Binary diffusion coefficients of acetone in carbon dioxide at 308.2 and 313.2 K in the pressure range from 7.9 to 40 MPa
Binary diffusion coefficients of acetone in carbon dioxide at 308.2 and 313.2 K in the pressure range from 7.9 to 40 MPa
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DOI：
10.1023/a:1006637401868
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发表时间：
2000-05-01
影响因子：
2.2
通讯作者：
Kagei, S
中科院分区：
文献类型：
--
作者：
Funazukuri, T;Kong, CY;Kagei, S
用泰勒弥散法测定了丙酮在二氧化碳中的二元扩散系数，温度分别为308.2 K和7.90~40 Mpa，以及313.2 K和8.0Mpa~37 Mpa。用时间域拟合法得到的响应曲线的D-12值比用矩方法得到的D-12值更准确。当压力在308.2 K时低于8.3兆帕或在313.2 K时低于9.1兆帕时，通过检查(峰面积)x u(a，cal)、S-10的值、拟合误差epsilon和u(a，cal)/u(a，exp)作为压力的函数，发现D-12值的精度随着压力的降低而显著降低。在308.2 K和313.2 K压力分别高于8.3兆帕和9.1兆帕时，D-12值与施密特数关联式符合得很好。拟合误差较大的D-12数据(epsilon>；0.01)与该关联式预测值的偏差较大。
Binary diffusion coefficients of acetone in carbon dioxide were measured by the Taylor dispersion method at 308.2 K and 7.9 to 40 MPa and at 313.2 K and 8.0 to 37 MPa. The D-12 values obtained From the response curves by the method of fitting in the time domain were more accurate than those obtained by the moment method. At pressures lower than about 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K, the accuracy in the D-12 values was Found to decrease significantly with decreasing pressure by examining (peak area) x u(a,cal), the values of S-10, the fitting error epsilon, and u(a,cal)/u(a,exp) as a function of pressure. The D-12 values at pressures higher than 8.3 MPa at 308.2 K or 9.1 MPa at 313.2 K were well represented with the Schmidt number correlation. The D-12 data with larger fitting errors (epsilon > 0.01) showed larger deviations from the values predicted by this correlation.