文献类型：期刊文献

中文题名：活性炭电极数量对电容去离子系统脱盐性能的影响

英文题名：Effect of the Number of Activated Carbon Electrodes on the Desalination Performance of Capacitive Deionization

作者：檀畅[1] 李蓓[2] 呼生春[1] 王傲[1] 张燕萍[1] 孙康[1]

第一作者：檀畅

机构：[1]中国林业科学研究院林产化学工业研究所、江苏省生物质能源与材料重点实验室、国家林业和草原局林产化学工程重点实验室、林木生物质低碳高效利用国家工程研究中心、江苏省林业资源高效加工利用协同创新中心,江苏南京210042;[2]江苏省中国科学院植物研究所,江苏南京210014

年份：2023

卷号：43

期号：6

起止页码：17-24

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：江苏省生物质能源与材料重点实验室重大项目(JSBEM-S-202101);中国博士后科学基金资助项目(2021M691337)。

语种：中文

中文关键词：电容去离子;活性炭;苦咸水淡化;工业化放大

外文关键词：capacitive deionization;activated carbon;brackish water desalination;scale up

分类号：TQ35

摘要：在不使用离子交换膜的前提下,以活性炭为电极材料,通过构筑不同堆叠单元数量的电容去离子(CDI)系统,以12 mmol/L的NaCl溶液为模拟盐水,考察堆叠单元数量、进水流速对CDI系统产水规模、脱盐容量和能量效率等参数的影响。结果表明:流速4 mL/min下并联1、2、4对电极单元,CDI系统脱盐总量显著增加,分别为10.11、23.41和34.22 mg,且系统的平均脱盐浓度(ΔC)和热力学能量效率(ηTEE)随电极单元数量增加而显著增加,ΔC由2.16 mmol/L增加到7.31 mmol/L,ηTEE由0.66%增加到2.17%。在2对电极单元的CDI系统中,随着进水流速的增加,充电效率和脱盐容量(Q SAC)基本保持不变,系统的ΔC、ηTEE和产水能耗均显著降低。此外,当同比增加电极单元数量和进水流速时,1、2、4对电极单元的CDI系统的流速分别为4、8、16 mL/min,此时对应的脱盐总量分别为10.11、22.25和32.89 mg,且在80 W·h/m^(3)的产水能耗下,这3个CDI系统均能实现约2 mmol/L的平均脱盐浓度。因此,增加电极单元数量可以有效扩大CDI系统产水规模。
This study constructed capacitive deionization(CDI)systems with different numbers of stacked units,using activated carbon as electrode material without ion exchange membranes.The effects of the number of stacked units on freshwater productivity,salt adsorption capacity and energy efficiency of the CDI system were explored.The results show that CDI systems with 1,2,and 4 pairs of electrodes achieve the total salt removal quantity of 10.11,23.41,and 34.22 mg at the same flow rate,respectively.Furthermore,the average concentration reduction(ΔC)and the thermodynamic energy efficiency(ηTEE)of the CDI systems increase dramatically with the increase of the electrode units:ΔC increased from 2.16 mmol/L to 7.31 mmol/L,andηTEE increased from 0.66%to 2.17%.In the CDI system with two pairs of electrodes,the charge efficiency and the salt adsorption capacity(Q SAC)do not be affected by the flow rate,while theΔC,energy consumption,andηTEE of the system all significantly decrease with the increase of the flow rate.In addition,when simultaneously increasing the stacked units and flow rate with the same factor,the total salt removal quantity of the CDI system was 10.11,22.25 and 32.89 mg at the stacked units of 1,2,4,respectively.All of these three systems achieve the average desalination concentration of about 2 mmol/L.Therefore,increasing the number of stacked units can effectively expand the scale of CDI system.