、CO₂ 含量约为40% (体积分数)、晶型控制剂用量为Ca( OH )₂ 质量的0. 5% 时, 产品的粒径较小, 反应的时间较短, 是反应的最佳操作点.

关键词: 超重力旋转床, 纳米碳酸钙, 同心环波纹碟片

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

潘朝群俞乐张亚君邓先和田东磊. 同心环波纹碟片旋转床制备纳米碳酸钙[J]. 华南理工大学学报（自然科学版）, 2006, 34(12): 105-109.

Pan Zhao-qun Yu Le Zhang Ya-jun Deng Xian-he Tian Dong-lei. Preparation of Nano-Sized Calcium Carbonate Using Rotating Packed Bed with Homocentric Ring Discs as Filling[J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34(12): 105-109.

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