Volume 136, Issue 1 e202315607
Forschungsartikel

Ultrapermeable Gel Membranes Enabling Superior Carbon Capture

Bin Zhu

Bin Zhu

State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 China

Search for more papers by this author
Yan Yang

Yan Yang

State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 China

Search for more papers by this author
Lei Guo

Lei Guo

State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 China

Search for more papers by this author
Kaifang Wang

Kaifang Wang

Department of Chemical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, 515063 China

Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063 China

Search for more papers by this author
Yanqiu Lu

Yanqiu Lu

Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585 Singapore

Search for more papers by this author
Xuezhong He

Xuezhong He

Department of Chemical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, 515063 China

Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063 China

Search for more papers by this author
Sui Zhang

Sui Zhang

Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585 Singapore

Search for more papers by this author
Lu Shao

Corresponding Author

Lu Shao

State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 China

Search for more papers by this author
First published: 20 November 2023

Abstract

Membrane technology is rapidly gaining broad attraction as a viable alternative for carbon capture to mitigate increasingly severe global warming. Emerging CO2-philic membranes have become crucial players in efficiently separating CO2 from light gases, leveraging their exceptional solubility-selectivity characteristics. However, economic and widespread deployment is greatly dependent on the boosted performance of advanced membrane materials for carbon capture. Here, we design a unique gel membrane composed of CO2-philic molecules for accelerating CO2 transportation over other gases for ultrapermeable carbon capture. The molecular design of such soft membranes amalgamates the advantageous traits of augmented permeation akin to liquid membranes and operational stability akin to solid membranes, effectively altering the membrane's free volume characteristics validated by both experiments and molecular dynamics simulation. Surprisingly, gas diffusion through the free-volume-tuned gel membrane undergoes a 9-fold improvement without compromising the separation factor for the superior solubility selectivity of CO2-philic materials, and CO2 permeability achieves a groundbreaking record of 5608 Barrer surpassing the capabilities of nonfacilitated CO2 separation materials and exceeding the upper bound line established in 2019 even by leading-edge porous polymer materials. Our designed gel membrane can maintain exceptional separation performance during prolonged operation, enabling the unparalleled potential of solubility-selective next-generation materials towards sustainable carbon capture.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.