000			01643nab a2200205 4500
005			20260520000836.0
008			260224s2009 xxu
245	0	0	_aGas hydrate formation in a variable volume bed of silica sand particles
260			_a _b _cnov./dic. 2009
270			_a08/06/2010 ; 08/06/2010
300			_a11 p. ; 5496-5507
520			_aTranscripción del resumen del autor. Gas hydrate formation was studied in a new apparatus designed to accommodate three different size volume beds of silica sand particles. The sand particles have an average diameter equal to 329 µm. The hydrate was formed in the water, which occupied the interstitial space of the water-saturated silica sand bed. A bulk gas phase was present above the bed (gas cap). Gas uptake measurements were carried out during experiments at constant temperature. More than 74.0% of water conversion to hydrate was achieved in all experiments conducted with methane at 4.0 and 1.0 °C. An initial slow growth was followed by a rapid hydrate growth rate of equal magnitude for nearly all experiments until 43-53% of water was converted to hydrate. During the third and final growth stage, the final conversions were between 74 and 98% and the conversion dynamics changed. Independent verification of hydrate formation in the sand was achieved via Raman spectroscopy and morphology observations in experiments using the same sand/water system.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aLinga, Praveen _942267
100	1		_aHaligva, Cef _942268
100	1		_aChan Nam, Sung _942269
999			_c170782 _d170782