Comparative combustion kinetics for in situ combustion process

In this research, thermal characteristics and combustion kinetics of three crude oils (13-27 degrees API) were investigated using DuPont 9900 thermal analysis system (TG/DTG). A sample size of 10 mg. heating rate of 10 degreesC min(-1) were used in the temperature range of 20-700 degreesC under air atmosphere. Theoretically, combustion of fuel can be initiated whenever oxygen comes in contact with fuel. However, the temperature, composition of fuel and oxygen supply dictates the nature of this reaction. In combustion with air, three distinct reaction regions were identified in all crude oils studied known as low temperature oxidation (LTO), fuel deposition (FD) and high temperature oxidation (HTO). A computer program was developed for automatically processing the data to estimate the reaction parameters using different models and the results are discussed.


DSC study of the combustion properties of turkish coals
Ozbas, K.E.; Kök, Mustafa Verşan; Hicyilmaz, C. (Springer Science and Business Media LLC, 2003-01-01)
In this research, differential scanning calorimetry (DSC) was used to determine the combustion behavior and kinetic analysis of raw and cleaned coal samples of different size fractions. DSC curves of the three coal samples (Soma, Tuncbilek and Afsin Elbistan) showed two reaction regions. The first reaction region was due to moisture loss (endothermic) and observed in the temperature range of ambient to 150°C. The second region was the exothermic region due to the combustion and observed in the temperature r...
Effect of halloysite nanotubes on multifunctional properties of coaxially electrospun poly(ethylene glycol)/polyamide-6 nanofibrous thermal energy storage materials
Yilmaz, Refik Baris; Bayram, Göknur; YILMAZER, ÜLKÜ (Elsevier BV, 2020-08-01)
Coaxial electrospinning of poly(ethylene glycol) (PEG)/polyamide 6 (PA6) was successfully used in development of nanofibrous thermal energy storage (TES) material. Halloysite nanotubes (HNTs) were introduced into the core/shell structured TES materials at various concentrations (0.5, 1, 3 and 5 wt. %). Surface activation of HNT was also conducted by piranha etching in order to increase the affinity between piranha-etched nanotubes (HNT-P) and PEG. The core/shell structured materials were characterized using...
Novel thermally stable organo-montmorillonites from phosphonium and imidazolium surfactants
Abdallah, Wissam; Yılmazer, Ülkü (Elsevier BV, 2011-10-20)
To circumvent the deleterious early decomposition effects of thermally unstable alkyl ammonium-treated montmorillonites when processed with high-melting-point polymers, high thermally stable salts are used as intercalant agents for sodium montmorillonite rich bentonites of Turkish origin, by an ion exchange reaction to produce organo-montmorillonites with enhanced thermal stability. The bentonite clay was purified by sedimentation, resulting in higher cation exchange capacity and thermal stability in compar...
Adsorption calorimetry in supported catalyst characterization: Adsorption structure sensitivity on Pt/-gamma-Al2O3
Üner, Deniz (Elsevier BV, 2005-08-15)
In this study, the structure sensitivity of hydrogen, oxygen and carbon monoxide adsorption was investigated by changing the metal particle size of Pt/Al2O3 catalysts. The 2% Pt/Al2O3 catalysts were prepared by incipient wetness method; the particle size of the catalysts was modified by calcining at different temperatures. The differential heats of adsorption of hydrogen, carbon monoxide and oxygen were measured using a SETARAM C80 Tian-Calvet calorimeter. Hydrogen chemisorption sites with low and intermedi...
Hydrogen storage capacity of Be@C-115 system
Türker, Burhan Lemi (Elsevier BV, 2005-05-20)
Semiempirical quantum chemical analysis of a Be doped single-walled, semicapped, armchair type nanotube, Be@C-115, was achieved at the level of PM3 (RHF) type calculations for some of its quantum chemical properties and hydrogen storage capacity. The Be@C-115 system was found to be capable of storing 1-5 hydrogen molecules as endohedral dopant(s), whereas the sixth hydrogen molecule was expelled out. All the structures, (Be+nH(2))@C-115 were found to be stable and endothermic. Moreover, the increasing numbe...
Citation Formats
M. V. Kök, “Comparative combustion kinetics for in situ combustion process,” THERMOCHIMICA ACTA, pp. 143–147, 2001, Accessed: 00, 2020. [Online]. Available: