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Membrane-based CO2 capture for post combustion
박호범 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Investigating new methods and reliable technologies competing with conventional industrial processes for CO2 capture and recovery such as absorption and adsorption is a great challenge in the current research. Generally conventional separation processes do not meet the present approach of process intensification but still has merit due to their maturity in technology and large-scale implementation. On the other hand, membrane-based gas separation technology is under active development aiming at advancing towards sustainable systems that minimizes CO2 emissions with many promising advantages such as simple design, small foot print and easy scale-up. However, existing polymeric membranes suffer from relatively low CO2 permeability and CO2/N2 selectivity, and also the presence of water vapor in the feed streams. This presentation will give a general view of the recent achievements for those systems and the main limitations and challenges to be faced will be presented with addressing the next steps that should be considered to advance as fast as possible towards realistic solutions for CO2 capture.
박호범,장준규,윤채원 한국막학회 2023 멤브레인 Vol.33 No.1
In this review, surface modification methods of hydrophobic poly(tetrafluoroethylene) (PTFE) membrane are introduced and their improved hydrophilicity results are discussed. Fluoropolymer based membranes, represented by PTFE membranes have been used in various membrane separation processes, including membrane distillation, oil separation and gas separation. However, despite excellent physical properties such as chemical resistance, heat resistance and high mechanical strength, the strong hydrophobicity of PTFE membrane surface has become a challenging factor in expanding its membrane separation application. To improve the separation performance of PTFE membranes, wet chemical, hydrophilic coating, plasma, irradiation and atomic layer deposition are applied, modifying the surface property of PTFE membranes while maintaining their inherent properties. 본 총설은 소수성 불소수지계 분리막의 표면 개질에 대한 개론으로 다양한 표면 개질 방법 및 그 연구 결과를 중점적으로 서술하였다. PTFE로 대표되는 불소수지계 고분자 분리막은 막 증류, 유수 분리, 기체 분리를 포함한 다양한 막 분리 공정에서 사용되어왔다. PTFE 막은 내화학성, 내열성, 높은 기계적 강도와 같은 뛰어난 물성에도 불구하고 소수성 표면특성으로 인해 기술 적용의 확장에 제한적이다. 친수성 향상을 위해 습식 화학법, 친수성 고분자 코팅, 플라즈마 처리, 조사, 원자층 증착과 같은 다양한 PTFE 표면 개질 방법을 이용하며 이를 통해 불소수지계 분리막의 응용분야가 확장될 수 있다.