Effect of microwave on formation/decomposition of natural gas hydrate

查看全文 作　　者：LIANG [1]DeQing;HE [1,2]Song;LI [1]DongLiang

机构地区：[1]Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy and Gas Hydrate, CAS, Guangzhou 510640, China;[2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》索引2009年第54卷第6期,共7页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 50676097);State Key Development Program for Basic Research of China (Grant No. 2009CB219500) 摘　　要：Natural gas hydrate (NGH) reservoirs have been considered as a substantial future clean energy re-source and how to recover gas from these reservoirs feasibly and economically is very important. Mi-crowave heating will be taken as a promising method for gas production from gas hydrates for its ad-vantages of fast heat transfer and flexible application. In this work, we investigate the formation /decomposition behavior of natural gas hydrate with different power of microwave (2450MHZ), pre-liminarily analyze the impact of microwave on phase equilibrium of gas hydrate,and make calculation based on van der Waals-Platteeuw model. It is found that microwave of a certain amount of power can reduce the induction time and sub-cooling degree of NGH formation, e.g., 20W microwave power can lead to a decrease of about 3℃ in sub-cooling degree and the shortening of induction time from 4.5 hours to 1.3 hours. Microwave can make rapid NGH decomposition, and water from NGH decomposi-tion accelerates the decomposition of NGH with the decomposition of NGH. Under the same pressure, microwave can increase NGH phase equilibrium temperature. Different dielectric properties of each composition of NGH may cause a distinct difference in temperature in the process of NGH decomposi-tion. Therefore, NGH decomposition by microwave can be affected by many factors. 关键词：天然气水合物分解行为微波加热微波功率诱导时间天然气产量清洁能源快速传热

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Effect of microwave on formation/decomposition of natural gas hydrate

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