A CORRELATION EQUATION FOR LIQUID DIFFUSION COEFFICIENT WITH CONCENTRATION

• 作 者: 张建侯 袁继堂
• 机 构: Department of Chemical Engineering Tianjin University,Department of Chemical Engineering Tianjin Un
• 出 处: Journal of Chemical Industry and Engineering
• 发表日期: 1987年01期
• 关键词: deviation absolute correlate derivation viscosity instead summarized dimensions

Based on absolute-rate theory, a new equation has been derived to correlate the binary liquid diffusion coefficient with concentration:D_(AB)=C_VC_η(D_(BA)~0)φ_A(D_(AB)~0)φ_Bβwhere C_V=(V_A~(φ_A)V_B~(φ_B)/V)~(1/3), C_η=(η_A~(φ_A)η_B~(φ_B)/η). It has been applied to 16 systems with 176 experimental points. The grand average percent deviation in comparison with those obtained by using three other equations is as followsThe results of calculation show that the present equation proposed has higher generaliity and better applicability.

Based on absolute-rate theory, a new equation has been derived to correlate the binary liquid diffusion coefficient with concentration: D AB = C_VC_η D_AB ~ 0 φ_A D_AB ~ 0 φ_Bβwhere C_V = V_A ~ (φ_A) V_B ~ (φ_B) / V) ~ (1/3), C_η = (η_A ~ (φ_A) η_B ~ (φ_B) / η). It has been applied to 16 systems with 176 experimental points. grand average percent deviation in comparison with those obtained obtained using three other equations is as follows that results of calculating show that the present equation proposed has higher generality and better applicability.