甲烷水合物在冰浆中的鼓泡生成特性

Bubbling formation characteristics of methane hydrate in ice slurry

以水合物的形式储运天然气具有储存压力低、安全可靠等优点,但水合物在天然气储运技术领域的应用仍然受到储气量低、生成速度慢等因素的限制。以甲烷水合物为研究对象,通过试验研究了压力、恒温浴温度、表面活性剂SDS质量浓度以及甲烷气体进气时间对甲烷水合物在冰浆中鼓泡生成的作用规律。试验压力范围为4～6 MPa,恒温浴温度范围为-1～1℃,表面活性剂SDS质量浓度范围为100～800 mg/L。结果表明:压力变化对最终的储气体积摩尔浓度影响不大;当恒温浴温度由-1℃上升至1℃时,反应持续时间缩短11.5%～17.4%,储气体积摩尔浓度降低7.4%～8.5%;适当延长进气时间,有助于缩短诱导时间,提高甲烷水合物的生成速率和最终储气体积摩尔浓度。

The storage and transportation of natural gas in the form of hydrate has the advantages of low storage pressure,safety and reliability,but the application of hydrate in the field of natural gas storage and transportation technology is hindered by low gas storage,low formation rate and other factors.In this paper,methane hydrate was taken as the research object.The effecting laws of pressure,temperature of constant temperature bath,mass concentration of surfactant SDS and intake time of methane on the bubbling formation of methane hydrate in ice slurry were studied by experiment.The pressure of the experiment is in the range of 4-6 MPa,the temperature of the constant temperature bath is between-1℃and 1℃,and the mass concentration of surfactant SDS is in the range of 100-800 mg/L.It is shown that the pressure change has little effect on the ultimate gas storage molar volumetric density,the temperature of the constant temperature bath rises from-1℃to 1℃,the reaction duration is shortened by 11.5%-17.4%,and the molar volumetric concentration of gas storage is reduced by 7.4%-8.5%.In addition,extending the intake time appropriately is conducive to shorten the induction time and increase the formation rate and ultimate gas storage molar volumetric concentration.