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题名	A型分子筛对THF和甲烷水合物生成及分解过程的影响; Effects of type A Molecular Sieve on THF Hydrate and Methane
作者	臧小亚
学位类别	硕士
答辩日期	2008-06-04
授予单位	中国科学院广州能源研究所
授予地点	广州能源研究所
导师	樊栓狮/梁德青
关键词	水合物 分子筛 生成 分解
其他题名	Effects of type A Molecular Sieve on THF Hydrate and Methane
中文摘要	Nowadays, new technologies based on hydrate have been made significant progress not only in energy and environmental domains, but also in other practical fields. How can improve the hydrate formation rate and increase the gas storage capacity effectively are the problems that urgently need to be solved. The experimental study on the formation and dissociation process of tetrahydrofuran(THF) hydrate and methane hydrate using 3A and 5A molecular sieve as additives were performed. And the formation and decomposition phenomenon and characteristic in single molecular sieve were observed by microscope. The effects of type A molecular sieve on formation and dissociation process of hydrate were obtained from microscopic and macroscopic aspects. The experiment results show that 3A molecular sieve can promote THF hydrate production process significantly. The presence of 3A molecular sieve can induce the hydrate nucleation, improve THF hydrate production and increase the formation rate. (1)The THF hydrate crystal growth velocity is situated between 0.01µm/s and 0.05µm/s with 3A molecular sieve powder exist, and the crystal growth velocity increases with environment temperature decrease at the identical condition;(2) Compared with the system without 3A molecular sieve powder ,the adding 3A molecular sieve powder in THF-water system can promote THF hydrate formation. The increment of the crystal growth velocity is about 0.004µm/s. (3)3A molecular sieve’s join can obviously reduce the solution temperature of THF hydrate, the reduces range was approximately about 0.6℃.(4)There are still some changes partly and structure reorganization in megacryst of THF crystal when the THF crystal have grown up basically at the same experimental condition. And the THF hydrate formation velocity has consistent law with different temperature.In other words; the effect on the experimetal temperature is little. The maximum velocity is approximately 1.1 µ m/s, and the contact surface growth velocity decreases slowly with the reaction carries on. The formation experiments of methane hydrate indicate that: (1) because the adding molecular sieve can promote hydrate formation, methane hydrate was formed in pure water at 1 centigrade and 8.3MPa. The hydrate formation process adding 3A molecular sieve was very stable and the variation of pressure/temperature are not obvious, (2) the proper quantity of molecular sieve has significant influence on gas storage capacity of methane hydrate, otherwise it can reduce gas storage capacity.The increment of gas storage capacity rate is about 31%, The results of this paper have significant achievements on as follow aspects, research of the hydrate growth and dissociation characteristics, development of adsorption-hydration mutual coupling gas storage and separation technology and strengthen the coupling process in milli-nano scale, thus it can promote gas hydrate storage industrial applications.
语种	中文
公开日期	2011-07-14 ; 2011-07-15
页码	77
内容类型	学位论文
源URL	[http://ir.giec.ac.cn/handle/344007/5796]
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	臧小亚. A型分子筛对THF和甲烷水合物生成及分解过程的影响, Effects of type A Molecular Sieve on THF Hydrate and Methane[D]. 广州能源研究所. 中国科学院广州能源研究所. 2008.

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