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CH4-Selective Mixed-Matrix Membranes Containing Functionalized Silica for Natural Gas Purification |
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| Authors: | Seyed Mohammdhadi Mousavi Ahmadreza Raisi Hamid Hashemi Moghaddam Mohammad Salehi Maleh |
| Affiliation: | 1. Islamic Azad University, Department of Analytical Chemistry, Faculty of Engineering, Damghan Baranch, Damghan, Iran;2. Amirkabir University of Technology (Tehran Polytechnic), Department of Chemical Engineering, Hafez Ave., P.O. Box 15875-4413, Tehran, Iran |
| Abstract: | Mixed-matrix membranes were prepared by incorporating functionalized silica nanoparticles (SNPs) into the poly(ether-block-amide). The gas permeation properties of membranes were investigated for the separation of N2 and CO2 from CH4. Results revealed that chemical modification of SNPs and incorporation of the carboxylic groups on its surface had a strong interaction with the polymer matrix and improved the distribution of the nanofiller in the membrane matrix. According to the gas permeation experiments at various SNPs loadings and feed pressures, different trends were observed for the permeability and selectivity. Incorporation of the modified-SNPs nanofiller into the membrane enhanced the CH4 permeability, as well as the CH4/N2 and CO2/N2 selectivities. |
| Keywords: | CH4-selective mixed-matrix membrane Functionalized silica Gas separation Natural gas purification Silica nanoparticles |