非常规天然气:水合物气

甲烷水合物分解的缩粒动力学模型

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  •  西安交通大学能源与动力工程学院,陕西 西安710049
何晓霞(1981-),女,甘肃平凉人,硕士研究生,主要从事天然气水合物分解动力学及物化特性的研究.E-mail:furongliu@sina.com.cn.

收稿日期: 2005-08-12

  修回日期: 2005-10-14

  网络出版日期: 2005-12-20

基金资助

国家自然科学基金项目(编号:40272064)资助.

PARTICLE SHRINKING DYNAMIC MODEL FOR METHANE HYDRATE DECOMPOSITION

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  • School of Energy and Power Engineering, Xi'an Jiaotong  University, xi'an 710049, China

Received date: 2005-08-12

  Revised date: 2005-10-14

  Online published: 2005-12-20

摘要

将温度在零度以上的甲烷水合物的分解过程看作是无固态产物层生成的气固反应,从晶体溶解的角度研究了水合物颗粒的消融问题,推导了颗粒半径随反应时间变化的微分方程,从理论上建立了甲烷水合物分解的缩粒动力学模型。利用前人的实验数据,进行了水合物分解的动力学分析,认为温度在零度以上时,水合物分解反应由界面化学反应过程控制。将实验数据代入模型拟合了甲烷水合物分解反应的活化能E a和表观分解速率常数kr与文献值误差较小。

本文引用格式

何晓霞,余劲松,马应海,张淑萍,刘芙蓉 . 甲烷水合物分解的缩粒动力学模型[J]. 天然气地球科学, 2005 , 16(6) : 818 -821 . DOI: 10.11764/j.issn.1672-1926.2005.06.818

Abstract

When the temperature is above zero centigrade, methane hydrate decomposition can be regarded as a gas-solid reaction without solid production layer. From crystal dissolution angle, the paper studied on hydrate particle shrinking problem.The paper related particle radius to reaction time with a differential equation and thus built a particle shrinking model of methane hydrate decomposition. Dynamics analysis was done by use of experimental data from the literature, which indicated that interface chemical reaction was the control of the process. Global reaction velocity constant and the activation energy of methane hydrate decomposition. The results from the model match the experimental data perfectly showing that the model is of high reliability.

参考文献

  [1]王胜杰,韩小辉,郝妙莉,等.冰点以下天然气水合物的生成动力学研究[J].天然气地球科学,2001,12(1):27-31.
[2] 潘云仙,刘道平,黄文件,等.气体水合物形成的诱导时间及其影响因素,天然气地球科学,2005,16(2):255-260.
[3] Kamath V A,Holder G D,Angert P F.Three phase interfacial heat transfer during the dissociation of propane hydrates[J]. Chem Eng Sci,1984, 39(10):1435-1442.
[4] Kim H C, Bishnoi P R, Heidemann R A. Kinetics of Methane hydrate Decomposition[J]. Chem Eng Sci,1987,42(7):1645-1653.
[5] Selim M S, Sloan E D.Heat and Mass Transfer During the Dissociation of Hydrates in Porous Media[J]. AICHE J, 1989, 35(6):1049-1052.
[6] Bischoff K B.Accuracy of the pseudo state approximation for moving boundary diffusion problems[J]. Chem Eng Sci, 1963,18:711.
[7] Wen C Y.Noncatalytic heterogeneous solid fluid reaction models[J]. Ind Eng Chem., 1968, 60 (9) :34.
[8] Satoshi Takeya, Takao Ebinuma, Tsutomu Uchida, et al.Self-preservation effect and dissociation rates of CH4 hydrate[J].Journal of Crystal Growth, 2002,237-239,379-382.
[9] 孙长宇, 陈光进, 郭天民.甲烷水合物恒温恒压分解过程研究[J].地球化学,2003,2(3):112-116.
[10] Makogon Y F.Hydrates of Natural Gas (2nd Edition)[M]. Tulsa, Oklahoma:PennWellublishing company, 1981,106-109.

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