Study of Extracted Coalmine Gas Storage and Transportation Technology Based on HydrationReport as inadecuate




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Accelerating hydrate formation is the key of extracted coalmine gas storage and transportation by using hydrate technique. Using hydrate equipment, the effects of tetrahydrofuran THF solution mixture of sodium dodecyl sulfate SDS on gas hydrate curing process were studied. The test systems were tetrahydrofuranTHFsolution with molar concentration of 0.3 mol.L-1 and mixture of sodium dodecyl sulfate SDS with three different molar concentrations of 0.2 ,0.35 and 0.50mol.L-1. The pressure- temperature-time p-T-t curves in the formation process were obtained and the gas hydrate formation rate was calculated based on the formula of gas hydrate formation rate. The results showed that addition of THF solution mixture of SDS solution enhanced the hydrate formation rate to certain extent, leading to the acceleration of gas hydrate formation. Hydrate formation rate tended to improve with the increase of SDS concentration in three text systems and the highest formation rate could get up to 4.522×10-6m3·h-1, with SDS molar concentration of 0.50mol.L-1 .

KEYWORDS

extracted gas; hydrate; formation rate; gas hydration curing; gas storage and transportation

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Author: Qiang Wu, Taotao Xu, Bo Pang, Baoyong Zhang

Source: http://www.scirp.org/



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