双极膜电渗析硝酸钠溶液影响因素的研究  

Study on Influencing Factors of Bipolar Membrane Electrodialysis of Sodium Nitrate Solution

作　　者：李燃 孟响 汪润慈 袁中伟[1] Li Ran;Meng Xiang;Wang Runci;Yuan Zhongwei(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《广东化工》2024年第20期13-15,35,共4页Guangdong Chemical Industry

摘　　要：本研究建立了一种双极膜电渗析(BMED)工艺,将硝酸钠溶液转化为氢氧化钠和硝酸。在硝酸钠的初始量和通过膜堆的电量一致的条件下,研究了初始硝酸钠浓度、电流密度对BMED制备酸/碱工艺的影响。结果表明,初始硝酸钠浓度、电流密度对CE和EC的影响不大。最终建议初始硝酸钠浓度在0.5 mol·L^(-1)~1.0 mol·L^(-1),电流密度在40 mA·cm^(-2)~60 mA·cm^(-2)。将碱产品的浓度控制在1.0 mol·L^(-1)~2.0 mol·L^(-1),相应的CE为57%~74%,EC为3.8 kWh·kg^(-1)~4.5 kWh·kg^(-1)。In this study,a bipolar membrane electrodialysis(BMED)process was developed to convert sodium nitrate solution into sodium hydroxide and nitric acid.Under the condition that the initial amount of sodium nitrate and the amount of electricity passed by the membrane stack was consistent,effects of initial sodium nitrate concentration and current density on the acid/base preparation process of BMED were investigated.The results suggested that the initial sodium nitrate concentration and current density had little influence on CE and EC.Finally,it was suggested that the initial sodium nitrate concentration ranged from 0.5 mol·L^(-1)to 1.0 mol·L^(-1),and the current density ranged from 40 mA·cm^(-2)to 60 mA·cm^(-2).The concentration of base product should be controlled at 1.0 mol·L^(-1)~2.0 mol·L^(-1),the CE was 57%~74%and the EC was 3.8 kWh·kg^(-1)~4.5 kWh·kg^(-1),correspondingly.

关 键 词：双极膜电渗析 硝酸钠 氢氧化钠 硝酸 

分 类 号：TQ15[化学工程—电化学工业]