Lee, Junghyun and Lee, Hongju and Tan, Wen See and Chuah, Chong Yang and Tan, Ming Jen and Bae, Tae-Hyun and Song, Juha (2025) Enhancing CO2 capture efficiency using optimized 3D-Printed structured adsorbents. Separation and Purification Technology, 361 (3). ISSN 1383-5866, DOI https://doi.org/10.1016/j.seppur.2025.131495.
Full text not available from this repository.Abstract
3D-printed CO2 adsorbents hold significant promise for industrial applications but face challenges such as reduced efficiency due to binder use and limitations in scalability. This study builds on our previously developed binder-free 3D printing platform using brominated poly(2,6-dimethyl-1,4-phenylene oxide) (Br-PPO). Leveraging its advantages of high printability with low-viscosity liquid ink, post-printing flexibility, and high gas selectivity and stability, in this study, we aim to improve CO2 capture performance while maintaining compatibility with post-printing processes. Our approach employs three key strategies: (1) increasing the bromination level of PPO to improve intrinsic CO2 adsorption capabilities, (2) optimizing 3D adsorbent structures to enhance surface-tovolume ratios and packing density without disrupting post-printing processes, and (3) modularizing 3D-printed adsorbent building blocks to address scalability challenges. Increasing PPO bromination to 67 % improved CO2 adsorption capacity by 40 %, driven by the higher density of substituted amines introduced during post-printing amine-grafting. Structural optimization through customized mesh designs demonstrated that adsorbents with unevenly spaced filaments (MHh) achieved comparable CO2 capture efficiency to evenly spaced designs (MH), despite higher porosity, underscoring the role of structural optimization in enhancing adsorption efficiency while minimizing mass. Dynamic flow tests with 3D-printed adsorbent assemblies further validated the platform's effectiveness, demonstrating efficient CO2 capture at low flow rates (3 mm/min) without pressure drops and superior performance compared to activated carbon at equivalent volumes. These findings highlight the potential of 3D-printed adsorbents with tailored geometries as scalable solutions for CO2 capture, particularly in compact, energy-efficient applications such as advanced air purification systems and industrial gas separation processes.
| Item Type: | Article |
|---|---|
| Funders: | Academic Research Fund (AcRF) Tier 3 grant from the Ministry of Education (MOE) , Singapore [Grant No: MOE-MOET32022-0002], K -CHIPS (Korea Collaborative & High-tech Initiative for Prospective Semiconductor Research) - Ministry of Trade, Industry & Energy (MOTIE) , Korea [Grant No: 1415187710], National Research Foundation of Korea Ministry of Science & ICT (MSIT), Republic of Korea [Grant No: NRF- 2021M313A1084977], Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea [Grant No: 20011128] |
| Uncontrolled Keywords: | 3D printing; Amine grafting; CO 2 and gas adsorption; 3D structural configuration; Modular design |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 01 Oct 2025 01:46 |
| Last Modified: | 01 Oct 2025 01:46 |
| URI: | http://eprints.um.edu.my/id/eprint/47996 |
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