Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

Membranes

Chao-Fong Wu¹  Guo-Liang Zhuang¹  Ming-Yen Wey¹  Hui-Hsin Tseng² 

[1] Department of Environmental Engineering, National Chung Hsing University, Taichung 402, Taiwan;School of Occupational Safety and Health, Chung Shan Medical University, Taichung 402, Taiwan;

关键词: gas separations;    carbon dioxide capture;    water-in-emulsion method;    curing temperature;   

DOI  :  10.3390/membranes11010059

来源: DOAJ

【 摘 要 】

The effects of green processes in hybrid polydimethylsiloxane (PDMS) membranes on CO₂ separation have received little attention to date. The effective CO₂ separation of the membranes is believed to be controlled by the reaction and curing process. In this study, hybrid PDMS membranes were fabricated on ceramic substrates using the water-in-emulsion method and evaluated for their gas transport properties. The effects of the tetraethylorthosilicate (TEOS) concentration and curing temperature on the morphology and CO₂ separation performance were investigated. The viscosity measurement showed that, at specific reaction times, it is benefit beneficial to fabricate the symmetric hybrid PDMS membranes with a uniform and dense selective layer on the substrate. Moreover, the a high TEOS concentration can decrease the reaction time and obtain create the a fully crosslinked structure, allowing more efficient CO₂/N₂ separation. The separation performance was furtherly improved with in the membrane prepared at a high curing temperature of 120 °C. The developed membrane shows excellent CO₂/N₂ separation with a CO₂ permeance of 27.7 ± 1.3 GPU and a CO₂/N₂ selectivity of 10.3 ± 0.3. Moreover, the membrane shows a stable gas separation performance of up to 5 bar of pressure.

【 授权许可】

Unknown