含四氢呋喃或叔丁胺体系水合物生成实验研究
文献类型：学位论文
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| 作者 | 王东雷 |
| 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 |
| 关键词 | 混合水合物 添加剂 四氢呋喃 叔丁胺 储气 |
| 其他题名 | Hydrate Formation in a System with Tetrahydrofuran or Tert-butylamine |
| 中文摘要 | Natural gas hydrates(NGHs) are nonstoichiometic clathrate crystalline compounds that are formed by physically stable interaction between water and relatively small guest molecules at high-pressure and low-temperature conditions. Now NGHs are regarded as a potential energy source. In addition, many new applied technologies are developed. In order to widen the applications of these technologies we can change the thermodynamic conditions and kinetic characteristics of hydrates through adding additives such as tetrahydrofuran(THF), sodium dodecyl sulfate(SDS) and so on. In this thesis, a new equipment for the thermodynamic and kinetic researches of gas hydrate was designed and built. In this equipment a series of experiments about the formations of hydrate in a synthetic nature gas(methane 91.9 mol %, ethane 5.11 mol %, propane 2.99 mol %)-THF-water system were carried. The hydrate disappearance conditions in this system were measured, and the influences of the temperature and initial pressure on the formation of the hydrate were investigated by the constant volume method. In addition, the influences of the temperature, the pressure, the initial reaction quantity and the tert-butylamine(tBuNH2) concentration in reactant solution on the formation of the hydrate in a methane- tBuNH2-water system were investigated by constant temperature and precooling method. The results showed that the new equipment can be used to measure hydrate disappearance conditions of gas hydrate. The equilibrium pressures of hydrate in the synthetic nature gas-water system were reduced when THF had been added to this system, and when THF concentration in reactant solution was 5.6 mol % the reduction was largest. The hydrate in the synthetic nature gas-THF-water system was structure II mixed hydrate, and THF mainly occupied the large cages of sII hydrate.Two hydrate structures, pure tBuNH2 Structure VI and methane/tBuNH2 Structure II, may form simultaneously in the methane- tBuNH2-water system. It is considered that hydrate formation mechanism in synthetic nature gas-THF-water system may undergo three steps: gas dissolving, nucleation and growing of hydrate, and hydrate formation mechanism in methane- tBuNH2-water system may also undergo three steps: contacting and gathering of reactants molecules, forming of hydrate framework, and growing of hydrate. For synthetic nature gas-THF-water system, induction time of the hydration reaction increased when the temperature decreased, and decreased linearly when initial pressure increased, the rate of hydrate formation and the final gas storage capacity increased when the temperature decreased, and increased when initial pressure increased. For methane- tBuNH2-water system, induction time of the hydration reaction decreased when the temperature decreased, and decreased when the pressure increased, the rate of hydrate formation with CH4 increased when the temperature or the pressure increased. For this system, the final gas storage capacity increased when the temperature decreased, at the constant temperature, the final gas storage capacity increased scarcely when the pressure increased while tBuNH2 concentration in reactant solution was 9.3 mol % and 30.0 sample was loaded in the reactor, and decresed when the pressure increased while tBuNH2 concentration in reactant solution was 9.3 mol % and 100.0 sample was loaded in the reactor. For this system, the final gas storage capacity increased remarkably when tBuNH2 concentration in reactant solution reduced as 5.6 mol %. In this thesis, THF and tBuNH2 were selected as additives, the thermodynamic conditions and kinetic processes of hydrates in synthetic nature gas-THF-water system and methane- tBuNH2-water system were studied. The results can provide base datas to the developments of applied technologies about gas hydrate. |
| 语种 | 中文 |
| 公开日期 | 2011-07-14 ; 2011-07-15 |
| 页码 | 73 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/5780]  |
| 专题 | 中国科学院广州能源研究所 |
| 推荐引用方式 GB/T 7714 | 王东雷. 含四氢呋喃或叔丁胺体系水合物生成实验研究, Hydrate Formation in a System with Tetrahydrofuran or Tert-butylamine[D]. 广州能源研究所. 中国科学院广州能源研究所. 2008. |
入库方式： OAI收割
来源：广州能源研究所
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