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- W2006818053 abstract "In this study, methane storage capacity of granular activated carbons (GACs) and two types of multi-walled carbon nanotubes (MWCNTs) was investigated and compared. An experimental apparatus consisting a dual adsorption vessel was set up for measurement of equilibrium adsorption of methane on adsorbents using volumetric technique at pressure range of 0–50 bar at different temperatures. The first type of MWCNs has shown lower methane uptake (4.5 mmol g−1) compared to GACs (6.5 mmol g−1) at the temperature of 283.15 K and the pressure of 50 bar, while 33 mmol g−1 of methane storage capacity was achieved using the second type of MWCNTs that is much higher than methane storage on GACs at the same operating conditions. The superior uptake performance for the second type of MWCNTs can be attributed to its specific characteristics such as smaller pore size and higher pore volume. The experimental data of adsorption were almost equally well described by Langmuir, Freundlich and Sips equations to determine the model isotherms. The isosteric heat of methane adsorption on the adsorbent was calculated based on Clausius–Clapeyron and the Sips isotherm model using the experimental data at different temperatures. Results revealed that the isosteric heat of methane adsorption on MWCNTs was lower than the heat of methane adsorption on GACs. Low values obtained for isosteric heats of adsorption indicated dominance of physisorption mechanism for all adsorbents. In general, the obtained data indicated that some well-structured MWCNTs with uniform and narrow size distribution as well as higher pore volume are potential materials for methane storage and deserve further study." @default.
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- W2006818053 date "2012-07-02" @default.
- W2006818053 modified "2023-10-16" @default.
- W2006818053 title "Comparative experimental study of methane adsorption on multi-walled carbon nanotubes and granular activated carbons" @default.
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- W2006818053 doi "https://doi.org/10.1080/17458080.2012.661470" @default.
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