Romanelli G.P.,National University of La Plata |
Villabrille P.I.,National University of La Plata |
Caceres C.V.,National University of La Plata |
Vazquez P.G.,National University of La Plata |
And 2 more authors.
Catalysis Communications | Year: 2011
H4PMo11VO40, H5PMo 10V2O40 and H9PMo6V 6O40 acids and an acidic pyridinium salt of H 4PMo11VO40 were synthesized. They were characterized by FT-IR and the variations of their acid properties were determined by titration with n-butylamine. They proved to be highly active and selective catalysts for the hydrogen peroxide oxidation of methyl phenyl sulfide to the corresponding sulfoxide or sulfone. The conversion and selectivity results may be explained in terms of the co-existence of acidic and oxidative properties in the catalysts. On the other hand, a convenient catalytic homogeneous procedure has been found to oxidize different sulfides to sulfoxides or sulfones, with 35% aqueous H2O2, using (PyH)H 3PMo11VO40 as catalyst. The oxidation reaction is carried out at room temperature for sulfoxides or 40 °C for sulfones and requires a short time. The sulfoxides or sulfones were obtained with excellent yields by controlling the amount of H2O2. © 2010 Elsevier B.V. All rights reserved.
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: ENV.2010.3.1.1-2 | Award Amount: 4.85M | Year: 2011
The Routes project is addressed to discover new routes in wastewater and sludge treatment which allow: a) to prepare sludge for agricultural utilization by transforming it in a very clean and stabilized product regarding the presence of organic micropollutants (conventional and emerging ones) and of heavy metals, and with respect to hygienic aspects and to phytotoxicity; b) to minimize sludge production by innovative solutions which can be based on different approaches, i.e.: i) metabolic uncoupling where the free energy released by electrons transport is dissipated in heat, in the activation of alternative metabolic routes or in the accumulation of polymeric products, ii) the use of microbial fuel cells, iii) the use of sequencing batch biofilter granular reactor (SBBGR), iiii) the integration of a side-stream process in membrane bioreactors; c) to promote recovery of valuable materials from anaerobic digestion, i.e. biopolymers as polyhydroxyalkanoates and fertilizers; e) to set up and prove at practical scale a novel technique for sludge disposal (wet oxidation) as sustainable alternative to nowadays the most used incineration; f) to minimize energy pumping by adjusting solid concentration, on a practical installation where sludge is pumped from the production site to a centralized plant. The general objective of the Routes proposal is therefore to set up a panel of different solutions to be applied in different conditions and circumstances, strictly following the waste hierarchy of the Directive 08/98 on waste. The above solutions will be studied either in laboratory or at practical scale, depending on the maturity of the technology, in order to provide to the Commission and the technical and scientific community applicable solutions and new routes for sludge management, also based on the best integration between the water and sludge treatment lines.
Giuliano A.,University of Venice |
Bolzonella D.,University of Verona |
Bolzonella D.,Consorzio Interuniversitario Nazionale La Chimica per lAmbiente |
Pavan P.,University of Venice |
And 3 more authors.
Bioresource Technology | Year: 2013
In this study the optimization of the biogas yield from anaerobic co-digestion of manures and energy crops was carried out using four pilot scale CSTRs under different operating conditions. The effect on biogas yield of the partial substitution of energy crops with agro-waste was also investigated. For each substrate used during the continuous trials, BMP batch assays were also carried out to verify the maximum methane yield theoretically obtainable. Continuous operation results indicated that the co-digestion of manures, energy crops and agro-waste was viable at all operating conditions tested, with the greatest specific gas production of 0.54m3/kgVSfed at an organic load rate of 2kgTVS/m3 rd consisting of 50% manure, 25% energy crops and 25% agro-waste on VS basis. No significant differences were observed between high and low loaded reactors suggesting the possibility of either improving the OLR in existing anaerobic reactors or reducing the design volumes of new reactors. © 2012.
Tundo P.,Consorzio Interuniversitario Nazionale La Chimica per lAmbiente |
Tundo P.,University of Venice |
Arico F.,Consorzio Interuniversitario Nazionale La Chimica per lAmbiente |
Arico F.,University of Venice |
And 6 more authors.
ChemSusChem | Year: 2010
A green synthetic approach for dimethyl isosorbide (DMI) with dimethylcarbonate (DMC) in the presence of a base is reported. The easy methylation of isosorbide may be due to its unique structure (which enhances the nucleophilicity of the hydroxyl groups), and to the effect of the hydrogen bonding which increases the reactivity of the molecule towards DMC. © 2010 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim.
Marc G.,University of Palermo |
Marc G.,Consorzio Interuniversitario Nazionale La Chimica per lAmbiente |
Garcia-Lopez E.I.,University of Palermo |
Garcia-Lopez E.I.,Consorzio Interuniversitario Nazionale La Chimica per lAmbiente |
And 2 more authors.
Applied Catalysis A: General | Year: 2012
Hybrid materials have been prepared by impregnation of the heteropolyacid H 3PW 12O 40 on commercial TiO 2. The polyoxometalates (POM) amount deposited was 15, 30, 50 and 70% with respect to the weight of the TiO 2 support. Moreover two samples containing a POM amount of 15, and 50% with respect to the weight of SiO 2 were also prepared for the sake of comparison. All prepared samples were efficient catalysts for the hydration of propene to 2-propanol in gas-solid regime at atmospheric pressure and at temperatures ranging between 50 and 85 °C. The study carried out on the hybrid TiO 2 based materials evidenced that, as far as the catalytic activity is concerned, exists an optimum in the amount of POM. Notably the contemporary presence of heat and UV light improved the activity of the POM/TiO 2 and POM/SiO 2 materials, although POM/TiO 2 showed better catalytic and catalytic photo-assisted activity than POM/SiO 2. POM species played a key role in both the catalytic and photo-assisted catalytic reactions, due to its surface acidity and ability to form strong oxidant species under UV irradiation. The presence of TiO 2 under UV irradiation improved the heteropolyacid performance supplying conduction band electrons to the POM. © 2012 Elsevier B.V. All rights reserved.