Model-based measurement of diffusion using Raman spectroscopy

被引:58
作者
Bardow, A
Marquardt, W
Göke, V
Koss, HJ
Lucas, K
机构
[1] Rhein Westfal TH Aachen, Lehrstuhl Prozesstech, D-52064 Aachen, Germany
[2] Rhein Westfal TH Aachen, Lehrstuhl Tech Thermodynam, D-52056 Aachen, Germany
关键词
D O I
10.1002/aic.690490205
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The measurement of diffusion coefficients in multicomponent liquid mixtures is still an open question. A new technique aimed at overcoming this deficiency is presented. It is based on Raman spectroscopy, which has been extended to obtain liquid concentration data of all components in a mixture simultaneously with high temporal and spatial resolution. The following data analysis uses model-based methods. This provides a very flexible framework, allowing substantial reduction of experimental effort and time and the direct estimation of the diffusion coefficient as a function of concentration. Furthermore, the experimental procedure is improved using optimal experimental design techniques. This new methodology is validated for binary mixtures.
引用
收藏
页码:323 / 334
页数:12
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