(中南大學(xué) 化學(xué)化工學(xué)院，長沙 410083)
摘 要:
采用自行研制開發(fā)的鋁酸鈉溶液電導(dǎo)在線跟蹤儀，在過飽和鋁酸鈉溶液均相成核過程中，在線檢測溫度為323、328和333 K，苛性比為1.337，苛性鈉初始濃度為50~
關(guān)鍵字: 鋁酸鈉溶液；均相成核；電導(dǎo)率儀；在線檢測
（College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:The homogeneous nucleation induction period of synthetic, optically clear caustic aluminate solution were investigated with the application of a self-made online conductivity analyzer. The experiments were performed at 323, 328 and 333 K and solution ratio of 1.337 with Na2Ok concentration in the range of 50−110 g/L. The results show that the nucleation kinetics are 6~8 orders dependence upon Al2O3 relative supersaturation and strong temperature effect, the critical interfacial energy is of 34−35 mJ/m2, the critical nucleus size is of 1.5−2.0 μm and the activation energy is of 50.2 kJ/mol. The mechanism of sodium aluminate solution nucleation is homogeneous and chemical reaction controlled.
Key words: sodium aluminate solution; homogeneous nucleation; conductivity analyzer; online detection
