Comparative CO2 Adsorption Analysis in Pure and Amine-Modified Composite Membranes |
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| Authors: | Sarah Farrukh X Fan Arshad Hussain |
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| Affiliation: | 1. School of Chemical and Materials Engineering, National University of Sciences &2. Technology, Islamabad, Pakistan;3. Institute for Materials and Processes, School of Engineering, University of Edinburgh, Scotland, UK;4. Institute for Materials and Processes, School of Engineering, University of Edinburgh, Scotland, UK |
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| Abstract: | In this study, the CO2 adsorption analysis in cellulose acetate–TiO2- and cellulose acetate–3-aminopropyl-trimethoxysilane TiO2-blended membranes was performed. The membranes were also characterized using scanning electron microscopy and Fourier transform infrared analysis techniques. The adsorption results indicated that 120 and 90°C were considered as optimized temperatures for regeneration of cellulose acetate–TiO2 and cellulose acetate–3-aminopropyl-trimethoxysilane-modified TiO2 membranes. The testing results revealed that adsorption capacity reached maximum at 3.0 bars. Validation of experimental results was performed by pseudo-first-order, second-order and intraparticle diffusion models. The correlation factor R2 represented that the second-order model was fitted well with the experimental data. The intraparticle diffusion model represented that adsorption is not a single-step process. |
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| Keywords: | Cellulose acetate CO2 composite membranes gas adsorption pseudo-order models TiO2 |
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