Effect of Ultrasonic on Coal-bed Methane Hydrate Formation

摘要：

The effect of ultrasonic on the induction time and formation rate of coal-bed methane hydrates (mol percent of methane, ethane and propane are 91.89 ％, 5.04 ％, 3.07％, respectively) was investigated. The experiments were carried out in a high-pressure system with ultrasonic (the frequency f=20 kHz, an adjustable power 0-150 W). Two different cases were compared: distilled water and sodium dodecyl sulfate (SDS) aqueous solution. In water-gas system, the experimental results indicate that the induction time with ultrasonic was about 1/6 of that without ultraosinc and only about 1/10 if rehydration after decomposition. But in SDS-aqueous-solution-gas system, the phenomenon of critical micellar concentration (CMC) of sodium dodecyl sulfate water solution was not found with ultrasonic. Also, the rate and storage capacity of hydrate increase with SDS concentration between 0 and 800×10-6, while insignificantly between 600×10-6 and 800×10-6.

关键词： ultrasonic coal-bed methane hydrate induction time formation rate storage capacity

作者: SUN Shicai TAN Yunzhen

作者单位: College of Civil Engineering and Architecture,Shandong University of Science & Technology,Qingdao 26 College of Natural Resources and Environmental Engineering.Shandong University of Science & Technolo

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1701-1703

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）