Analysis of Gas Source for the Replacement of CH4 with CO2 in Gas Hydrate Production from the Perspective of Dissociation Enthalpy,Journal of Chemical & Engineering Data

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Analysis of Gas Source for the Replacement of CH4 with CO2 in Gas Hydrate Production from the Perspective of Dissociation Enthalpy
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2018-02-15 00:00:00 , DOI: 10.1021/acs.jced.7b00872
Shicai Sun _{1,

2} , Yuchao Hao ₁ , Jianrui Zhao ₁

Affiliation

The dissociation enthalpies of CH₄ hydrate, CO₂ hydrate, and CO₂–N₂ mixture gas hydrate in the simulated submarine environment were calculated using their phase equilibrium data and the Clausius–Clapeyron equation. The results show that the dissociation enthalpy is related to the hydrate stability; that is, the ions in salt solution or seawater can reduce the dissociation enthalpy, while the effect of sediments on the dissociation enthalpy depends on the particle size in that the dissociation enthalpy is lower in sediments with smaller particle size. From the perspective of dissociation enthalpy, flue gas from a power plant can be directly used as the CO₂ gas source for the replacement of methane in natural gas hydrate production, with the addition of a trace of tetrabutyl ammonium bromide (TBAB) additive without the use of pure CO₂, so as to meet the required heat of CH₄ hydrate exploitation and save energy for separating CO₂ in flue gas.

中文翻译：

从分解焓的角度分析天然气水合物生产中CO ₂替代CH ₄的气源

利用它们的相平衡数据和Clausius-Clapeyron方程，计算了模拟海底环境中CH ₄水合物，CO ₂水合物和CO ₂ -N ₂混合气体水合物的离解焓。结果表明，离解焓与水合物的稳定性有关。也就是说，盐溶液或海水中的离子可以降低离解焓，而沉积物对离解焓的影响取决于粒径，因为粒径较小的沉积物中离解焓较低。从分解焓的角度来看，发电厂的烟气可以直接用作CO _2。气源，用于天然气水合物生产中的甲烷替代，并添加痕量的四丁基溴化铵（TBAB）添加剂而不使用纯CO ₂，从而满足CH ₄水合物开采所需的热量并节省能源用于分离烟气中的CO ₂。

更新日期：2018-02-16

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