Thermodynamic Promotion of Tetrahydrofuran on Methane Separation from Low-Concentration Coal Mine Methane Based on Hydrate
Thermodynamic Promotion of Tetrahydrofuran on Methane Separation from Low-Concentration Coal Mine Methane Based on Hydrate
复制标题
四氢呋喃水合物分离低浓度煤矿瓦斯甲烷的热力学促进
DOI：
10.1021/ef901446n
复制
发表时间：
2010-04-01
期刊：
影响因子：
5.3
通讯作者：
Wu, Qiang
中科院分区：
文献类型：
--
作者：
Zhang, Baoyong;Wu, Qiang
本文提出了一种新的基于水合物的气体分离（HBGS）方法，特别适用于从低浓度煤矿瓦斯（CMM）中回收甲烷。本研究的主要目的是评估四氢呋喃（THF）对低浓度煤层气回收甲烷的热力学促进作用。在天然气水合物系统 (CH4−N2−O2−THF−H2O) 和各种初始操作压力（8、10 和 14 MPa）下，仔细研究了各种不同 THF 浓度（1.00、0.10 和 0.01 mol L−1）下水合物初始形成（蒸气−水液−水合物）的温度和压力条件。随后，利用 Chen−Guo 模型和 Patel−Teja 状态方程计算了 CH4−N2−O2−H2O 体系水合物形成的相平衡参数。实验值与计算值之间的差异表明，THF 的添加显着降低了平衡形成条件。 THF 浓度和初始操作压力越高，...
This paper proposed a new hydrate-based gas separation (HBGS) method especially for recovering methane from low-concentration coal mine methane (CMM). The main purpose of this study was to evaluate the thermodynamic promotion of tetrahydrofuran (THF) on methane recovery from low-concentration CMM. Temperature and pressure conditions for incipient hydrate formation (vapor−aqueous liquid−hydrate) were closely examined at various different THF concentrations (1.00, 0.10, and 0.01 mol L−1) in gas hydrate systems (CH4−N2−O2−THF−H2O) and at various initial operating pressures (8, 10, and 14 MPa). Subsequently, the phase equilibrium parameters of hydrate formation for the CH4−N2−O2−H2O system were calculated using the Chen−Guo model and the Patel−Teja equation of state. The difference between experimental and calculated values indicates that the addition of THF significantly reduced the equilibrium formation conditions. The higher the THF concentration and the initial operation pressure, the more significant the...