逸度
膜
水合物
氢
化学
笼状水合物
联轴节(管道)
渗透
膜技术
分离过程
气体分离
传质
动力学
工作(物理)
化学工程
热力学
色谱法
材料科学
物理化学
有机化学
工程类
物理
冶金
量子力学
生物化学
作者
Qiang Sun,Gaoqiang Yuan,Zheng Liu,Jingbo Gao,Yiwei Wang,Xuqiang Guo,Lanying Yang
标识
DOI:10.1016/j.ijhydene.2022.02.212
摘要
Recovery of hydrogen (H2) from H2-containing gas mixtures has great significance for energy conservation, cost reduction and benefit increase. However, the common separation methods have the ubiquitous problem due to phase equilibrium principle and results in the conflict between H2 concentration and H2 recovery rate in the product gas. Consequently, an innovative conception of hydrate-membrane coupling approach is proposed in this work. In the separation process, hydration and membrane permeation two separation driving forces coexist to achieve the aim of strengthening mass transfer kinetics. H2 and non-H2 components (hydrocarbons) are synchronously and directionally selected by membrane and hydrate to improve different phase compositions. Therefore, the gas in feed side could keep relatively high two separation driving forces (H2 fugacity and hydrocarbons fugacity). The results show that the coupling method could synchronously increase both the concentration and the recovery rate of H2 in the product gas. At the same time, the volume and concentration of the hydrocarbons in hydrate both increases effectively. It indicates that hydrate and membrane separation methods support each other in the separation process. The hydrate-membrane coupling method fundamentally solves the issue of the decreasing driving force resulting from single separation method and phase equilibrium relationship.
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