Measurement of mass diffusion coefficients of saccharose solution and dimethyl ether in air using digital image holographic interferometry system
Mao-Gang He, Qiu Zhong, Ying Zhang, Zhi-Gang Liu and Xinxin Zhang
An experimental system based on digital image holographic interferometry and a novel diffusion cell are designed and constructed for measuring mass diffusion coefficients. To verify the accuracy and reliability of the system, the mass diffusion coefficients of KCl in aqueous solution at temperatures of 291.8 K, 294.7 K, 298.8 K, 299.8 K, 305.4 K, 308.5 K and 315.2 K and at concentration 0.33 mol·L-1 were measured. The results show that the absolute average of relative deviations is 1.30% com-pared with the literature values. Then the mass diffusion coefficients of saccharose in aqueous solution at temperatures of 288.15 K, 298.15 K, 303.15 K, 313.15 K and 333.15 K and at concentration 0.1 mol·L-1 were measured. Furtherly, the mass diffusion coefficients of dimethyl ether (DME) in air at temperatures of 296.45 K, 300.45 K and 303.25 K were also measured.