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Study of the Kinetics and Morphology of Gas Hydrate Formation

2006; Wiley; Volume: 29; Issue: 8 Linguagem: Inglês

10.1002/ceat.200500222

1521-4125

Shamima Hussain, Anil Kumar, Sukumar Laik, Ajay Mandal, Iftikhar Ahmad,

Hydrocarbon exploration and reservoir analysis

Chemical Engineering & TechnologyVolume 29, Issue 8 p. 937-943 Full Paper Study of the Kinetics and Morphology of Gas Hydrate Formation S. M. T. Hussain, S. M. T. Hussain Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorA. Kumar, A. Kumar Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorS. Laik, S. Laik Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorA. Mandal, A. Mandal mandal_ajay@hotmail.com Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorI. Ahmad, I. Ahmad Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this author S. M. T. Hussain, S. M. T. Hussain Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorA. Kumar, A. Kumar Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorS. Laik, S. Laik Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorA. Mandal, A. Mandal mandal_ajay@hotmail.com Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this authorI. Ahmad, I. Ahmad Department of Petroleum Engineering, Indian School of Mines, Dhanbad, IndiaSearch for more papers by this author First published: 03 August 2006 https://doi.org/10.1002/ceat.200500222Citations: 11AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract The kinetics and morphology of ethane hydrate formation were studied in a batch type reactor at a temperature of ca. 270–280 K, over a pressure range of 8.83–16.67 bar. The results of the experiments revealed that the formation kinetics were dependant on pressure, temperature, degree of supercooling, and stirring rate. Regardless of the saturation state, the primary nucleation always took place in the bulk of the water and the phase transition was always initiated at the surface of the vortex (gas-water interface). The rate of hydrate formation was observed to increase with an increase in pressure. The effect of stirring rate on nucleation and growth was emphasized in great detail. The experiments were performed at various stirring rates of 110–190 rpm. Higher rates of formation of gas hydrate were recorded at faster stirring rates. The appearance of nuclei and their subsequent growth at the interface, for different stirring rates, was explained by the proposed conceptual model of mass transfer resistances. The patterns of gas consumption rates, with changing rpm, have been visualized as due to a critical level of gas molecules in the immediate vicinity of the growing hydrate particle. Nucleation and decomposition gave a cyclic hysteresis-like phenomena. It was also observed that a change in pressure had a much greater effect on the rate of decomposition than it did on the formation rate. Morphological studies revealed that the ethane hydrate resembles thread or is cotton-like in appearance. The rate of gas consumption during nucleation, with different rpm and pressures, and the percentage decomposition at different pressures, were explained precisely for ethane hydrate. Citing Literature Volume29, Issue8August, 2006Pages 937-943 RelatedInformation