Prediction of the infinite-dilution partial molar volumes of organic solutes in supercritical carbon dioxide using the Kirkwood-Buff fluctuation integral with the hard sphere expansion (HSE) theory

Kwon, Yong Jung; Lee, Won Gyu

doi:10.1007/bf02719425

Cited by 1 publication

(1 citation statement)

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“…Consequently, the mathematical definition of the CED, viz the ratio of the molar energy of vaporization divided by the molar liquid volume leads to a strong link with the thermal activation theory for viscous flow in light of the heat of vaporization specification. Moreover, in light of solution thermodynamics, the molar volume of a pure component is different from that of the mixture by virtue of the concept of partial thermodynamic properties (Kwon & Lee, 2005;Bamzad et al, 2022), and the individual contribution to the CED considering intermolecular forces, namely hydrogen bonding, van der Waals interaction and electrostatic interaction (Shimiz et al, 2010). Consequently, the heat of vaporization related to hole formation in the thermally activated viscous flow theory as well as the activation energy for viscous low will change upon heavy crude oil dilution for pipeline transport.…”

Section: Activation Energy Change Of Heavy Crude Oil By Dilutionmentioning

confidence: 99%

Study of Activation Energy for Viscous Flow of Mixtures as a Measure of Dilution Efficiency for Heavy Oil-Diluent Systems

Miadonye,

Amadu,

Kumari

et al. 2024

IJC

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As the demand for crude oil continues to increase in response to the continued global needs for it, the development of unconventional crude oil reserves is the only way to sustain global supply. However, the excessively higher viscosity of heavy crude oil makes it less attractive for conventional pipeline transportation. Therefore, reducing the viscosity of heavy crude oil to meet crude oil transporting pipeline regulations is a necessity. This paper has assessed the dilution efficiency of well-known diluents in the petroleum industry, using different dilution ratios based on a thermodynamic approach involving activation energy and heat of vaporization determination. Based on selected dilution ratios, kinematic viscosities of binary and ternary systems of toluene and natural gas condensate as diluents, and Saudi Heavy crude oil as the base oil were measured, using anticipated field based temperatures reported in the literature, which facilitated the experimental approach. The study shows that although the ternary systems have the lowest activation energy for viscous flow and heat of vaporization in accordance with the thermal activation theory of viscous flow, natural gas condensate binary systems have the lowest cost of transportation per barrel of total fluid in the transporting pipeline. The study further shows that the binary systems for toluene and Saudi Heavy crude oil have higher activation energy for viscous flowed compared to the toluene systems.

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Section: Activation Energy Change Of Heavy Crude Oil By Dilutionmentioning

confidence: 99%