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
Received date: 2005-08-12
Revised date: 2005-10-14
Online published: 2005-12-20
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
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.
Key words: Natural gas hydrate; Dynamics; Decomposition; Diffusion.
[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 CH4 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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