Evaluation of Two Kurdistan-Iraq Crude Oil (T-21A, PF2) by Derivatographic Method
Sherwan Mohammad Simo *
Department of Chemistry, Faculty of Science, University of Zakho, Iraq.
Salah Aldin Naman
Department of Chemistry, Faculty of Science, University of Zakho, Iraq.
Kanaan Ramadan Ahmed
Department of Chemistry, Faculty of Science, University of Zakho, Iraq.
Akhmetov Arslan Faritovich
Department of Oil and Gas Technology, Ufa State Petroleum Technological University, Ufa, Russia.
*Author to whom correspondence should be addressed.
Abstract
Evaluation of crude oil and its residue using derivatography, is one of the most common physical and chemical methods analytical research. Crude oil residues 350+ obtain from two Iraq-Kurdistan crudes (Tawke T-21A well and Shekhan PF2 well) by using atmospheric distillation after removing all volatile fractions. The sample characterized by direvatographic method. The thermo analysis, reactions were carried out at temperature range 20- 700℃ for reaction time 68 min. These derivatograph curves show the weight change and heat energy (Enthalpy) change as the function of time and temperature. It shows that the crude oil residues have different composition. The curve which marks the weight changes of the sample heated is the thermogravimetric curve, TGA. Whereas the curve, which records heat energy or enthalpy changes during thermal decomposition is the DTA or differential thermoanalytic. By means of the derivatograph, it is possible to record simultaneously curve of weight change (TG), and enthalpy change (DTA) as a function of temperature. This method analysis shows good evaluation of these two crude oil well.
Keywords: Crude residue, DTA, derivatograph, DTG, petroleum residue, thermal analysis, TGA.