(1. 中南大學(xué) 能源科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
2. 中南大學(xué) 信息科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
3. 湖南第一師范學(xué)院 信息科學(xué)與工程系，長(zhǎng)沙 410205)
摘 要: 應(yīng)用Bromley模型，通過(guò)對(duì)氫氧化鈉、鋁酸鈉和碳酸鈉等溶液體系活度因子的實(shí)驗(yàn)數(shù)據(jù)進(jìn)行校驗(yàn)與回歸分析，獲得了各電解質(zhì)合理的Bromley參數(shù)，建立基于Bromley模型的NaOH-NaAl(OH)4-Na2CO3-H2O體系活度因子的計(jì)算模型，其適用范圍為：質(zhì)量摩爾濃度分別為m(NaOH)≤8 mol/kg，m(NaAl(OH)4)≤3 mol/kg，m(Na2CO3)≤3 mol/kg且離子強(qiáng)度I≤9 mol/kg。使用該模型和Rard方法計(jì)算所得水的活度比較結(jié)果表明：該模型正確有效，計(jì)算精度較高，各電解質(zhì)的Bromley參數(shù)取值合理；該模型也可用于NaOH-NaAl(OH)4-H2O體系活度因子的計(jì)算。
關(guān)鍵字: 鋁酸鈉溶液；Bromley模型；活度因子
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. School of Information Science and Engineering, Central South University, Changsha 410083, China;
3. Deportment of Information Science and Engineering, Hunan First Normal University, Changsha 410205, China）
Abstract:According to Bromley model, the reasonable Bromley parameters for NaOH, NaAl(OH)4 and Na2CO3 were obtained by calibration regression on their experimental activity coefficients. The activity coefficient calculation model for NaOH-NaAl(OH)4-Na2CO3-H2O system was established based on Bromley model and the molatlity in the molal scale is that m(NaOH)≤8 mol/kg, m(NaAl(OH)4)≤3 mol/kg, m(Na2CO3)≤3 mol/kg, respectively, and ionic strength I≤9 mol/kg. The comparison of the activities of water calculated by the presented model with that of Rard’s method shows that the presented model is reliable and accurate and the values of the parameters for the three electrolytes are appropriate. Furthermore, the presented model can also be applied in the activity coefficient calculation for NaOH-NaAl(OH)4-H2O system.
Key words: sodium aluminate solution; Bromley model; activity coefficient
