Exploration and optimization of extraction process of bromine from underground brine by electrooxidation

被引：0
|
作者：
Zhang X. [1 ,2 ,3 ]
Ji Z. [1 ,2 ,3 ]
Wang J. [1 ,2 ,3 ]
Guo X. [1 ,2 ,3 ]
Liu J. [1 ,2 ,3 ]
Zhao Y. [1 ,2 ,3 ]
Yuan J. [1 ,2 ,3 ]
机构：
[1] National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
[2] Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
[3] Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 04期
关键词：
Bromine extraction; Electrochemistry; Graphite electrode; Oxidation; Reaction kinetics; Underground brine;
D O I：
10.11949/0438-1157.20201243
中图分类号：
学科分类号：
摘要：
By designing an electrolytic cell containing a three-electrode system and strictly controlling the potential of the working electrode, an electro-oxidation method is proposed for the selective extraction of bromine resources in underground brine. The technical feasibility, the reaction kinetic model, the influence of co-existing Cl- and the initial pH of the anolyte, and the optimal operating time has been discussed respectively. The results showed that the electro-oxidation was technically feasible for extracting bromine from underground brine, and the reaction of electro-oxidation for extracting bromine from underground brine followed the second-order reaction kinetic model. The bromide reaction rate constant increased first and then decreased with the increase of chloride concentration. The co-existing chloride had both promoting and inhibititing effects on the electro-oxidation of bromide. The promotion effect might result from the increase of total solution conductivity caused by the increase of chloride concentration. The inhibitition effect might be due to the adsorption competition between chloride and bromide on the graphite electrode surface. The energy consumption deceased with the increase of chloride concentration, and the current efficiency was changed little with the change of chloride concentration. In addition, the bromide reaction rate constant gradually increased as the initial pH of the anolyte decreased, and current efficiency and energy consumption were relatively unaffected by it. In the process of extracting bromine from underground brine by electro-oxidation, the extraction ratio of Br2 grew more and more slowly with the time prolong, the current efficiency continued to decrease, and the energy consumption continued to rise and its growth rate was also increasing. Therefore, the optimal operating time might be 6-10 h. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：2123 / 2131
页数：8
相关论文
共 31 条
  • [1] Zhang H F, Wang G Q, Cai R H, Et al., Progress in bromine extracting technology, Chemical Industry and Engineering, 27, 5, pp. 450-456, (2010)
  • [2] Chen X F, Cao C Y., Current status and prospect forecast of Chinese industrial bromine, Chemical Technology Market, 33, 7, pp. 5-8, (2010)
  • [3] Chai Z H, Li M M., Domestic manufacturing process and expectation of bromine industry, Journal of Salt Science and Chemical Industry, 47, 6, pp. 1-4, (2018)
  • [4] Chen X N, Wang H Z., Bromine resource and analysis of the industry development, Journal of Salt and Chemical Industry, 42, 6, pp. 4-7, (2013)
  • [5] Huang X P., Multipurpose utilization of bittern resource in salt lake, Ocean Technology, 21, 4, pp. 66-72, (2002)
  • [6] Han J B, Xu J X, An Z, Et al., Research advance of the salt lake underground brine extraction technology, Journal of Salt Lake Research, 23, 1, pp. 67-72, (2015)
  • [7] Li H M, Cheng H D, Zhang Q Y., Evaluation of the technologies of comprehensive utilization and exploitation salt resource, Journal of Salt Lake Research, 11, 3, pp. 51-64, (2003)
  • [8] Li H M, Cheng H D, Zhang Q Y., Evaluation of the technologies of comprehensive utilizationand exploitation brine resources, Journal of Salt Lake Research, 12, 1, pp. 62-72, (2004)
  • [9] Zhang L N, Liu Y Z, Jiao W Z, Et al., Development and research status of bromine extracting technology from the brine, Journal of Salt Lake Research, 17, 1, pp. 68-72, (2009)
  • [10] Zhan J X., Discussion on bromine recovery process for Weiyuan gas field formation water, Chemical Engineering of Oil and Gas, 25, 4, pp. 239-242, (1996)
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