氢气水合物形成过程研究

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	氢气水合物形成过程研究
其他题名	Study on the hydrogen hydrate formation
	邓灿
导师	梁德青
	2009-05-27
学位授予单位	中国科学院广州能源研究所
学位授予地点	广州能源研究所
学位名称	硕士
关键词	氢气 Thf 环戊烷水合物储氢量
摘要	氢能，被视为21世纪最具发展潜力的清洁气体能源，是人类的战略能源发展方向，在未来具有广阔的应用前景。氢能的利用是一个新兴的行业，该行业涉及氢气的生产，储存，输送，燃料电池应用等方面。其中，氢气的储存技术在氢能经济中起制约作用。人们在传统的气体压缩、液化储氢方法的基础上，研究开发了多种新型储氢技术。其中水合物固态储氢技术作为一种很有前景的新的固态储氢方式，得到广泛关注和重视。本文在自行搭建的氢气水合物高压生成实验台上通过定容恒温法研究了氢气水合物在分别加入两种第二客体（四氢呋喃/环戊烷，浓度均为5.56mol%）时，在不同压力（10、12、14、16、18MPa）和温度（0、2、4℃）下的水合物形成特性，比较了两种不同的氢气水合物形成方法，具体为：⑴ 氢气-第二客体分子-水体系；⑵ 氢气-第二客体水合物颗粒体系，考察了形成过程，并计算了储氢量。最后对两个体系下的氢气水合物的形成机理进行了分析。实验结果表明：⑴ 在实验条件下，氢气均可以在两种方法下与第二客体一并形成双客体水合物；⑵ 储氢量均不超过1wt%，且与压力、温度正相关，随着压力/温度的增高而增高；⑶ 氢气-第二客体分子水合物颗粒体系下氢气水合物的生成速率明显快于氢气-第二客体分子-水体系；⑷ 在氢气-环戊烷水合物颗粒体系中，建立了氢气水合物扩散模型，并通过实验数据拟合出吸附系数和有效扩散系数数据，进而得出活化能，最高为77.5KJ/mol 。
其他摘要	Hydrogen is viewed as the most potential and clearest gas energy, which is the direction for the energy future developing and has a very huge application prospect. The application of hydrogen is a new field which is involved in production, storage, translation, fuel-cell application and so on. Especially, the storage of hydrogen is the restrictive factor in hydrogen economy. The traditional storage methods of hydrogen by compressing and liquefaction can not satisfy the requirement of application. Therefore, attention is currently focused on the new hydrogen storage technology. And the hydrate as the solid storage material namely clathrate hydrogen hydrates opens a new direction for hydrogen storage. In this thesis, a new equipment for the hydrogen hydrate formation in high pressure was built, and the formation of hydrate in H2/the second guest (THF/ cyclopentane, both in 5.56mol% )/water system without stirring in a constant volume was studied under the condition of different pressures (10,12,14,16,18MPa) and temperature (0,2,4℃) respectively. And two different formation methods of the hydrogen hydrate were compared: (1) in H2-the second guest-water sulotion system; (2) in H2-the second guest hydrates powder system. The formation processes in the two systems were investigated and the amounts of hydrogen stored in the clathrate hydrates were calculated. The formation mechanism of hydrogen clathrate hydrate in two systems was analyzed. The results show that: (1) under the experimental conditions, the hydrogen hydrate could both be formed in two methods. (2) capacities of hydrogen in all experiments didn’t exceed 1wt%, which were improved by the pressure/temperature growing. (3) the formation rate in H2-the second guest hydrates powder system was faster than in H2-the second guest-water sulotion system obviously. (4) in H2-the second guest hydrate powder system, the hydrogen hydrate phase diffusion model was built. According to the experimental data, the adsorption coefficient and effective diffusion coefficient could be simulated, and the acticatin energies were caculated, the maximum could reach 77.5KJ/mol .
页数	85
语种	中文
文献类型	学位论文
条目标识符	http://ir.giec.ac.cn/handle/344007/5844
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	邓灿. 氢气水合物形成过程研究[D]. 广州能源研究所. 中国科学院广州能源研究所,2009.

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