Effect of clay content on combustion reaction parameters

2005-04-15
Bağcı, Ali Suat
The role of clay in reservoirs and its possible influence oil kinetics of crude oil burning is not entirely clear However, it is known that (1) clay fractions of the reservoir matrix possess the highest surface area per gram, (2) clay fractions are the most chemically reactive of the inorganic constituents present in the reservoir and (3) clay minerals generally possess catalytic properties toward various organic liquids. This study was aimed to investigate the role of clay on thermo-oxidative behavior of crude oil at different clay contents in limestone medium. To do this, lion-isothermal kinetic experiments were conducted in a reaction cell by injecting 1.5 lt/min of air into the cell having matrix containing limestone (92% calcite, 66% doloinite and 1.4% quartz) with 0, 5 and 10% addition of clay (kaolin). The pre-combustion and combustion behavior of Batt Raman (12.9 degrees API gravity) crude oil from south-east Turkey was studied by using continuous analysis of produced gases. Clay content of the matrix influenced the amount of the fuel deposited oil the limestone. More fuel was increasingly deposited as the clay content was increased. Addition of clay also increased the combustion peak temperature. This call be attributed to the (1) or (3) of the preceding section. Results also indicate that the average molar CO2/CO ratio increased from 3.71 to 5.97 upon addition of 10% clay to the limestone. Finally, a uniform trend of decreasing activation energies as well as the Arrhenius constants by addition of clay to the limestone was observed. It was concluded that clay's large surface area affects the values of Arrhenius constant, while it is the catalytic properties of clay that lower the activation energies of all three major reactions (i.e., low temperature oxidation, fuel deposition and fuel combustion) involved in the in-situ combustion process.
ENERGY SOURCES

Suggestions

Effect of heating rate on thermal properties and kinetics of raw and cleaned coal samples
Özbas, Kazim Esber; Hicyilmaz, Cahit; Kök, Mustafa Verşan (Informa UK Limited, 2003-01-01)
In this article, thermogravimetry (TG/DTG) was used to determine the effect of heating rate on the thermal properties and kinetics of raw and cleaned coal samples from Soma, Tuncbilek, and Afsin Elbistan regions. TG/DTG experiments were carried out at 4 different heating rates (5, 10, 15, and 20degreesC/min). Generally, for all of the samples higher peak and burnout temperatures were measured with an increasing heating rate. Kinetic parameters of the samples were determined using an Arrhenius-type kinetic m...
Determination of wettability and its effect on waterflood performance in limestone medium
Karabakal, U (American Chemical Society (ACS), 2004-03-01)
Wettability measurement methods, the effect of wettability on fluid distribution, and fluid flow in porous media were discussed, and the influence of rock wettability on the relative permeability and recovery of oil by waterflooding were investigated. Experimental studies were conducted on a total of 23 core plugs from two different limestone formations. Synthetic brine (NaCl solution) and mineral oil, which has a viscosity ratio of similar to10, were used as the test fluids. Core samples, saturated with sy...
Effect of pressure on combustion kinetics of heavy oils
Bağcı, Ali Suat (Informa UK Limited, 2005-07-01)
In this study, 16 experiments were conducted to study the effects of pressure on crude oil oxidation in limestone medium. Karakus (29 degrees API), Beykan (32 degrees API), Bati Raman (12 degrees API), Camurlu ( 12 degrees API), Adiyaman (26 degrees API), Garzan (28 degrees API) and Raman (18 degrees API) crude oil from Turkish oil fields were used. The mixture of limestone and the crude oil was subjected to a controlled heating schedule under a constant flow rate of air. The produced gas was analyzed for i...
Effect of Carboxy Methyl Cellulose and Determination of Pore Throat Criteria for Water-based Drilling Fluids
Kök, Mustafa Verşan (Informa UK Limited, 2009-01-01)
In this research, the effect of carboxy methyl cellulose (CMC) on the rheological properties of two different water-based drilling fluids was studied. It was observed that the fluid loss decreased as CMC concentration increased, but the rate of decrease was too low to notice after 1 gr. CMC. It was also observed that shear stress increased as the CMC concentration increased. Experimentally, it was observed that 1 gr. CMC/350 ml of drilling fluid slurry is sufficiently appropriate for optimum rheological eff...
Effects of operational parameters and ultrasonic pretreatment on supercritical CO2 extraction of diesel fuel from soil
Guvenc, A; Mehmetoglu, U; Mehmetoglu, T (Informa UK Limited, 2004-01-01)
Supercritical fluid extraction (SFE) using CO2 was performed on soil material artificially contaminated with diesel fuel. Raising the temperature from 313 K to 343 K caused the recovery efficiency to increase from 52 to 76%. Pressure and CO2 flow rate were found to be less important. As expected, increasing extraction time resulted in higher recoveries. Ultrasonic pretreatment of the soil material was found to be very effective, possibly due to disrupting the strong interaction bonding between soil matrix a...
Citation Formats
A. S. Bağcı, “Effect of clay content on combustion reaction parameters,” ENERGY SOURCES, pp. 579–588, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62383.