注化学试剂分解丙烷水合物实验模拟研究
文献类型：学位论文
| ; | |
| 作者 | 董福海 |
| 学位类别 | 博士 |
| 答辩日期 | 2009-01-05 |
| 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 | 注化学试剂 热激 丙烷 分解 丙烷水合物 |
| 其他题名 | Experimental Simulation Study on Propane Hydrate Dissociation by Chemical Reagents Injection |
| 中文摘要 | Natural gas hydrates (NGH) is a greatly potential alternative energy resource, which has of high quality and burns clean. NGH has attracted more and more concern by many countries.On the one hand, the method of chemical reagents stimulation is one of the potential methods have been employed to exploit NGH with respect to different conditions.On the other hand, NGH has resulted in great effects on the petroleum industry. In order to keep the pipeline in the safe region the method of chemical reagents stimulation has been studied throughout the world. In this article, the method of chemical reagents stimulation has been developed. Firstly study on the formation of propane hydrate was investigated, which provide conditions for gas hydrate dissociation by chemical reagents injection. And determination of hydrate dissociation heat by mixing calorimetry was studied. Based on the propane hydrate dissociation experiments by heat stimulation, the dissociation experiments by chemical reagents injection were carried out, which are the key point of this study. The above-mentioned experimentals give rises to a series of conclusions as follows: The formation process of propane hydate has been divided into four parts, including induction period, fast dissociation period, slow dissociation period, and the end of dissociation period. A method based on the mixing calorimetry for determination of hydrate dissociation heat was introduced. The simulation experiment with a surface heat exchanger was carried out. The dissociation process can divide into two stages: release gas stage and dissociation epilogue stage.Average dissociation rate was about 0.16-0.46 mol•min-1•m2, energy efficiency was between 1.33 and 3.74. At release gas stage average dissociation rate was 0.27-2.56 mol•min-1•m2, energy ratio was between 2.25 and 5.58. There is an optimizing thermal dissociation temperature which can not only increase hydrate dissociation velocity rate, but also improve energy ratio and save energy. The dissociation behaviors of propane hydrate were investigated by different concentration, temperature and injecting flux chemical reagents injection. The chemical reagents including methanol, ethylene glycol, glycerin, potassium permanganate can accelerate gas hydrate dissociation and reduces the total need of external energy to dissociate the hydrates. It should be noted that increasing the different concentration, temperature and injecting flux of alcohols offers faster propane hydrate dissocation rate. Density differences act as driving force, causing the acceleration effects of ethylene glycol on dissociation behavior of propane hydrate is better than that acted by methanol with the same mass concentration. And there is an inflection point at concentration of 60.1wt%. When the mass concentrations exceed 60.1 wt %, the difference between the average dissociation rates becomes more visible gradually after injecting solution of ethylene glycol and methanol respectively. Based on the experimental study, the two models of dissociation kinetics and heat transfer were established. The simulation results were consistent with the experiments ones comparatively well. Study on propane hydrate dissociation by chemical reagents stimulation has been developed. Many experimental data had been obtained, while some important dissocation rules were discovered. There are certain significance in the aspects of both NGH exploitation and NGH inhibition in pipeline. |
| 语种 | 中文 |
| 公开日期 | 2011-07-10 ; 2011-07-15 |
| 页码 | 117 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/4063]  |
| 专题 | 中国科学院广州能源研究所 |
| 推荐引用方式 GB/T 7714 | 董福海. 注化学试剂分解丙烷水合物实验模拟研究, Experimental Simulation Study on Propane Hydrate Dissociation by Chemical Reagents Injection[D]. 广州能源研究所. 中国科学院广州能源研究所. 2009. |
入库方式： OAI收割
来源：广州能源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。