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RISS 인기검색어
- 검색키워드
- 저자 : Mona Zamani Pedram (검색결과 3 건)
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Mona Zamani Pedram,Mohammad Reza Omidkhah,Abtin Ebadi Amooghin 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
In this research, the cross-linking of diethanolamine (DEA) impregnated poly(vinyl alcohol) (PVA) onpolytetrafluoroethylene (PTFE) by glutaraldehyde (GA) with different blend compositions (GA/PVA: 0.5,1, 3, 5, 7 ratio%) was performed in the absence of an acid catalyst and organic solvents in order to avoidany interference in CO2 facilitation reaction with DEA. The fabricated membranes were characterized bydifferential scanning calorimetry (DSC), Fourier transform infrared (FTIR) and scanning electronmicroscopy (SEM). Furthermore, the effects of cross-linking agent content, feed pressure andcomposition as well as stability on CO2/CH4 transport properties were investigated in both pure andmixed gas experiments. The cross-linked membranes showed reasonable CO2/CH4 permselectivities incomparison with uncross-linked membranes. The best-yield CO2-selective membranes (DEA-PVA/GA(1 wt%)/PTFE) represented the best CO2/CH4 selectivity of 91.13 and 665 for pure and mixed gasexperiments, respectively.
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Mona Jamshidi,Vahid Pirouzfar,Reza Abedini,Mona Zamani Pedram 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.3
Mixed matrix membranes were made of polysulfone and Matrimid® polymers, and SiO2 and TiO2 nanoparticles in order to improve the efficiency of polymeric membrane in gas separation and review the efficiency of membrane separation process, laboratory. The modeling results of selectivity and permeability of gases O2, N2, CO2 and CH4 were discussed for different membranes. Another objective of this study was to submit a report on the importance of the statistical analysis and modeling in design and optimizing mixed matrix membranes to separate gas. The D-optimal method was applied to model and optimize the selectivity and permeability due to the main parameters. The obtained results indicated that the permeability of all gases demonstrated an ascending trend when the nanoparticles were increased. Under optimized conditions, the permeability of the gases O2, N2, CO2, CH4 in the membrane of PSF (12)/SiO2 (13.82) was 2.49, 1.113, 12.82 and 0.885 Barrer, respectively. A statistical method was practiced in the current research to design, optimize and separate gas membranes through effective efficiency for different applications.
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Mohammad Mehdi Moftakhari Sharifzadeh,Abtin Ebadi Amooghin,Mona Zamani Pedram,Mohammad Reza Omidkhah 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
In this study, a comprehensive time-dependent mathematical model for gas separation through thefacilitated transport membranes (FTMs) is presented. The model results have been validated withindependent CO2/N2 binary gas mixture experiments in DEA-impregnated PVA membranes. In theproposed model, non-equal diffusion coefficients of the carrier/complex and equilibrium constant for thechemical reaction kinetics between the carrier/permeant in the FTM have been considered. In addition, amethod to compute the diffusion coefficients, which depend on the concentration of each component inthe FTM, is presented. Moreover, effect of carrier concentration, feed partial pressure, kinetics ofreversible chemical reactions and membrane performances depending on operating condition have beenanalyzed. Owing to accurate calculation of physical–chemical parameter involved, this model is muchmore executive comparing to previous works. In addition, the real condition of the reaction kinetics andinfluencing of diffusion parameters of the components in FTMs, have been investigated. The predictedselectivity and permeability revealed good conformity with experimental data; with standard deviation(SD) 8.57% and 12.87%, respectively. In conclusion, this model with significant validity would bepredictive in cases for the entire range of diffusion-limit to a chemical-limit regime where theexperimental data, geometry condition, physical–chemical property of parameters is not available.
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