TY - JOUR
T1 - Fabrication of pebax-1657-based mixed-matrix membranes incorporating N-doped few-layer graphene for carbon dioxide capture enhancement
AU - Huang, Tse Chiang
AU - Liu, Yu Cheng
AU - Lin, Geng Sheng
AU - Lin, Chia Her
AU - Liu, Wei Ren
AU - Tung, Kuo Lun
N1 - Funding Information:
This work was financially supported by the “Advanced Research Center of Green Materials Science and Technology” from the Featured Area Research Center Program within the framework of the Higher Education Sprout Project of the Ministry of Education ( 108L9006 and 109L891102 ) and the Ministry of Science and Technology in Taiwan ( MOST 107-3113-E-002-009 , 107-2221-E-002-101-MY3 ; 108-2218-E-002-036 , 108-3017-F-002-002 and 109-3116-F-006 -018 ).
Funding Information:
This work was financially supported by the ?Advanced Research Center of Green Materials Science and Technology? from the Featured Area Research Center Program within the framework of the Higher Education Sprout Project of the Ministry of Education (108L9006 and 109L891102) and the Ministry of Science and Technology in Taiwan (MOST 107-3113-E-002-009, 107-2221-E-002-101-MY3; 108-2218-E-002-036, 108-3017-F-002-002 and 109-3116-F-006 -018).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - In this study, an environmentally friendly method was developed to fabricate N-doped few-layer graphene (N-FLG)/Pebax mixed-matrix membranes (MMMs) for CO2 capture. A supermixer was introduced to ensure homogeneity of the N-FLG in the Pebax solution, and a highly efficient method of N-FLG/Pebax MMM preparation was achieved. The membrane structures were analyzed by SEM, while the N-FLG morphology was examined by SEM, AFM, XPS and EDX. A detailed molecular simulation was applied to mimic and predict the behavior of and interaction between membranes and gas molecules. Through the simulation, an independent analysis of transport-related characteristics, such as diffusivity, solubility and permeability, was achieved. In addition, the simulation indicated that the affinity of N-FLG for CO2 molecules improves the CO2 capture performance, that the membranes are solubility-dependent when prepared with low contents of N-FLG and that the effect of diffusivity increases as the addition of N-GO increases above 5 wt%. The simulation results were highly correlated with the experimental results, while the experimental gas permeability results showed that the optimal performance of N-FLG/Pebax MMM was obtained with the addition of 4 wt% N-FLG, providing CO2 permeability and CO2/N2 selectivity of 239.8 Barrer and 95.5, respectively. Pebax-1657-based MMMs incorporating N-FLG nanosheets fabricated by an environmentally friendly method can therefore be considered a promising material for CO2 capture applications.
AB - In this study, an environmentally friendly method was developed to fabricate N-doped few-layer graphene (N-FLG)/Pebax mixed-matrix membranes (MMMs) for CO2 capture. A supermixer was introduced to ensure homogeneity of the N-FLG in the Pebax solution, and a highly efficient method of N-FLG/Pebax MMM preparation was achieved. The membrane structures were analyzed by SEM, while the N-FLG morphology was examined by SEM, AFM, XPS and EDX. A detailed molecular simulation was applied to mimic and predict the behavior of and interaction between membranes and gas molecules. Through the simulation, an independent analysis of transport-related characteristics, such as diffusivity, solubility and permeability, was achieved. In addition, the simulation indicated that the affinity of N-FLG for CO2 molecules improves the CO2 capture performance, that the membranes are solubility-dependent when prepared with low contents of N-FLG and that the effect of diffusivity increases as the addition of N-GO increases above 5 wt%. The simulation results were highly correlated with the experimental results, while the experimental gas permeability results showed that the optimal performance of N-FLG/Pebax MMM was obtained with the addition of 4 wt% N-FLG, providing CO2 permeability and CO2/N2 selectivity of 239.8 Barrer and 95.5, respectively. Pebax-1657-based MMMs incorporating N-FLG nanosheets fabricated by an environmentally friendly method can therefore be considered a promising material for CO2 capture applications.
KW - CO capture
KW - Few-layer graphene
KW - Mixed-matrix membranes
KW - N-doped
KW - Pebax
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U2 - 10.1016/j.memsci.2020.117946
DO - 10.1016/j.memsci.2020.117946
M3 - Article
AN - SCOPUS:85079678302
VL - 602
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
M1 - 117946
ER -