多不饱和脂肪酸酯分离纯化研究-1:物性模型研究与建立

利用分子模拟技术(GAUSS)和类导体屏蔽片段活度系数模型(COSMO-SAC)相结合的方法,研究了多不饱和脂肪酸酯体系纯组分的热力学性质和传递性质。通过数值计算方法,将物性数据进行回归,分别得到了饱和蒸气压Anton-Riedel拓展方程模型log P=A+B/(T)+C×T+D×ln(T)、液相黏度Andrade扩展方程模型logη=A+B/(T)+C×ln(T)和液相密度Rackett方程模型ln(1/ρ)=ln(B/A)+(1-T/C)D×ln(B)。

Transfer Characteristics in Mechanically Stirred Airlift Loop Reactors with or without Static Mixers

The mechanically stirred internal loop airlift reactors equipped with or without static mixers are devised for intensification of gas-liquid mass transfer rate. The influences of superficial gas velocity, agitation or static mixers on gas hold-up, mixing time, liquid circulating velocity and volumetric mass transfer coefficient have been investigated with tap water and carboxymethyl cellulose (CMC) aqueous solution. The experimental results indicate that mechanical agitation is more efficacious than static mixer in highly viscous media for improving mass transfer in airlift reactors. The empirical correlation of volumetric mass transfer coefficient with apparent viscosity, and energy consumption for mechanical agitation and aeration is developed.