1. Trapping of BTX compounds by SiO2, Ag-SiO2, Cu-SiO2, and Fe-SiO2 porous substrates.
- Author
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Hernández MA, Asomoza M, Rojas F, Solís S, Portillo R, Salgado MA, Felipe C, Portillo Y, and Hernández F
- Subjects
- Adsorption, Copper chemistry, Iron chemistry, Porosity, Silver chemistry, Toluene chemistry, Xylenes chemistry, Benzene chemistry, Benzene Derivatives chemistry, Environmental Restoration and Remediation methods, Silicon Dioxide chemistry
- Abstract
Adsorption isotherms of BTX aromatic hydrocarbons (benzene, toluene, and p-xylene) on pristine (SiO2) and metal-doped (Ag-SiO2, Cu-SiO2 and Fe-SiO2) mesoporous and microporous substrates were measured and interpreted. These adsorbents were synthesized by the sol-gel procedure and their BTX sorption isotherms were obtained by the gas chromatographic technique (GC) at several temperatures in the range 423-593 K. The uptake amount of these hydrocarbon adsorptives on SiO2, Ag-SiO2, Cu-SiO2 and Fe-SiO2 mesoporous and microporous substrates was temperature-dependent. Additionally, the interaction of BTX molecules with the pore walls was evaluated by means of the corresponding isosteric heat of adsorption (qst), which was found to follow the next increasing sequence: qst (benzene)
- Published
- 2010
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