International journal of

ADVANCED AND APPLIED SCIENCES

EISSN: 2313-3724, Print ISSN:2313-626X

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 Volume 6, Issue 1 (January 2019), Pages: 90-94

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 Original Research Paper

 Title: Calculation of wax appearance temperature directly from hydrocarbon compositions of crude oil

 Author(s): Arya Hosseinipour 1, *, Azuraien Bt Japper-Jaafar 2, Suzana Yusup 3

 Affiliation(s):

 1Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Perak Darul Ridzuan, Malaysia
 2Centre for Advanced and Professional Education, Universiti Teknologi PETRONAS, Level 16, Menara 2, Menara Kembar Bank Rakyat, Jalan Travers, 50470 Kuala Lumpur, Malaysia
 3Biomass Processing Laboratory, Centre for Biofuel and Biochemical Research, Institute of Sustainable Living, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia

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 * Corresponding Author. 

  Corresponding author's ORCID profile: https://orcid.org/0000-0003-4551-2213

 Digital Object Identifier: 

 https://doi.org/10.21833/ijaas.2019.01.012

 Abstract:

The purpose of this research is to develop a correlation in order to calculate the wax appearance temperature directly from hydrocarbon compositions of crude oil. Different methods have been used to measure wax appearance temperature including experimental instruments and thermodynamic models. A lot of empirical correlations have been used to calculate the physical properties of crude oil. However, there are no correlations for calculating the wax appearance temperature of the crude oils based on hydrocarbon compositions of crude oil. Calculation of the wax appearance temperature has become crucial in the study of wax crystallisation to prevent any congealing of the crude oil in production facilities and transportation pipelines. In this study, new correlations based on the hydrocarbon compositions of crude oil are developed to calculate the wax appearance temperature. The DataFit® scientific software’s multiple nonlinear regression analysis tools are used as a platform to develop a novel correlation to calculate the wax appearance temperature. Two correlations are developed. The accuracy and reliability of these correlations were verified experimentally and thermodynamically by different thermodynamic models. The R2 and AAD% for these correlations (Eqs. 4 and 5) are 0.973, 0.999, 0.0170 and 0.00028 respectively. It can be concluded that the correlation equations are acting better than the thermodynamic wax model in predicting the wax appearance temperature of the crude oils. However, this correlation does not have the capability of thermodynamic wax models in prediction of the phase equilibriums at any temperatures and pressures and are subject to availability of the hydrocarbon composition range as indicated. 

 © 2018 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

 Keywords: Alkanes, Branched alkanes, Cyclic alkanes, Wax appearance temperature, Wax crystallisation

 Article History: Received 31 August 2018, Received in revised form 29 November 2018, Accepted 3 December 2018

 Acknowledgement:

The authors wish to thank Universiti Teknologi PETRONAS (UTP), for providing financial support in this study.

 Compliance with ethical standards

 Conflict of interest:  The authors declare that they have no conflict of interest.

 Citation:

 Hosseinipour A, Japper-Jaafar AB, and Yusup S (2019). Calculation of wax appearance temperature directly from hydrocarbon compositions of crude oil. International Journal of Advanced and Applied Sciences, 6(1): 90-94

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 Figures

 Fig. 1 Fig. 2 Fig. 3 Fig. 4

 Tables

 Table 1 Table 2 Table 3 

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