摘要
为优化双极膜电渗析法分解硫酸铵制氨和硫酸的工艺参数,采用实验室双极膜电渗析装置,考察了通电方式、硫酸铵原液浓度和电流密度对硫酸铵分解效果的影响。实验结果表明:通电时用恒定电流的方式,总体上硫酸铵分解率和能耗均较恒定电压的要高。随着硫酸铵原液浓度增大,其分解率降低但能耗也减少。当电流密度增大时,硫酸铵分解能耗增大,分解率先随之明显提高,电流密度超过15.8mA/cm2后,硫酸铵分解率增幅趋于稳定。对硫酸铵质量分数为10%的原液,采用恒定电流的通电方式,在电流密度为15.8mA/cm2的条件下,硫酸铵的分解效果较好,分解率可达92.03%,能耗较低,约为0.208kWh/kg。
In order to optimize the process parameters of decomposing ammonium sulfate to produce ammonia and sulfuric acid by bipolar membrane eleetrodialysis, the effects of energized mode,feed concentration of ammonium sulfate and current density on the results of electrodialysis were studied by using laboratory bipolar membrane device. The results show that the decomposition rate of ammonium sulfate and energy consumption for constant current mode are higher than that for constant voltage mode. As the feed concentration of ammonium sulfate increases, the decomposition rate of ammonium sulfate decreases and so does the energy consumption. With the increase of current density, the decomposition rate of ammonium sulfate increases before being stabilized beyond a current density of 15.8 mA/cm^2. For ammonium sulfate solution of 10% concentration, decomposing effect of ammonium sulfate is better when using constant current mode at a current density of 15.8 mA/cm^2 , with a higher decomposition rate of 92.03% and a lower energy consumption of 0. 208 kWh/kg.
出处
《化工矿物与加工》
CAS
北大核心
2015年第11期24-27,共4页
Industrial Minerals & Processing
基金
国家自然科学基金面上项目(51374156)
关键词
硫酸铵
双极膜
电渗析
分解率
能耗
ammonium sulfate
bipolar membrane
electrodialysis
decomposition rate
energy consumption
