Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (4): 532-536.

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Apparent Kinetics for Electrosynthesis Process of Chromic Acid

LI Cheng-wei1,2, WANG Fu-an2*, QI Tao3, WANG Rui-lin1, TANG Xiao-hong1 and ZHANG Yong-qiang1   

  1. 1. Department of Chemistry, Henan Institute of Education, Zhengzhou 450014, P. R. China;
    2. College of Chemical Engineering, Zhengzhou University, Zhengzhou 450002, P. R. China;
    3. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, P. R. China
  • Received:2008-10-27 Revised:2008-11-17 Online:2009-07-25 Published:2009-10-16
  • Contact: WANG Fu-an. E-mail: fuanwang@371.net
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20676136).

Abstract:

A new green technique for producing chromic acid via an electrosynthesis method was studied. The kinetic experiments were carried out on the direct electrosynthesis reaction of chromic acid from sodium dichromate in a self-made electrosynthesis reactor with a multiple-unit metal oxides combination anode, a stainless steel cathode, and a reinforcing combination Nafion®324 cation exchange membrane. The apparent kinetic data were experimentally measured at different reaction time under different reaction conditions by relating many essential cell processes and their interaction, as well as their synergistic effect to the whole electrochemical synthesis process. The results show that the electrosynthesis reaction process follows a quasi-first-order reaction kinetic characteristic. The apparent kinetic model of the electrosynthesis reaction was established, and kinetic parameters were calculated.

Key words: Apparent kinetics; Chromic acid; Electrosynthesis method; Kinetic model