Regulating the Growth Orientation of ZIF‐L Membrane for H2/CO2 Separation
Shenzhen Cong, Si Sun, Yijing Zhang, Ming Wang, Zhehua Jia, Youhua Zhao, Huan PangAbstract
Metal–organic framework (MOF) membranes offer a wide range of applications, including simultaneous hydrogen generation and decarbonization. The permselectivity of gas molecules can be considerably increased by optimizing the oriented of MOF membranes, and it is possible to construct MOF membranes with high permeance and high selectivity. Here, chelation‐assisted interfacial growth is used to prepare ZIF‐L membranes for H2/CO2 separation. The growth rate of the ZIF‐L crystal plane is regulated by optimizing the interface Zn2+ diffusion, and a ZIF‐L membrane with preferred orientation is constructed for efficient separation of H2/CO2. The optimized ZIF‐L membrane has an H2 permeance of over 2000 GPU, and the H2/CO2 selectivity exceeds 30. Additionally, the prepared ZIF‐L membrane exhibits outstanding operating stability and tolerance, making it a promising candidate for industrial applications.