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Sorption of light hydrocarbons on clays from the Oligocene Kiscell Clay Formation, Hungary

Tóth J.

Mineralogia

2009

Vol. 40, iss. 1/4

43--52

Clays from Solymár (Hungary) were treated with volatile components of light hydrocarbon in order to investigate their ability to sorb these organic compounds. The clays were characterized using XRD, optical microscopy (thin sections) and CEC measurements. The contaminated samples were analyzed using ATD-GC-MS, Rock Eval and XRD. Volatilization of the fluid phase hydrocarbon was monitoring for 663 days. The quantity of volatilized hydrocarbon compounds reached 50.0–65.0% at the end of the experiment. All of the analyses indicate hydrocarbon pollution of the clay layers after the volatilization process. The gross compositions of the fluid and the sorbed phases are different; the total amount of cycloalkanes among the sorbed hydrocarbons is very low. The dominant sorbed components are toluene, xylenes, nC9, nC10, nC11 and nC7. Cyclohexane, methylcyclohexane, benzene, nC12 and nC13 also occur in lower concentrations. The geochemical and XRD results indicate that adsorption onto the external surfaces of the clay minerals was the main sorption process.

Predykcyjna metoda obliczania stałych Henry'ego dla lekkich węglowodorów z ciężkim węglowodorem jako rozpuszczalnikiem

Stelmachowski M., Zarzycki R.

Inżynieria Chemiczna i Procesowa

2002

T. 23, z. 1

117-130

Przedstawiono predykcyjną metodę obliczania stałych Henry'go dla lekkich węglowodorów w wysokowrzących węglowodorach na podstawie zmodyfikowanego modelu UNIFAC-FV. Uzyskano bardzo dobrą zgodność wyników doświadczalnych oraz obliczonych teoretycznie.

A modified UNIFAC-FV model was proposed to predict Henry.s constants for light hydrocarbon-high-boiling hydrocarbon systems. Very good agreement with experimental data has been achieved.

Hydrocarbon inclusions in vein quartz (the "Marmarosh diamonds") from the Krosno and Dukla zones of the Ukrainian Carpathians

Dudok I., Jarmołowicz-Szulc K.

Geological Quarterly

2000

Vol. 44, Nr 4

415-423

Fluid inclusion studies were conducted in the vein quartz known as the "Marmarosh diamonds" of the Krosno and Dukla zones of the Ukrainian Carpathians, which are potentially oil- and gas-bearing. The "Marmarosh diamonds" contain different types of fluid inclusions which record the evolution of the quartz formation. The inclusions were studied by means of gas chromatography, microthermometry and fluorescence. The following sequence has been observed: methane inclusions displaying characteristic features due to crystallography, light hydrocarbons, complex inclusions with a variety of bitumens, and gas-liquid inclusions with two different hydrocarbon phases. The regions where the light hydrocarbon inclusions occur seem to be the most promising as regards oil and gas prospects.