resumo
SAPO-34 nanocrystals were prepared and used as inorganic filler in polyethersulfone (PES) membranes. The influence of preparation conditions on permeation properties of CO2 and N2 gases and CO2/N2 selectivity were studied to achieve the highest separation performance possible for this mixed-matrix membrane. Gas permeation properties of PES/SAPO-34 MMMs with different contents of SAPO-34, PES and initial film thickness were investigated according to a full factorial design of experiments (DOE). The permeation tests and DOE results revealed that the optimized conditions to maximize the selectivity for PES/SAPO-34 are: composition of 18.5 wt % of SAPO-34, 15 wt% of PES, and a casted film thickness of 400 mu m resulting in a CO2/N2 selectivity of 30.85. The findings showed that a multivariable model was validated and able to predict the selectivity with determination coefficient R2 of 0.969 and the results are in accordance with values presented in literature for PES/ SAPO-34 membranes. An economic analysis shows that the commercial grade price for the optimized membrane is EUR 9.43/m2 which represents around 2.2 times cheaper than polymeric commercial membranes.
palavras-chave
MIXED MATRIX MEMBRANES; IONIC LIQUID; FUNCTIONALIZED SAPO-34; REMOVAL
categoria
Chemistry; Science & Technology - Other Topics; Materials Science
autores
Cardoso, JS; Fonseca, JP; Lin, Z; Brito, P; Gando-Ferreira, LM
nossos autores
Jonathan Simonace Cardoso
Estudante de doutoramento
Zhi Lin
Investigador Principalagradecimentos
The authors gratefully acknowledge the fundings from the Strategic Project of CIEPQPF (UIDB/00102/2020) , CICECO-Aveiro Institute of Materials (UIDB/50 011/2020, UIDP/50 011/2020 & LA/P/0 0 06/2020) , CIMO (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2021) , financed by Fundacao para a Ciencia e Tecnologia (FCT) through national funds. J. S. Cardoso is also grateful for the financial support of the FCT through the PhD grant (SFRH/BD/148170/2019) . Prof. Dr. Marco Seabra, Coimbra University, is acknowledged for his suggestions to the design of experiments and statistical analysis.