Combustion reaction kinetics studies of Turkish crude oils

2004-09-01
Bagci Suat, S.
Kök, Mustafa Verşan
In this research, sixteen experiments were conducted to study the combustion reaction kinetics of Turkish crude oils (Bati Raman, Camurlu, Raman, Adlyaman, Garzan, Karakus and Beykan) in a limestone medium. A mixture of the limestone and the crude oil was subjected to a controlled heating program under a constant flow rate of air. The produced gas was analyzed for its oxygen and carbon oxides contents. Although the molar CO2/CO ratios vary during low-temperature oxidation (LTO), for fuel deposition (FD) and high-temperature oxidation (HTO), these values can be indicated at different temperatures. A decrease in the atomic H/C ratio with an increase in temperature was observed for all runs. The activation energies of the Camurlu, Bati Raman, and Raman crude oils for both fuel deposition and high-temperature oxidation reactions were observed to be similar. For medium-gravity oils (Adlyaman and Garzan), the activation energies for the high-temperature oxidation reaction is higher than that for the fuel deposition reaction. For the LTO reaction, the activation energies are almost twice those of FD and HTO reactions for each crude oil. The activation energies are almost independent of the gravity of the oil used. The Arrhenius constant is not affected by the API gravity of the oils.
Energy and Fuels

Suggestions

Combustion behaviour of Turkish lignite in O-2/N-2 and O-2/CO2 mixtures by using TGA-FTIR
Selçuk, Nevin (2011-03-01)
The pyrolysis and combustion behaviour of a low calorific value Turkish lignite with high sulphur and ash content in air and oxy-fuel conditions were investigated by using non-isothermal thermo-gravimetric method (TGA) coupled with Fourier-transform infrared (FTIR) spectrometer. Pyrolysis tests were carried out in nitrogen and carbon dioxide environments which are the main diluting gases of air and oxy-fuel environment, respectively. Pyrolysis results show that weight loss profiles are almost the same up to...
Combustion characteristics of Turkish lignites at oxygen-enriched and oxy-fuel combustion conditions
Barzegar, Ramin; Yozgatlıgil, Ahmet; Atımtay, Aysel (2019-10-01)
Combustion and oxy-fuel combustion characteristics of two Turkish lignites (Orhaneli and Soma) were investigated by Thermogravimetric Analysis (TGA) method. Experiments were carried out under oxygen-enriched air and oxy-fuel combustion conditions with 21, 30, 40% oxygen concentrations. Three heating rates of 5, 10, and 20 degrees C/min were considered and the isoconversional kinetic methods of FWO, KAS, and Friedman were employed to estimate activation energies. The uncertainty assessment in obtaining the a...
Combustion of Turkish lignites and olive residue: Experiments and kinetic modelling
Magalhaes, Duarte; Kazanç Özerinç, Feyza; Riaza, Juan; Erensoy, Sevgi; Kabakli, Ozde; Chalmers, Hannah (2017-09-01)
This study investigated the combustion behavior and kinetics of Turkish fuels. Two lignite coals from Tuncbilek and Soma region, and olive residue, were used, all within a size range of 106-125 mm. Experiments were performed in a thermogravimetric analyzer (TGA) coupled with a differential thermal analyzer (DTA), under three different heating rates, namely 15, 20, and 40 degrees C/min. Based on the weight loss (TG) and derivative weight loss (DTG) curves, the characteristic temperatures were determined, thr...
Low-temperature oxidation reactions of crude oils using TGA-DSC techniques
Kök, Mustafa Verşan; Nurgaliev, Danis K. (Springer Science and Business Media LLC, 2020-07-01)
In this research, combustion behaviour of three crude oils with different degrees API gravities was analysed. The thermogravimetric analyser (TGA) and differential scanning calorimeter (DSC) experiments were performed using three different heating rates (2, 5, and 10 degrees C min(-1)) under air atmosphere. The reaction regions, burn-out temperatures, and peak temperatures were determined accordingly. Two main reaction regions, particularly the low-temperature oxidation (LTO) and high-temperature oxidation ...
Combustion behavior and kinetics of a Turkish lignite blended with biomass/magnesite dust
Yousefzad Farrokhi, Farshid; Kazanç Özerinç, Feyza; Department of Mechanical Engineering (2017)
This study investigated the effect of blending on the combustion behavior of Turkish lignite blended with biomass or magnesite dust using a thermogravimetric analyzer (TGA) under air atmosphere. The lignite used in this study is Tunçbilek lignite (TL), which is blended with the biomass types; olive residue (OR) and almond shell (AS), and the inorganic industrial waste, magnesite dust (MD). The blends are composed of various weight fractions of fuels, with a constant weight fraction of molasses (10 wt. %) as...
Citation Formats
S. Bagci Suat and M. V. Kök, “Combustion reaction kinetics studies of Turkish crude oils,” Energy and Fuels, pp. 1472–1481, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35851.