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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (2): 95-99. 上一篇    下一篇

研究论文

甲烷水合物膜生长动力学研究

彭宝仔, 罗虎, 孙长宇, 马庆兰, 周伟,陈光进*   

  1. (中国石油大学(北京)重质油国家重点实验室 北京 102249)
  • 投稿日期:2006-04-24 修回日期:2006-06-15 发布日期:2007-01-28
  • 通讯作者: 陈光进

Study on Growth Kinetics of Methane Hydrate Film

PENG Bao-Zi; LUO Hu; SUN Chang-Yu; MA Qing-Lan; ZHOU Wei; CHEN Guang-Jin*   

  1. (State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249)
  • Received:2006-04-24 Revised:2006-06-15 Published:2007-01-28
  • Contact: CHEN Guang-Jin

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937

被引次数

27 | 10

采用水中悬浮气泡法测定了温度为273.4～279.4 K、压力为3.60～11.90 MPa范围内甲烷微小气泡表面水合物膜生长动力学数据. 应用无因次Gibbs自由能差(－ΔGexp/RT)作为推动力, 提出了具物理意义的水合物膜生长动力学模型, 并回归得到甲烷水合物膜生长动力学反应级数为1.60, 表观活化能为55.95 kJ•mol－1, 指前因子为1.65×1011 mm2•s－1. 同时考察了温度和压力对甲烷水合物膜生长速率的影响.

关键词: 甲烷, 水合物, 悬浮气泡, 动力学, 活化能

Film growth kinetics data of methane hydrate were measured by a suspended gas bubble in water over the temperature and pressure ranges of 273.4～279.4 K and 3.60～11.90 MPa, respectively. The dimensionless Gibbs free energy difference (－ΔGexp/RT) was used as the driving force to correlate the experimental data and a model involving parameters of physical significance for hydrate film growth kinetics was proposed. The reaction order (n＝1.60), apparent activation energy (55.95 kJ•mol－1) and pre-exponential factor (1.65×1011 mm2•s－1) of methane hydrate film growth kinetics was regressed. Meanwhile the influences of temperature and pressure upon the film growth rate of methane hydrate were also discussed.

Key words: methane, hydrate, suspended bubble, kinetics, activation energy