Examination of methane hydrate formation by the use of dual impeller combinations

Longinos, Sotirios Nik.
Parlaktuna, Mahmut
The kinetics of methane gas hydrates formation was obtained by different dual impeller (DI) experiments with full baffle (FB) at 42.5 bar pressure and 2 °C temperature. There were 18 (dual and dual mixed) experiments by the use of pitched blade turbine upward trending (PBTU), pitched blade turbine downward trending (PBTD), rushton turbine (RT) and new impeller design trapezoid turbine in upward trending and down ward trending, TTU and TTD respectively. There were estimations of induction time, duration of hydrate formation, rate of hydrate formation, hydrate formation rate constant, hydrate yield and power consumption. The experiments with radial flow in the upper part of shaft showed better outcomes compared to other combinations for dual impellers in hydrate yield, rate of hydrate formation and hydrate formation rate constant.
Reaction Kinetics, Mechanisms and Catalysis


Kinetic study of methane hydrate formation with the use of a surface baffle
Longinos, Sotirios Nik; Longinou, Dimitra-Dionisia; Celebi, Erdem; Toktarbay, Zhexenbek; Parlaktuna, Mahmut (2021-09-01)
The kinetics of methane gas hydrate formation was obtained by different dual and dual mixed impeller experiments with surface baffle at 42.5 bars pressure and 2 degrees C temperature. The outcomes indicated that induction time is lower in radial flow experiments compared to mixed flow experiments due to better gas liquid contact, uniform shear stress and good pumping capacity compared to mixed flow ones with values less 15 min. Radial flow experiments showed higher values in hydrate yield although the durat...
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Thermodynamic quantities such as the isothermal compressibility, thermal expansion and the difference in the specific heat are calculated as a function of pressure (T=10 K) for the alpha,-alpha and alpha ' phases of oxygen using the observed Raman frequencies of the two librons and one vibron from the literature through the mode Gruneisen parameter for this molecular solid. Calculated thermodynamic quantities decrease with increasing pressure with some discrepancies due to the different pressure - induced R...
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Longinos, Sotirios Nik; Parlaktuna, Mahmut (2021-03-01)
Hydrate formation characteristics and hydrodynamic behavior have been investigated for mixture of methane-propane hydrate formation with pure water and with the amino acid of lysine 1.5 wt% at 24.5 bars and 2 degrees C. There were total 12 experiments with full and no baffle estimating the induction time, rate of hydrate formation, hydrate productivity and power consumption. The outcomes showed that radial flow experiments with radial flow have better behavior compared to mixed flow ones due to better inter...
Investigation and comparison of mixed matrix membranes composed of polyimide matrimid with ZIF-8, silicalite, and SAPO-34
Carter, D.; Tezel, F. H.; Kruczek, B.; Kalıpçılar, Halil (2017-12-15)
Mixed Matrix type membranes (MMMs) containing 10 wt% of either silicalite, SAPO - 34, and ZIF - 8 in polyimide Matrimid were fabricated and tested for their suitability to separate a number of gas mixtures by conducting single gas permeation experiments using H-2, CO2, N-2, and CH4 gases. The transport of these gases through the polymeric and inorganic membrane phases, as well as their interfacial voids, have additionally been distinguished from each other by fabricating MMMs containing non-calcined fillers...
Orbey, H.; Orbey, N. (Informa UK Limited, 1989-3)
A data reduction technique is introduced for the evaluation of second virial coefficients of gases at subcritical temperatures. The method makes use of the vapor-liquid equilibrium data, i.e., temperature, saturation pressure, liquid and vapor molar volumes and can be used to obtain second virial coefficients of a wide variety of fluids including polar, associating and quantum gases. The calculated second virial coefficients are in good agreement with their counterparts from literature, which are obtained f...
Citation Formats
S. N. Longinos and M. Parlaktuna, “Examination of methane hydrate formation by the use of dual impeller combinations,” Reaction Kinetics, Mechanisms and Catalysis, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85109345235&origin=inward.