European Journal of Chemistry 2011, 2(4), 485-488. doi:10.5155/eurjchem.2.4.485-488.450

Accurate improvement of a mathematical correlation for estimating diffusion coefficient in gaseous hydrocarbons


Mohammad Mohsen Sarafraz (1,*) , Mohammad Jamshidnejad (2) , Ahmad Arabi Shamsabadi (3) , Saeed Laki (4) , Hadi Ajami (5)

(1) Chemical Engineering Department, Islamic Azad University, Mahshahr-63519, Iran
(2) Chemical Engineering Department, Islamic Azad University, Mahshahr-63519, Iran
(3) Gas Engineering Department, Petroleum University of Technology, Ahwaz-63431, Iran
(4) Chemical Engineering Department, Amir Kabir University, Mahshahr-63516, Iran
(5) Gas Engineering Department, Petroleum University of Technology, Ahwaz-63431, Iran
(*) Corresponding Author

Received: 30 Apr 2011, Accepted: 21 Jun 2011, Published: 01 Dec 2011

Abstract


Accuracy of Riazi-Whitson mathematical correlation for estimating the molecular diffusion coefficient in gaseous hydrocarbons has been improved, which decreases the absolute average deviation related to the experimental data using About 486 experimental data points that have been collected from latest existing researches. Likewise, re-optimizing, and statistical calculations have been done to synchronize data to avoid unexpected deviations. As shown in present work, deviation values for results of improved correlation from experimental data are less in compare to Riazi-Whitson original correlation. The absolute average deviations for obtained values of improved correlation are about 9.71%, which is about 14% for original mentioned correlation. The input parameters are molecular weight, critical properties, and acentric factors of components in the system; mixture molar density; low-pressure gas viscosity and actual viscosity. The last three properties are calculable by proper correlations in chemical handbooks.

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Keywords


Mathematical correlation; Diffusion coefficient; Gaseous hydrocarbons; Experimental data; Optimized correlation; Riazi-Whitson correlation

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DOI: 10.5155/eurjchem.2.4.485-488.450

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How to cite


Sarafraz, M.; Jamshidnejad, M.; Shamsabadi, A.; Laki, S.; Ajami, H. Eur. J. Chem. 2011, 2(4), 485-488. doi:10.5155/eurjchem.2.4.485-488.450
Sarafraz, M.; Jamshidnejad, M.; Shamsabadi, A.; Laki, S.; Ajami, H. Accurate improvement of a mathematical correlation for estimating diffusion coefficient in gaseous hydrocarbons. Eur. J. Chem. 2011, 2(4), 485-488. doi:10.5155/eurjchem.2.4.485-488.450
Sarafraz, M., Jamshidnejad, M., Shamsabadi, A., Laki, S., & Ajami, H. (2011). Accurate improvement of a mathematical correlation for estimating diffusion coefficient in gaseous hydrocarbons. European Journal of Chemistry, 2(4), 485-488. doi:10.5155/eurjchem.2.4.485-488.450
Sarafraz, Mohammad, Mohammad Jamshidnejad, Ahmad Arabi Shamsabadi, Saeed Laki, & Hadi Ajami. "Accurate improvement of a mathematical correlation for estimating diffusion coefficient in gaseous hydrocarbons." European Journal of Chemistry [Online], 2.4 (2011): 485-488. Web. 16 Sep. 2019
Sarafraz, Mohammad, Jamshidnejad, Mohammad, Shamsabadi, Ahmad, Laki, Saeed, AND Ajami, Hadi. "Accurate improvement of a mathematical correlation for estimating diffusion coefficient in gaseous hydrocarbons" European Journal of Chemistry [Online], Volume 2 Number 4 (1 December 2011)

DOI Link: https://doi.org/10.5155/eurjchem.2.4.485-488.450

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