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›› 2009, Vol. 9 ›› Issue (3): 424-430.

• 流动与传递 • Previous Articles     Next Articles

Mass Transfer and Kinetics in Preparation of Light Magnesium Carbonate by Stream-recycling Carbonation

YI Hong CHI Ru-an ZHU Guo-cai ZHAO Yu-na ZHAO Yu-na TIAN Jun   

  1. Wuhan Institute of Technology, Key Laboratory for Green Chemical Process of Minstry of Education, Hubei Key Laboratory of Novel Chemical Reactor & Green Chemical Technology Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology，Wuhan Institute of Technology Institute of Nuclear and New Energy Technology, Tsinghua University Wuhan Institute of Technology, Key Laboratory for Green Chemical Process of Minstry of Education, Hubei Key Laboratory of Novel Chemical Reactor & Green Chemical Technology Institute of Nuclear and New Energy Technology, Tsinghua University The Institute of Applied Chemistry, Jianxi Academy of Science
  • Received:2008-10-31 Revised:2009-03-16 Online:2009-06-20 Published:2009-06-20
  • Contact: CHI Ru-an

循环碳化法制备轻质碳酸镁的传质及动力学

伊弘 池汝安 朱国才 张越非 赵玉娜 田君   

  1. 武汉工程大学绿色化工过程省部共建教育部重点实验室，湖北省新型反应器与绿色化学工艺重点实验室 武汉工程大学 湖北省新型反应器与绿色化学工艺重点实验室 清华大学核能技术设计研究院 武汉工程大学绿色化工过程省部共建教育部重点实验室，湖北省新型反应器与绿色化学工艺重点实验室 清华大学核能技术设计研究院 江西省科学院应用化学研究所
  • 通讯作者: 池汝安

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Abstract: The mass transfer and kinetics on the preparation process of light magnesium carbonate by stream-recycling carbonation were studied. The influences of gas flow, distribution proportion of gas and particle size, etc., on the process of stream-recycling carbonation were examined. At the same time, its model of stream-recycling reaction was built theoretically. The results show that the process of stream-recycling carbonation is controlled by diffusion mass transfer within 10~25℃, of which activation energy is 18.6 kJ/mol, while controlled by diffusion mass transfer and surface chemical reaction altogether within 25~35℃, of which activation energy is 33.15 kJ/mol.

Key words: stream-recycling carbonation, light magnesium carbonate, magnesite, mass transfer, kinetics

摘要： 采用循环碳化浸取制备轻质碳酸镁，对循环碳化过程进行了传质过程及动力学研究. 考察了气体流量、配气比例、粒度等因素对循环碳化过程的影响，从理论上建立了循环碳化过程的传质和反应动力学模型. 计算推导及实验结果表明，在温度10~25℃区间，其表观活化能为18.6 kJ/mol，扩散传质为循环碳化过程控制步骤；而在25~35℃区间，其表观活化能为33.15 kJ/mol，循环碳化过程由传质扩散与表面化学反应混合控制.

关键词: 循环碳化, 轻质碳酸镁, 菱镁矿, 传质, 动力学

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