Paper Information

Title: 

AN INVESTIGATION ABOUT OF ASPHALTENE ADSORPTION EXTRACTED FROM BRAZILIAN SOUTHERN OIL FIELDS ONTO DIFFERENT MINERALS SURFACES- COMPARATIVE STUDY OF LINEARIZED AND NON-LINEARIZED

Type: PAPER
Author(s): MOHAMMADI MAJID*
 
 *DEPARTMENT OF PETROLEUM ENGINEERING, AMIRKABIR UNIVERSITY (TEHRAN POLYTECHNIC), TEHRAN, IRAN
 
Name of Seminar: INTERNATIONAL CONFERENCE OIL, GAS, PETROCHEMICAL AND POWER PLANT
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVONI AMOZESHI PAZHOHESHI VESTA
Date:  2012Volume 1
 
 
Abstract: 

IN THIS PAPER, THE LANGMUIR ISOTHERM, ORIGINALLY DERIVED FOR THE ADSORPTION OF ASPHALTENE EXTRACTED FROM SHALE OIL AND DISSOLVED IN TOLUENE ON KAOLIN, SMECTITE, FLUORITE AND HEMATITE, WAS MODIFIED TO FIT THE ADSORPTION ISOTHERM. THE MODIFIED LANGMUIR ISOTHERM PARAMETERS OBTAINED FROM THE FOUR LINEAR EQUATIONS USING THE LINEAR METHOD DIFFERED. THE AIM OF THE PROPOSED MODIFICATION IS BASED ON THE FACT THAT DIRECT APPLICATION OF THE LANGMUIR ISOTHERM OFTEN LEADS TO POOR DATA FITTING. IN THE PRESENT COMMUNICATION, IT IS SHOWN THAT THE LEVEL OF DATA FITTING TO THE LANGMUIR ISOTHERM CAN BE IMPROVED BY A SIMPLE MODIFICATION THROUGH INTRODUCING A CONCENTRATION DEPENDENT FACTOR, X. THE PRESENT PAPER DISCUSSES FOUR MODIFIED LANGMUIR LINEARIZED ISOTHERM MODELS AND ONE NON-LINEAR ISOTHERM MODEL: THEIR COEFFICIENTS ARE ESTIMATED AND, FOR THE STUDY OF NON-LINEAR ISOTHERM MODEL, GENETIC ALGORITHM IS USED. A GENETIC ALGORITHM PROCEDURE WAS UTILIZED TO OPTIMIZE THE MODIFIED LANGMUIR CONSTANTS FOR A MORE ACCURATE ESTIMATION OF THE SET OF MODEL PARAMETERS. THE OBTAINED RESULTS DEMONSTRATED THAT THE BEST FIT WAS OBTAINED USING GENETIC ALGORITHM. FURTHERMORE, IT WAS FOUND OUT THAT FROM THE SURFACE MINERALS MENTIONED, HEMATITE MINERAL FOLLOWS A MULTILAYER ADSORPTION ISOTHERM.

 
Keyword(s): ASPHALTENE ADSORPTION, RESERVOIR ROCK MINERAL, MULTILAYER ADSORPTION, MODIFICATION OF LANGMUIR ISOTHERM
 
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