naa a22 4500 510821405 CHVBK 20180411083534.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11814-012-0144-7 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0144-7 Inhibition effect of CO2 on asphaltene precipitation for an Iranian crude oil and comparison with N2 and CH4 [Elektronische Daten] [Mohsen Mohammadi, Mahdi Akbari, Alireza Bahramian, Mahdi Naeeni, Zahra Fakhroueian] The effects of N2, CH4 and CO2 injection on asphaltene precipitation have been experimentally investigated using a reservoir oil fluid from south of Iran, making use of light transmission method. The results are compared and the effects of injected gases on reducing asphaltene colloidal stability in oil are found in the following order: CH4> N2>CO2. It is observed that CO2 can act like an inhibitor and can increase the solubility of asphaltene, decreasing the asphaltene precipitation onset. A thermodynamic discussion explains the effect of CO2 on the solubility of asphaltene based on the solubility parameters of recombined oil and CO2, calculated from Peng-Robinson equation of state along with an empirical correlation for volumetric properties of CO2. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Asphaltene nationallicence Asphaltene Precipitation Onset nationallicence Light Transmission Method nationallicence Gas Injection nationallicence Solubility Parameter nationallicence Mohammadi Mohsen School of Chemical Engineering, University of Tehran, Tehran, Iran aut Akbari Mahdi School of Chemical Engineering, University of Tehran, Tehran, Iran aut Bahramian Alireza School of Chemical Engineering, University of Tehran, Tehran, Iran aut Naeeni Mahdi Institute of Petroleum Engineering, University of Tehran, P. O. Box 11155-4563, Tehran, Iran aut Fakhroueian Zahra Institute of Petroleum Engineering, University of Tehran, P. O. Box 11155-4563, Tehran, Iran aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 429-433 0256-1115 30:2<429 2013 30 11814 https://doi.org/10.1007/s11814-012-0144-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0144-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohammadi Mohsen School of Chemical Engineering, University of Tehran, Tehran, Iran aut NATIONALLICENCE 700 1- Akbari Mahdi School of Chemical Engineering, University of Tehran, Tehran, Iran aut NATIONALLICENCE 700 1- Bahramian Alireza School of Chemical Engineering, University of Tehran, Tehran, Iran aut NATIONALLICENCE 700 1- Naeeni Mahdi Institute of Petroleum Engineering, University of Tehran, P. O. Box 11155-4563, Tehran, Iran aut NATIONALLICENCE 700 1- Fakhroueian Zahra Institute of Petroleum Engineering, University of Tehran, P. O. Box 11155-4563, Tehran, Iran aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/2(2013-02-01), 429-433 0256-1115 30:2<429 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer