无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (7): 44-49.doi: 10.19964/j.issn.1006-4990.2024-0308

• 研究与开发 • 上一篇    下一篇

电解亚氯酸钠制备二氧化氯的催化反应动力学研究

吴明松(), 邹志刚, 王鹤, 陈瑜, 郑家星   

  1. 东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2024-05-30 出版日期:2025-07-10 发布日期:2024-08-28
  • 作者简介:吴明松(1982— ),男,博士,副教授,研究方向为饮用水安全保障技术、二氧化氯制备及应用;E-mail:wumingsong@163.com
  • 基金资助:
    安徽省教育厅重大项目(2024AH040184);石家庄市驻冀高校产学研合作项目(241200074A)

Study on catalytic reaction kinetics for preparation of chlorine dioxide from electrolyzed sodium chlorite

WU Mingsong(), ZOU Zhigang, WANG He, CHEN Yu, ZHENG Jiaxing   

  1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Received:2024-05-30 Published:2025-07-10 Online:2024-08-28

摘要:

为了开发一种安全、高效、便捷的高纯ClO2制备新方法,系统考察了双室电解池中不同催化剂对电解NaClO2制备ClO2的影响因素及反应动力学规律,并对长期运行下电极的腐蚀情况进行了表征。结果表明,在双室电解池中电解NaClO2可以制得高纯度ClO2。最佳反应条件:NaClO2浓度为0.6 mol/L、NaCl浓度为0.2 mol/L、电流为3 A、反应时间为30 min,此时ClO2收率和纯度分别可达51.2%和95.1%。反应过程为零级反应,k=13.62 mol/(L·min)。MnO2催化效果较好,最佳的物质的量比n(MnO2)/n(NaClO2)=0.10,此时ClO2收率和纯度分别可达66.1%和98.1%;催化反应过程依然为零级反应。MnSO4对制备ClO2有一定催化作用,但浓度过高会堵塞质子膜降低其收率,MnSO4的最佳投加浓度为0.05 mol/L,此时ClO2收率和纯度分别可达56.4%和96.7%。NiSO4、CoSO4会堵塞质子交换膜影响质子迁移效率,从而抑制ClO2生成。XRD、SEM和EDS表征结果表明,长期运行的电极表面会生成TiCl2,但所用的钛基钌铱合金电极并未明显腐蚀,可以长期使用,其结果对开发ClO2新的制备方法提供了理论依据。

关键词: 消毒, 二氧化氯, 亚氯酸钠, 电解, 反应动力学

Abstract:

In order to develop a safe,efficient and convenient method for the preparation of high-purity ClO2,the factors influencing the preparation of ClO2 from electrolysis of NaClO2 by examining the influence of different catalysts in a double-compartment electrolytic cell were systematically investigated and the law of reaction kinetics,and the corrosion of the electrodes under long-term operation was characterized.The results showed that high-purity ClO2 could be prepared by electrolyzing NaClO2 in a double chamber electrolytic cell.The optimal reaction conditions were NaClO2 concentration of 0.6 mol/L,NaCl concentration of 0.2 mol/L,current of 3 A,and reaction time of 30 min,at which the ClO2 yield and purity could reach 51.2% and 95.1%,respectively.The reaction process was a zero-stage reaction,k=13.62 mol/(L·min).MnO2 showed better performace,the best substance ratio n(MnO2)/n(NaClO2)=0.10,the yield and purity of ClO2 could reach 66.1% and 98.1%,respectively.The catalytic reaction process was still a zero-stage reaction.MnSO4 had certain catalytic effect on the preparation of ClO2,the concentration was too high and block the proton membrane to reduce its yield,the optimal concentration of MnSO4 was 0.05 mol/L,the yield and purity of ClO2 could be up to 56.4% and 96.7%,respectively.NiSO4,CoSO4 blocked the proton exchange membrane to affect the efficiency of proton migration,which inhibited the generation of ClO2.The characterization results of XRD,SEM and EDS showed that TiCl2 was generated on the surface of the electrode for a long period of time,but the titanium-based ruthenium-iridium alloy electrode used did not corrode significantly,and it could be used for a long period of time,and the results provided a theoretical basis for the development of a new method of preparation of ClO2.

Key words: disinfection, chlorine dioxide, sodium chlorite, electrolysis, reaction kinetics

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