摘要
工作溶液的电导特性对盐差能驱动的逆电渗析电池堆性能影响显著。建立电导率测试装置,在变溶液浓度和温度条件下,测试了KAc-AgAc-H_(2)O、LiAc-AgAc-H_(2)O、NaAc-AgAc-H_(2)O和NaAc-SDBS-H_(2)O四组三元溶液体系的电导率。结果显示:在10~60℃内,乙酸盐溶液电导率均随溶液浓度和温度的增加而增加,平均提升率近20%/10℃;而在相同溶液浓度和温度下,电导率排序由大至小为κ(KAc-AgAc-H_(2)O)>κ(NaAc-AgAc-H_(2)O)>κ(LiAc-AgAc-H_(2)O);实验发现当乙酸纳水溶液中4%的溶质被SDBS替换,则溶液体系的电导率能被有效提升,但添加同样质量分数的AgAc,却未能促成电导率的增大。最后利用高斯振幅方程关联所测乙酸盐溶液体系的电导率。
The performance of a reverse electrodialysis cell driven by the salinity gradient energy is significantly influenced by the electrical conductivity characteristic.of the working solution.An electrical conductivity measurement system was built.And the electrical conductivities of KAc-AgAc-H_(2)O、LiAc-AgAc-H_(2)O、NaAc-AgAc-H_(2)O and NaAc-SDBS-H_(2)O solutions were measured under varying solution concentration and temperature conditions.The results demonstrate that electrical conductivities of these four ternary solutions are elevated with the increase of either the solution concentration or temperature within the temperature range of 10 to 60℃.And the average increase rate is approximately 20%/10℃.Electrical conductivity is observed to be decreased in the order:κ(KAc-AgAc-H_(2)O)>κ(NaAc-AgAc-H_(2)O)>κ(LiAc-AgAc-H_(2)O)at the same solution concentration and temperature conditions.It is also found that electrical conductivity of the aqueous potassium sodium solution is significantly increased if a mass fraction of solute(4%)is substituted by SDBS.However,it makes little electrical conductivity variation if adding the same fraction of silver acetate.Finally,the Gaussian amplitude equation was applied appropriately to correlate the measured electrical conductivitydata.
作者
吴曦
唐峰毅
徐士鸣
张鑫杰
杨帅帅
龚路远
WU Xi;TANG Fengyi;XU Shiming;ZHANG Xinjie;YANG Shuaishuai;GONG Luyuan(Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian University of Technology,Dalian 116024,China;School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2023年第5期453-459,共7页
Journal of Thermal Science and Technology
基金
国家自然科学基金资助项目(52076026,51606024)
中央高校基本科研业务费资助项目(DUT22JC25)。
关键词
电导率
溶液
乙酸盐
钾
钠
银离子
electrical conductivity
solution
acetate
potassium
sodium
silver ion
作者简介
吴曦,男,1986年生,辽宁大连人,博士,副教授,主要研究方向为中低温热能转换利用。E-mail:xiwudlut.edu.cn。
