Study on synthesis characteristics of methane hydrate at mesoscopic scale
ZHAO Xiao-chen1, ZHAO Jian-zhong1,2, GAO Qiang1, WANG Ya-dong1
1. Key Laboratory of In-situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030000, China; 2. Key Laboratory of Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510000, China
Abstract: In order to study the formation speed and gas storage capacity of methane hydrate at mesoscopic scale,mesoporous molecular sieve SBA-15 is selected as porous medium in the experiment,and thermodynamic promoters THF and TBAB as well as surfactant SDS are added to improve the hydration reaction speed.The hydrates formation experiments are carried out under constant volume and constant temperature,with pressure at 2.0 MPa and 1.8 MPa,and the temperature at 282.15 K and 279.15 K.The experimental results show that under the joint action of the additives,the synthesis speed of hydrate in mesoscopic scale increases significantly.During the reaction process,the temperature fluctuates in a small range,up to 0.6 K,indicating its good heat transfer performance.In terms of hydrate's gas storage capacity,the maximum gas storage value reaches 45.826 mmol (10 mL water) in the experiment.At the same time,higher pressure and lower temperature can effectively improve the hydration reaction speed at mesoscopic scale,and the maximum generation rate reaches 2.335 mmol per minute.THF is superior to TBAB in promoting hydrate formation,improving gas storage capacity of hydrate and accelerating hydrate reaction speed.
赵小晨, 赵建忠, 高强, 王亚东. 介观尺度下甲烷水合物合成特性研究[J]. 现代化工, 2020, 40(3): 157-161.
ZHAO Xiao-chen, ZHAO Jian-zhong, GAO Qiang, WANG Ya-dong. Study on synthesis characteristics of methane hydrate at mesoscopic scale. Modern Chemical Industry, 2020, 40(3): 157-161.
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