A compositional kinetic model of hydrate crystallization and dissolution
文献类型：期刊论文
| 作者 | Cathles, LM ; Chen, DF |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2004 |
| 卷号 | 109期号:B8页码:-B8124 |
| 关键词 | compositional kinetic model gas venting hydrate crystallization dissolution methane seafloor seep |
| ISSN号 | 0148-0227 |
| 通讯作者 | cathles@geology.cornell.edu |
| 中文摘要 | Hydrates are crystallizing near and at the seafloor from gas vents on shelves where the sedimentation rate is high and hydrocarbons are being generated. When seafloor temperature, vent rate, or vent gas composition changes, these hydrates may become unstable and decompose. We have constructed a compositional kinetic model of hydrate crystallization and dissolution that can address these issues. The model crystallizes hydrate in compositional bins and allows each to dissolve at either a kinetically or compositionally controlled rate if vent gas composition or temperature causes it to become unstable. We empirically calibrate the model to venting at the Bush Hill hydrate mound in the offshore Louisiana Gulf of Mexico, show how variations in venting rate crystallize hydrate of diverse composition in the subsurface, and investigate how bottom water temperature variations similar to those measured could increase the rate of gas venting by destabilizing hydrates within a few meters of the seafloor. We show that increases in bottom water temperature can cause gas venting rates to increase similar to100%, as suggested by recent measurements, only if the dissolution kinetics are fast compared to the empirically calibrated crystallization kinetics and dissolution gases are removed rapidly enough that they do not thermodynamically inhibit the rate of dissolution. Model characteristics required to further investigate hydrate mound construction are identified. |
| 学科主题 | Geochemistry & Geophysics |
| 收录类别 | SCI |
| 原文出处 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000223345000001 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4794]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Cathles, LM,Chen, DF. A compositional kinetic model of hydrate crystallization and dissolution[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2004,109(B8):-B8124. |
| APA | Cathles, LM,&Chen, DF.(2004).A compositional kinetic model of hydrate crystallization and dissolution.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,109(B8),-B8124. |
| MLA | Cathles, LM,et al."A compositional kinetic model of hydrate crystallization and dissolution".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 109.B8(2004):-B8124. |
入库方式： OAI收割
来源：南海海洋研究所
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