Low-temperature decomposition of some halogenated hydrocarbons using metal oxide/porous carbon catalysts

Destruction of volatile organic compounds by catalytic oxidation

“…Excepting for palladium in the case of methane, platinum is recognised to be the most active metal for hydrocarbons oxidation (Burch and Hayes, 1995;. Information concerning the activities of noble metals for oxidation of halogenated hydrocarbons varies in the literature; Petrosius et al (Petrosius et al, 1993) claimed that noble metals are not choices for this reaction because of their price and their sensitivity of Cl 2 and HCl. In the same year Windawi and Wyatt (Windawi and Wyatt, 1993) claimed that these catalysts have been successfully commercialized for destruction of halogenated compounds, because of their efficiencies, and there are reports which can advocate this affirmation (Lester, 1999;Müller et al, 1993;Petrosius et al, 1993;Spivey and Butt 1992;Windawi and Wyatt, 1993;van den Brink et al, 1998).…”

“…Transition metal oxides have been found to be very active, both in complete and selective oxidation of hydrocarbons (Anderson, 1986). Several mixed metal oxide systems were applied (Spivey and Butt, 1992;Zwinkels et al, 1993;Petrosius et al, 1993;Kulazynski et al, 2002) on the oxidation of chlorinated hydrocarbons. Formation of toxic polychlorinated by-products (Froeze and Hutzinger, 1996) and loss of catalytic material as volatile oxychlorides (Griesbaum et al, 1997) are often encountered as drawbacks.…”

“…Chromium oxide containing catalysts (typically 12-25wt. % chromia calculated as Cr 2 O 3 ) seem to have been used broadly and successfully on halogenated compounds destruction (Lester, 1999;Petrosius et al, 1993) and are claimed to be ones of the most active catalysts in destruction of these compounds (Feijen-Jeurissen et al, 1999). The performances of some chromiabased catalysts seem to be superior to noble metals containing catalysts.…”

Catalytic abatement of trichloroethylene over Mo and/or W-based bronzes

“…In this way, noble metals are very active, however, they can be easily poisoned by chlorine. On the other hand, chromium oxides are active [27], but their application is restricted to low operation temperatures because the formation of volatile and very toxic chromium oxychloride can occur. In the last years, new catalysts based in zeolites have been proposed as active catalysts for this reaction obtaining interesting results [28][29][30][31][32].…”

Preparation and characterization of Nickel-and cobalt-doped magnetites

“…Magnetic ferrites are used in many technological applications as those of permanent magnets, microwave absorbers, catalysts and chemical sensors [1][2][3] . Magnetite and cationsubstituted magnetites are some of the most extensively studied spinels.…”