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《能源化学(英文版)》 2015-05
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Energy-efficient methods for production methane from natural gas hydrates

Jun Chen;Yan-Hong Wang;Xue-Mei Lang;Shuan-Shi Fan;Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, South China University of Technology;  
Gas hydrates now are expected to be one of the most important future unconventional energy resources. In this paper, researches on gas hydrate exploitation in laboratory and field were reviewed and discussed from the aspects of energy efficiency. Different exploiting methods and different types of hydrate reservoir were selected to study their effects on energy efficiencies. Both laboratory studies and field tests have shown that the improved technologies can help to increase efficiency for gas hydrate exploitation. And it also showed the trend that gas hydrate exploitation started to change from permafrost to marine. Energy efficiency ratio(EER) and energy return on energy invested(EROI) were introduced as an indicator of efficiency for natural gas hydrate exploitation. An energy-efficient hydrate production process, called "Hydrate Chain Energy System(HCES)", including treatment of flue gas, replacement of CH4 with CO2, separation of CO2 from CH4, and storage and transportation of CH4 in hydrate form, was proposed for future natural gas hydrate exploitation.In the meanwhile, some problems, such as mechanism of CO2 replacement, mechanism of CO2 separation,CH4 storage and transportation are also needed to be solved for increasing the energy efficiency of gas hydrate exploitation.
【Fund】: supported by the National Natural Science Foundation of China (51176051 and 51106054);; the Fundamental Research Funds for the Central University (2015ZM057 2013ZZ0032 and 2014ZP0007);; China Postdoctoral Science Foundation (2015M572321);; the Petro China Innovation Foundation (2013D-5006-0107)
【CateGory Index】: TQ221.11
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