Synthesis and characterization of Pt/Al2O3–CeO2 nanocatalyst used for toluene abatement from waste gas streams at low temperature: Conventional vs. plasma–ultrasound hybrid synthesis methods

Highly efficient Ni/CeO2-Al2O3 catalysts for CO2 upgrading via reverse water-gas shift: Effect of selected transition metal promoters

“…According to Yue et al, ceria can enhance the redox properties of Al-Ce-O supported catalysts when Ni is introduced into CeO 2 lattice [20]. Therefore, a mixed framework of Al 2 O 3 -CeO 2 with high thermal stability provides a relatively large surface for an optimal active phase dispersion and allows for oxygen vacancies generation on the surface during the catalytic reaction to improve the catalytic performance [21]. Also, the addition of ceria to alumina-based supports decreases the overall acidity thus helping to avoid carbon deposition.…”

The potential use of HNO 3 -treated clinoptilolite in the preparation of Pt/CeO 2 -Clinoptilolite nanostructured catalyst used in toluene abatement from waste gas stream at low temperature

“…They have been preferentially used in commercial practices in spite of their cost (Masui et al, 2010;Venezia et al, 2001). Among different noble metals, Pd and Pt have been widely studied for this purpose (Ö zc¸elik et al, 2009;Rahmani et al, 2014a). Pd is more active for oxidation of short-chain hydrocarbons, while Pt exhibits higher activity toward long-chain hydrocarbons and aromatics (Abbasi et al, 2011).…”

“…clinoptilolite) have indicated good potential for waste water treatment (Herney-Ramirez et al, 2010), gas separation (Rahmani et al, 2014b), gas drying (Jenkins et al, 2002;Li et al, 2013b) and other catalytic reactions (Baroi and Dalai, 2014;Li et al, 2014;Otomo et al, 2014). Because of high density of active acid sites, high thermal and mechanical stability and porous structure, zeolite based catalysts are desired for VOC abatement (Dammak et al, 2013;Jansson et al, in press (in press, available online 24 October 2014); Lo´pez-Fonseca et al, 2003;Rahmani et al, 2014a). The other advantage of using clay as catalyst support is clay's composition.…”

Abatement of toluene from polluted air over Mn/Clinoptilolite–CeO2 nanopowder: Impregnation vs. ultrasound assisted synthesis with various Mn-loading

“…Among different methods for synthesis of nanostructure materials, sonochemistry due to its power to control size, morphology and especially distribution of active phase on the support in mixed phase, has been widely applied in nanomaterial synthesis [43][44][45][46]. Sonochemical synthesis method, under principle of acoustic cavitation, provides an ultimate condition, local temperature of 5000 K, and pressures of 2000 bar, heating and cooling rates of >10 10 K/s induce unique interaction between energy and matter [47][48][49][50].…”