Supercritical fluid extraction: an innovative tool for a fly ash-like model support.
The performance of the supercritical fluid extraction (SFE) technique to obtain a new and more appropriate model support for PCDD/F formation studies was investigated. To characterize fly ash and model supports and relate their chemical-physical properties, surface area and pore size were determined. To evaluate the influence on reactivity of the different model supports with respect to raw fly ash, a kinetic study of the thermal behavior of dibenzofuran (DF) was performed. Rate constants as well as the activation and thermodynamic parameters for the different systems were also compared. The model support obtained from SFE was very similar to raw fly ash from the structural, physical-chemical, and kinetic points of view.
Brocca
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D
Dipartimento di Scienze dell'Ambiente e del Territorio, Università degli Studi di Milano-Bicocca, Milano, Italy.
Lasagni
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M
Collina
E
E
Tettamanti
M
M
Pitea
D
D
D001572:Benzofurans / Q000737:chemistry*; D017745:Incineration; D007700:Kinetics; D008962:Models, Theoretical; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000737:chemistry*; D016062:Porosity; D012037:Refuse Disposal; D012989:Soil Pollutants / Q000032:analysis*; D013696:Temperature
D001572:Benzofurans; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants; C023614:dibenzofuran