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- W2024913087 abstract "In our recent studies (Vinh-Thang, H.; Huang, Q.; Eić, M.; Trong-On, D.; Kaliaguine, S. Langmuir 2005, 21, 2051−2057; Vinh-Thang, H.; Huang, Q.; Eić, M.; Trong-On, D.; Kaliaguine, S. Stud. Surf. Sci. Catal. 2005, in press), a series of synthesized SBA-15 materials were characterized using nitrogen adsorption/desorption isotherms at 77 K and SEM images. In the present paper, four of them (MMS-1-RT, MMS-1-60, MMS-1-80, and MMS-5-80) were further investigated with regard to their equilibrium characteristics using n-heptane and toluene as sorbates by the standard gravimetric technique. SBA-15 materials proved to have a broad pore size distribution within the micropore/small-mesopore range in the walls of their main mesoporous channels. The adsorption capacities for toluene were found to be higher than for n-heptane. The isosteric heats of adsorption, estimated by the Clausius−Clapeyron equation, are also higher for toluene compared to n-heptane. They were found to depend on framework microporosity of the relevant SBA-15 samples. The isosteric heats of adsorption for all sorbates decrease with increased loading and approach the heats of evaporation of the respective sorbate. The adsorption capacities of SBA-15 samples are significantly higher than those of silicalite, i.e., the MFI zeolite silica analogue. In contrast to that, the isosteric heats of adsorption in the mesopore channels of SBA-15 were found to be much smaller. This result also suggests that SBA-15 can potentially be a good candidate for separation of C7 hydrocarbons." @default.
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- W2024913087 date "2005-04-14" @default.
- W2024913087 modified "2023-10-18" @default.
- W2024913087 title "Adsorption of C<sub>7</sub> Hydrocarbons on Biporous SBA-15 Mesoporous Silica" @default.
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- W2024913087 doi "https://doi.org/10.1021/la050135o" @default.
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