...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of natural gas science and engineering >Experimental study on methane hydrate formation in quartz sand under tri-axial condition
【24h】

Experimental study on methane hydrate formation in quartz sand under tri-axial condition

机译：三轴条件下石英砂中甲烷水合物形成的实验研究

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

Methane hydrate (MH) has been considered as one of the cleanest energy resources. Its huge resource reserve and high energy density have attracted widespread attention in the scientific field. The dynamic behavior of MH formation and the resulting hydrate saturation are greatly influenced by the conditions of the formation process, such as water-gas ratio (WGR), pressure (P), temperature (T), and the mass fraction of NaCl (X-NaCl). To gain a better understanding of the kinetic behavior of the in-situ MH deposits, a novel trTaxial horizon fixed bed reactor was set up to synthesize MH samples under typical marine conditions. A series of MH formation experiments were conducted under similar initial stress conditions (initial trTaxial stress of 16.50 MPa to simulate the overburden stress of marine MH) while perturbing the other key factors (WGR, P, T, and X-NaCl) to investigate their effects. The results show that MH saturation attained at the end of formation from an initial water-gas mixing condition was negatively affected by initial WGR, T, and the existence of NaCl. MH formation in the fixed bed reactor increases initial X-NaCl = 3.0 wt% to a maximum of X-NaCl = 5.29 wt% and shifts the MH equilibrium curve to a more stringent condition for MH formation. Higher pressure promotes CH4 conversion to MH and increases MH saturation from the start of gas injection to the time when the pressure of the reactor was stable (Delta P < 20 kPa/h). Larger initial WGRs (above MH hydration number = 5.75) and higher pressures result in a reduction of the induction time. Increasing temperature and the presence of NaCl increase the induction time.
机译：甲烷水合物（MH）被认为是最清洁的能源之一。其巨大的资源储量和高能量密度引起了科学界的广泛关注。MH形成的动力学行为和由此产生的水合物饱和度很大程度上受形成过程的条件影响，例如水-气比（WGR）、压力（P）、温度（T）和NaCl的质量分数（X-NaCl）。为了更好地了解原位MH沉积物的动力学行为，建立了一种新型的固定床反应器，用于在典型海洋条件下合成MH样品。在类似的初始应力条件下（初始应力为16.50 MPa，以模拟海洋MH的上覆应力），同时扰动其他关键因素（WGR、P、T和X-NaCl）进行了一系列MH地层实验，以研究其影响。结果表明，在初始水-气混合条件下，在地层结束时获得的MH饱和度受到初始WGR、T和NaCl存在的负面影响。固定床反应器中的MH生成将初始X-NaCl=3.0 wt%增加至最大X-NaCl=5.29 wt%，并将MH平衡曲线移动至更严格的MH生成条件。较高的压力促进CH4转化为MH，并增加从气体注入开始到反应器压力稳定（Delta P<20 kPa/h）期间的MH饱和度。较大的初始WGR（高于MH水合数=5.75）和较高的压力会导致诱导时间缩短。温度升高和NaCl的存在增加了诱导时间。

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