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- W3203065338 endingPage "127355" @default.
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- W3203065338 abstract "KOH-activated carbon (KAC) with high surface area and abundant micropores are widely used in adsorbing volatile organic compounds (VOCs). Kinetic diameters (σ) of VOCs are an important factor controlling diffusion of VOCs into pores of adsorbent. Yet the influence of kinetic diameters of VOCs on their adsorption by KAC remains unclear. Here, we investigated the dynamic adsorption of VOCs with various kinetic diameters on a prepared KAC with high surface area of 3100 m2/g, pore volume of 2.08 cm3/g and average pore width (D) of 2.68 nm. Adsorption affinity was negatively correlated with size difference (D-σ), indicating that pore width of adsorbent should close to σ to obtain a strong interaction between VOCs and adsorbents. Amounts adsorbed were positively correlated with σ at low relative pressures (p/p0 < 0.01), and negatively correlated with σ at high relative pressures (p/p0 > 0.044). The above results suggest that larger molecules with higher affinities are preferentially adsorbed at low relative pressures, amounts adsorbed of smaller molecules are larger than that of bigger molecules at high relative pressures. This study provided new insights into adsorption mechanisms mediated by σ and the development of next generation adsorbents for efficient removal of VOCs." @default.
- W3203065338 created "2021-10-11" @default.
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- W3203065338 date "2022-02-01" @default.
- W3203065338 modified "2023-10-16" @default.
- W3203065338 title "Role of molecular size of volatile organic compounds on their adsorption by KOH-activated micro-mesoporous carbon" @default.
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- W3203065338 doi "https://doi.org/10.1016/j.jhazmat.2021.127355" @default.
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