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Experimental and modelling study on characteristics of thermodynamic phase equilibrium of helium-rich natural gas hydrates
- Low-Carbon Chemistry and Chemical Engineering Vol. 51, Issue 2, Pages: 127-136(2026)
- 作者机构：
1.中国石油大学（北京）克拉玛依校区 重质油全国重点实验室分室，新疆 克拉玛依 834000
2.中国石油大学（北京） 重质油全国重点实验室，北京 102249
3.辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250363
CLC： TE6;TE8Received：05 September 2025，
Revised：2025-09-30，
Published：25 February 2026
- 稿件说明：
移动端阅览
王逸伟,陈海鑫,刘曾奇等.富氦天然气水合物热力学相平衡特性的实验与模型研究[J].低碳化学与化工,2026,51(2):127-136.
WANG Yiwei,CHEN Haixin,LIU Zengqi,et al.Experimental and modelling study on characteristics of thermodynamic phase equilibrium of helium-rich natural gas hydrates[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):127-136.
王逸伟,陈海鑫,刘曾奇等.富氦天然气水合物热力学相平衡特性的实验与模型研究[J].低碳化学与化工,2026,51(2):127-136. DOI： 10.12434/j.issn.2097-2547.20250363.
WANG Yiwei,CHEN Haixin,LIU Zengqi,et al.Experimental and modelling study on characteristics of thermodynamic phase equilibrium of helium-rich natural gas hydrates[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):127-136. DOI： 10.12434/j.issn.2097-2547.20250363.
摘要
无论是富氦天然气（HNG）的开采和运输，还是水合物法提氦（He）新技术的研发，其涉及的气-液体系均存在多种能生成水合物的组分，这些组分产生的影响可互相叠加，导致HNG水合物临界生成压力（
p
eq
）难以预测。为了解决这一问题，通过热力学相平衡实验，研究了气相中He、氮气（N
2
）和二氧化碳（CO
2
）体积分数，以及液相中四氢呋喃（THF）质量分数对HNG的
p
eq
的影响，并在此基础上建立了适用于HNG的
p
eq
预测模型。结果表明，随He体积分数增大，THF降低
p
eq
的效果越显著；随N
2
体积分数持续增大，THF降低
p
eq
的效果起初基本不变，之后变得显著；随CO
2
体积分数持续增大，THF降低
p
eq
的效果起初轻微减弱，之后基本不变；CO
2
对气体水合物生成的正面作用强于甲烷（CH
4
），但对THF水合物生成的正面作用略弱于CH
4
。模型表现出良好的预测性能，其对
p
eq
的预测值与实验值的平均相对误差为2.6%，各气-液体系的水合物临界生成温度-压力曲线的可决系数均大于0.965。
Abstract
In both the extraction and transportation of helium-rich natural gas (HNG) and the development of the new hydrate-based helium (He) separation technology
the gas-liquid systems involved in the fields always have the components that can form hydrate. The combination of the effects of those components on hydrate formation makes it hard to achieve the accurate prediction of the critical formation pressure (
p
eq
) of HNG hydrate. To solve the problem
the effects of the volume fractions of He
nitrogen (N
2
) and carbon dioxide (CO
2
) in gas phase
as well as the mass fraction of tetrahydrofuran (THF) in liquid phase on
p
eq
were investigated through the thermodynamic phase equilibrium experiments. Based on the experimental investigation
a new model which
can predict the
p
eq
was proposed. The results show that the performance of THF on decreasing
p
eq
becomes more significant as the volume fraction of He increases. As the volume fraction of N
2
continuously increases
the performance of THF on decreasing
p
eq
keeps constant at first then increases. As the volume fraction of CO
2
continuously increases
the performance of THF on decreasing
p
eq
becomes slightly weak at first then keeps constant. The positive effect of CO
2
on gas hydrate formation is stronger than that of methane (CH
4
)
whereas the positive effect of CO
2
on THF hydrate formation is weaker than that of CH
4
. The modeling results show good accuracy on predicting
p
eq
with the average relative deviation between the modeling
p
eq
and experimental
p
eq
of 2.6%
and the fit goodness of of the critical hydrate formation temperature-pressure curve of each gas-liquid system is higher than 0.965.
关键词
Keywords
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