Browsing by Author "Goni, Mustapha Umar"

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    Solubility of light ends in heavy condensates
    (Heriot-Watt University, 2024-10) Goni, Mustapha Umar; Chapoy, Professor Antonin; Burgass, Doctor Rhoderick William; Ahmadi, Doctor Pezhman
    The research work aims to improve the prediction of the vapour-liquid distribution of light hydrocarbons in heavy raw condensate production streams by gathering and evaluating the available experimental data. The principal motivation of this research initiative was to generate a comprehensive data set to assist in the efficient and economic design and running of condensate stabilization facilities. Vapour liquid equilibrium (VLE) data for binary systems of light hydrocarbons (ethane, propane and n-butane) in heavier hydrocarbons were gathered from the literature. The gathered datasets were evaluated using predictive Peng Robinson (PPR78) and multifluid Helmholtz energy approximation (MFHEA) equations of state. Experiments were conducted to generate VLE data for binary and multicomponent systems of light and heavy gas condensate ends up to 373 K and 10 MPa using an isochoric setup. This effort yielded entirely new datasets for binary systems of ethane and propane in n-decane, n-undecane, n-dodecane and n-tridecane respectively. Six multicomponent systems composed of varying amounts of n-alkane components were synthesised as part of this study and their VLE properties (bubble point) determined. The new binary and multicomponent systems VLE data generated were correlated/predicted using the PPR78 EoS, MFHEA EoS and PC SAFT EoS with good agreement observed between the experimental data and model correlations/predictions. The gathered VLE data were used to fit the βT_ij and γT_ij parameters of the MFHEA EoS while keeping the βv_ij and γv_ij BIPs equal to unity. This formed the basis for the development of a model for predicting the βT_ij and γT_ij BIPs for the MFHEA EoS using group contribution (GC) method. The model covers systems composed of n – alkanes with future studies proposed to extend its application to components such as cycloalkanes, aromatics and non-hydrocarbon components such as CO2, H2S and N2.The GC model was validated using binary and multicomponent systems with good agreement between the experimental data and model predictions.