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Polyurethane membranes reinforced with calcium carbonate and oyster powder for application in the separation of CH4/CO2 from greenhouse gases

Polyurethane membranes reinforced with calcium carbonate and oyster powder for application in the... Human actions over the years have aroused concerns due to their potential pollution, causing an increase in the emission of greenhouse gases into the atmosphere. Polymeric membranes have been used to separate these gases and this technology has proved itself very promising since it presents a lower energy consumption when compared to other separation processes. In this study, the effect of calcium carbonate additives and of oyster powder was evaluated on polymeric polyurethane (PU) membranes. The membranes were obtained by the phase inversion technique using two different techniques: immersion precipitation and solvent evaporation. The obtained membranes were tested in the separation of CH4 and CO2 from greenhouse gases, which are the main contributors to the increase of the greenhouse effects. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), permeability and selectivity tests were performed to characterize the synthesized composite membranes. The SEM results showed a dense membrane morphology with an increase in free volume when the additives were incorporated to the PU structure. According to the FTIR results, the membranes obtained did not change the structure of the PU. As for the application tests, all composite membranes showed greater permeability for CH4 gas, due to a greater affinity of the gas with the polymeric matrix. The addition of both CaCO3 and oyster powder to the composition of the polymeric membrane contributed to increase the permeability of the gases tested, due to the increase in free volume. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Brazilian Journal of Chemical Engineering Springer Journals

Polyurethane membranes reinforced with calcium carbonate and oyster powder for application in the separation of CH4/CO2 from greenhouse gases

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References (53)

Publisher
Springer Journals
Copyright
Copyright © Associação Brasileira de Engenharia Química 2021
ISSN
0104-6632
eISSN
1678-4383
DOI
10.1007/s43153-021-00112-7
Publisher site
See Article on Publisher Site

Abstract

Human actions over the years have aroused concerns due to their potential pollution, causing an increase in the emission of greenhouse gases into the atmosphere. Polymeric membranes have been used to separate these gases and this technology has proved itself very promising since it presents a lower energy consumption when compared to other separation processes. In this study, the effect of calcium carbonate additives and of oyster powder was evaluated on polymeric polyurethane (PU) membranes. The membranes were obtained by the phase inversion technique using two different techniques: immersion precipitation and solvent evaporation. The obtained membranes were tested in the separation of CH4 and CO2 from greenhouse gases, which are the main contributors to the increase of the greenhouse effects. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), permeability and selectivity tests were performed to characterize the synthesized composite membranes. The SEM results showed a dense membrane morphology with an increase in free volume when the additives were incorporated to the PU structure. According to the FTIR results, the membranes obtained did not change the structure of the PU. As for the application tests, all composite membranes showed greater permeability for CH4 gas, due to a greater affinity of the gas with the polymeric matrix. The addition of both CaCO3 and oyster powder to the composition of the polymeric membrane contributed to increase the permeability of the gases tested, due to the increase in free volume.

Journal

Brazilian Journal of Chemical Engineering – Springer Journals

Published: Sep 1, 2021

Keywords: CaCO3; Oyster powder; PU membrane; Immersion precipitation; Solvent evaporation; Gas separation

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