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• W2884030141 abstract "Abstract Polydimethylsiloxane (PDMS) mixed matrix membranes (MMM)s containing microporous adsorptive carbon nanoparticles (ACNs) are developed for CO2/CH4 and C3H8/CH4 separation. The ACNs are produced by the pyrolysis of a phenolic resin precursor at 700 °C and transformed into fine particles through ball-milling. For functionalization of the particles and widening of the pores, the prepared ACNs undergo ozone treatment to increase the sorption capacity and to reduce diffusional limitations. Successful accomplishment of modification is evidenced by pore size distribution, X-ray diffraction, and Fourier transform infrared spectra analyses. MMMs containing different amounts of both native ACNs (ACN-N) and oxidized ACNs (ACN-O) are evaluated in terms of permeability, solubility and diffusivity coefficients for target gases. Based on the results, higher pressure and lower temperature promote gas separation due to capillary condensation of penetrants in the micropores of the particles present in the MMMs. Activation energy of permeation, diffusion, and enthalpy of sorption are also determined for MMMs and compared to the pure PDMS membrane. The real selectivity in PDMS/ACN-O (10%) membrane for CO2/CH4 and C3H8/CH4 are 57.3% and 53.1% higher than those in pure PDMS membrane. This enhancement is attributed to the selective adsorption and surface diffusion of the more adsorbable component in ACNs as well as partial diffusion hindrance of less adsorbing component (CH4) in the presence of more adsorbable component (e.g., CO2, C3H8) onto the surface of ACN pores. Also, CO2 and C3H8 permeability improved by 61.6% and 47.7% respectively, compared to the pure PDMS membrane and is attributed to the formation of extra free volume in PDMS matrix as a result of chain packing disruption in the presence of ACNs. According to the findings, the fabricated membranes are promising candidates for natural gas sweetening and hydrocarbon recovery." @default.
• W2884030141 created "2018-08-03" @default.
• W2884030141 creator A5013585881 @default.
• W2884030141 creator A5043344736 @default.
• W2884030141 creator A5057889248 @default.
• W2884030141 creator A5086781728 @default.
• W2884030141 date "2019-01-01" @default.
• W2884030141 modified "2023-10-13" @default.
• W2884030141 title "Synthesis and fabrication of adsorptive carbon nanoparticles (ACNs)/PDMS mixed matrix membranes for efficient CO2/CH4 and C3H8/CH4 separation" @default.
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• W2884030141 doi "https://doi.org/10.1016/j.seppur.2018.07.055" @default.
• W2884030141 hasPublicationYear "2019" @default.
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