Gas Hydrate Growth Kinetics: A Parametric Study

Remi-Erempagamo Tariyemienyo Meindinyo and Thor Martin Svartaas
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Remi-Erempagamo Tariyemienyo Meindinyo: Department of Petroleum Engineering, University of Stavanger, 4036 Stavanger, Norway
Thor Martin Svartaas: Department of Petroleum Engineering, University of Stavanger, 4036 Stavanger, Norway

Energies, 2016, vol. 9, issue 12, 1-29

Abstract: Gas hydrate growth kinetics was studied at a pressure of 90 bars to investigate the effect of temperature, initial water content, stirring rate, and reactor size in stirred semi-batch autoclave reactors. The mixing energy during hydrate growth was estimated by logging the power consumed. The theoretical model by Garcia-Ochoa and Gomez for estimation of the mass transfer parameters in stirred tanks has been used to evaluate the dispersion parameters of the system. The mean bubble size, impeller power input per unit volume, and impeller Reynold’s number/tip velocity were used for analyzing observed trends from the gas hydrate growth data. The growth behavior was analyzed based on the gas consumption and the growth rate per unit initial water content. The results showed that the growth rate strongly depended on the flow pattern in the cell, the gas-liquid mass transfer characteristics, and the mixing efficiency from stirring. Scale-up effects indicate that maintaining the growth rate per unit volume of reactants upon scale-up with geometric similarity does not depend only on gas dispersion in the liquid phase but may rather be a function of the specific thermal conductance, and heat and mass transfer limitations created by the limit to the degree of the liquid phase dispersion is batched and semi-batched stirred tank reactors.

Keywords: methane hydrate growth kinetics; factors that affect gas hydrate growth rate; reactor scale-up; temperature; stirring rate; water content; mass and heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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