Experimental investigation of carbon dioxide injection effects on methane-propane-carbon dioxide mixture hydrates

Abbasov, Abbas
Merey, Sukru
Parlaktuna, Mahmut
In this research, first, hydrate with high saturation in porous media (sand sediments) was formed in fully filled high pressure cell by using a mixture of the following gases at 4 degrees C: methane (CH4), propane (C3H8) and carbon dioxide (CO2). The feed mole percent of the gases used was selected as follows: CH4 (95%), C3H8 (3%), CO2 (2%). This selection was made in order to form natural gas hydrate of thermogenic origin (sII type hydrate). Thereafter, CO2 injection into the high saturation hydrate media was performed in order to elucidate possible CH4 recovery. However, it was observed that injected CO2 was not able to flow through sediments, because of the impermeable barrier created by hydrate, and because of the fact that no free space was left in the cell as it was completely filled with porous media resulting in mass transfer limitations. Therefore, it was proposed that methane recovery occurred only near the hydrate interface. Taking into consideration obtained results, in the next step we decreased the volume of the sand, to create a space for the free gas evolution above the high saturation hydrate, and further completely replaced free gas composition by CO2. We observed that this time not only CH4, but C3H8 was recovered from hydrate phase implying further reconsideration of the injection of CO2 into sII hydrate. The results of this study imply that it is possible to recover hydrocarbon gases from hydrates more stable than CO2 hydrate by creating a CO2 rich environment.


Kinetic Analysis of Methane Hydrate Formation with Butterfly Turbine Impellers
Longinos, Sotirios Nik.; Longinou, Dionisia Dimitra; Myrzakhmetova, Nurbala; Akimbayeva, Nazgul; Zhursumbaeva, Mariamkul; Abdiyev, Kaldibek; Toktarbay, Zhexenbek; Parlaktuna, Mahmut (2022-07-01)
Heat generation during gas hydrate formation is an important problem because it reduces the amount of water and gas that become gas hydrates. In this research work, we present a new design of an impeller to be used for hydrate formation and to overcome this concern by following the hydrodynamic literature. CH4 hydrate formation experiments were performed in a 5.7 L continuously stirred tank reactor using a butterfly turbine (BT) impeller with no baffle (NB), full baffle (FB), half baffle (HB), and surface b...
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Tanrikut, A; Yesin, O (2005-01-01)
In this research study, in-tube condensation in the presence of air was investigated experimentally at a heat exchanger of countercurrent type for different operating conditions. The test matrix for the steady-state condition covers the range of pressures P = 1.8 to 5.5 bars, vapor Reynolds numbers Re, = 45 000 to 94 000, and inlet air mass fraction values Xi = 0 to 52%. The effect of air manifests itself by a reduction in the local heat flux and the local heat transfer coefficient. The local heat transfer ...
Adsorption behaviour of shale gas reservoirs
Merey, Sukru; Sınayuç, Çağlar (2018-01-01)
Experimental adsorption measurements for one shale sample were conducted at 25 degrees C, 50 degrees C and 75 degrees C up to 2,000 psia by using pure methane (CH4) and pure carbon dioxide (CO2) to understand the behaviour of CH4 and CO2 adsorption on shales. The effects of temperature and pressure on CH4 and CO2 adsorption on the shale sample were observed. When temperature decreases from 75 degrees C to 25 degrees C, the adsorption capacity increases for both CH4 and CO2 adsorption. As pressure increases,...
Adsorption calorimetry in supported catalyst characterization : adsorption structure sensitivity on pt(y-Al2o3
Üner, Murat; Üner, Deniz; Department of Chemical Engineering (2004)
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. 2 % Pt/Al2O3 catalysts were prepared by incipient wetness method; the particle size of the catalysts was manipulated by calcining at different temperatures. The dispersion values for the catalysts calcined in air at 683K, 773K and 823K were measured as 0.62, 0.20 and 0.03 respectively. The differential heats of adsorption of hydrogen, carbon ...
Adsorption properties of a natural zeolite-water pair for use in adsorption cooling cycles
Solmus, Ismail; Yamali, Cemil; KAFTANOĞLU, BİLGİN; Baker, Derek Keıth; Caglar, Ahmet (2010-06-01)
The equilibrium adsorption capacity of water on a natural zeolite has been experimentally determined at different zeolite temperatures and water vapor pressures for use in an adsorption cooling system. The Dubinin-Astakhov adsorption equilibrium model is fitted to experimental data with an acceptable error limit. Separate correlations are obtained for adsorption and desorption processes as well as a single correlation to model both processes. The isosteric heat of adsorption of water on zeolite has been cal...
Citation Formats
A. Abbasov, S. Merey, and M. Parlaktuna, “Experimental investigation of carbon dioxide injection effects on methane-propane-carbon dioxide mixture hydrates,” JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, pp. 1148–1158, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39541.