Measurements of Binary Diffusion Coefficients for Ferrocene and 1,1′-Dimethylferrocene in Supercritical Carbon Dioxide
Measurements of Binary Diffusion Coefficients for Ferrocene and 1,1′-Dimethylferrocene in Supercritical Carbon Dioxide
复制标题
超临界二氧化碳中二茂铁和 1,1-二甲基二茂铁二元扩散系数的测量
DOI：
10.1021/je901096d
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
S. Kagei
中科院分区：
文献类型：
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作者：
C. Y. Kong;M. Nakamura;K. Sone;T. Funazukuri;S. Kagei
用色谱脉冲响应（CIR）法测定了二茂铁和1，1 ′-二甲基二茂铁在超临界二氧化碳（SC）中无限稀释时的二元扩散系数D_（12）和保留因子k（308.2 ~ 323.2）K，压力范围为（8.0 ~ 40.3）MPa和（8.2 ~ 40.1）MPa。还通过泰勒分散法测量了二茂铁的D12数据，其中采用了两种二茂铁注射程序：二茂铁溶解在scCO 2和液体己烷中。二茂铁的D_（12）值不受进样方法的影响，与CIR法测得的D_（12）值一致。正如在我们以前的报告中所测量的各种有机化合物一样，两种金属络合物的D12数据与流体动力学方程D12/T = αηβ相关，其中η是CO2粘度，α和β是由每种溶质确定的常数。保留因子也与CO2浓度相关。
Binary diffusion coefficients D12 and retention factors k of ferrocene and 1,1′-dimethylferrocene at infinite dilution in supercritical (sc) carbon dioxide were measured by the chromatographic impulse response (CIR) method at temperatures from (308.2 to 323.2) K over a pressure range from (8.0 to 40.3) MPa for ferrocene and from (8.2 to 40.1) MPa for 1,1′-dimethylferrocene. The D12 data for ferrocene were also measured by the Taylor dispersion method with two injection procedures of ferrocene: ferrocene dissolved both in sc CO2 and in liquid hexane. The D12 values of ferrocene were not affected by the injection methods and agreed with those measured by the CIR method. As has been seen for various organic compounds measured in our previous reports, the D12 data for both metal complexes were correlated with the hydrodynamic equation D12/T = αηβ, where η is the CO2 viscosity and α and β are the constants determined by each solute. The retention factors were also correlated with CO2 density.