• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Macroscopic Observations of Catastrophic Gas Hydrate Growth during Pipeline Operating Conditions with or without a Kinetic Hydrate Inhibitor
【24h】

Macroscopic Observations of Catastrophic Gas Hydrate Growth during Pipeline Operating Conditions with or without a Kinetic Hydrate Inhibitor

机译：有或没有动力学水合物抑制剂的管道运行条件下的灾难性天然气水合物生长的宏观观察

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents the macroscopic observation of catastrophic gas hydrate growth during a shut-in, cold start-up and flowing conditions, simulating a natural gas transmission line operation. All experiments are conducted with a fixed simulated natural gas composition to form structure II gas hydrate with 11 K subcooling in the isochoric rocking cells. In order to simulate inhibited test systems, a formulated copolymer of vinylpyrolidone and vinylcaprolactam (PVP/PVCap) is included in some of the cells studied. Detailed macroscopic images and interpretation of pressure (P) and temperature (T) data are used to present our findings. It is found that production profiles such as different shut-in time and the mechanism of mass transfer of water from the bulk water phase to gas hydrate phase influence the gas hydrate growth in distinctive ways. Moreover, the capillary force in the gas hydrate structure may provide a greater driving force to promote gas hydrate growth than the diffusion rate of gases into the bulk water phase under shut-in and cold-start up conditions. Additionally, the number of critical nuclei formed during the initial stage of gas hydrate growth may influence the type of bulk gas hydrate present in the system at a later stage, i.e., finely dispersed hydrates or a slush type of gas hydrate.
机译：本文提出了在关闭，冷启动和流动条件下灾难性天然气水合物生长的宏观观察，模拟了天然气传输线的运行。所有实验均采用固定的模拟天然气成分进行，以在等速摇摆池中过11 K过冷形成II型结构的天然气水合物。为了模拟受抑制的测试系统，一些研究的电池中包含乙烯基吡咯烷酮和乙烯基己内酰胺的配制共聚物（PVP / PVCap）。详细的宏观图像以及对压力（P）和温度（T）数据的解释被用来介绍我们的发现。发现生产曲线，例如不同的关闭时间以及水从本体水相到水合物水相的质量转移机理，以独特的方式影响着水合物的生长。此外，与在关闭和冷启动条件下气体向本体水相的扩散速率相比，气体水合物结构中的毛细作用力可以提供更大的驱动力来促进气体水合物的生长。另外，在气体水合物生长的初始阶段形成的临界核的数目可能影响在较晚阶段存在于系统中的本体气体水合物的类型，即细分散的水合物或泥浆形式的气体水合物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号