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Prediction of methane-carbon dioxide-nitrogen gas hydrate equilibria: Recovery of methane from hydrate reservoirs and natural gas reservoirs.

机译:甲烷-二氧化碳-氮气天然气水合物平衡的预测:从水合物储层和天然气储层中回收甲烷。

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摘要

Because of the reported release of the CO2 emission into the atmosphere, it is needed to develop a new permanent CO2 method. In this study, the feasibility of a CO2 separation gas hydrate method has been tested and a new CO2 sequestration method in the form of hydrate slurry has been proposed. A program based on the Distortion model was used to predict equilibrium pressures of gas hydrates. Predicted values were obtained for three systems: carbon dioxide---nitrogen, methane---carbon dioxide, and methane---carbon dioxide---nitrogen. The equilibrium values for the CO2---N2 gas hydrate were obtained for a temperature interval of 273-283 K. These predicted values matched closely to published experimental results based on the phase diagram of N2-CO2 gas hydrate, the potential of a new separation method to remove from the flue gas has been verified Predicted hydrate-phase mole fractions for the CH 4---CO2 and CH4---CO2---N 2 systems give support to the feasibility of sequestering carbon dioxide in the hydrate structure. The results predict that methane may not be recovered from the hydrate. A new process of using hydrate slurry injection to recover natural gas from reservoirs was proposed as an alternative. This subject was explored with sample calculations, which can be improved if actual PVT conditions are known.
机译:由于据报道二氧化碳释放到大气中,因此有必要开发一种新的永久性二氧化碳方法。在这项研究中,测试了CO2分离气体水合物方法的可行性,并提出了一种以水合物浆液形式封存CO2的新方法。使用基于失真模型的程序来预测天然气水合物的平衡压力。获得了三个系统的预测值:二氧化碳---氮气,甲烷---二氧化碳和甲烷---二氧化碳-氮气。在273-283 K的温度区间内获得了CO2 --- N2气体水合物的平衡值。这些预测值与基于N2-CO2气体水合物的相图(一种新的潜力)发布的实验结果非常匹配。已证实从烟气中分离的分离方法预测的CH 4 --- CO2和CH4 --- CO2 --- N 2系统的水合物相摩尔分数为将二氧化碳隔离在水合物结构中的可行性提供了支持。结果预测甲烷可能无法从水合物中回收。提出了一种使用水合物注浆从储层中回收天然气的新方法。通过样本计算探索了该主题,如果知道实际的PVT条件,则可以进行改进。

著录项

  • 作者

    Amaya, Joseph A.;

  • 作者单位

    Texas A&M University - Kingsville.;

  • 授予单位 Texas A&M University - Kingsville.;
  • 学科 Engineering Chemical.
  • 学位 M.S.
  • 年度 2007
  • 页码 72 p.
  • 总页数 72
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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