Papers by Cristina Leonelli
The haematinon bowl from Pydna. Height 5.5 cm. © 27 th Ephorate of Prehistoric and Classical Anti... more The haematinon bowl from Pydna. Height 5.5 cm. © 27 th Ephorate of Prehistoric and Classical Antiquities, Greece. The bowl (skyphos) is discussed in the paper by Despina Ignatiadou ' A haematinon bowl from Pydna' , p. 69.
ABSTRACT Mixed oxides NbVO5 amorphous catalysts have been synthesised by means of the sol-gel tec... more ABSTRACT Mixed oxides NbVO5 amorphous catalysts have been synthesised by means of the sol-gel technique using different vanadium oxide to water ratios and gel drying treatments: in particular air-drying at room temperature and microwave heating have been adopted. Successively, the dried materials were calcinated up to 550 degrees C in flowing air. Brunauer-Emmett-Teller (BET) surface area analysis showed that this parameter depends on drying method and on the thermal treatment. Differential thermal analysis (DTA) proved that the crystallisation process of the NbVO5 powders occurred at lower temperature when microwave drying was used. An increase of crystallinity was also recorded by X-ray diffraction (XRD) analysis for samples prepared using a high V/H2O ratio and dried by microwave heating. These samples also show high reducibility and surface acidity, as demonstrated by temperature programmed reduction (TPR) and temperature programmed desorption (TPD) techniques respectively. An improvement of the catalytic performances for the gel dried by microwave heating in the oxidative dehydrogenation of ethane at 550 degrees C has been observed. (C) 2013 Published by Elsevier B.V.
... Pietro Russo a , Corresponding Author Contact Information , E-mail The Corresponding Author ,... more ... Pietro Russo a , Corresponding Author Contact Information , E-mail The Corresponding Author , Domenico Acierno a , Anna Corradi b and Cristina Leonelli b. ... Sci. Lett. 12 (1993), pp. 1344–1345. View Record in Scopus | Cited By in Scopus (14). [5]A. Rizzuti and C. Leonelli ...
Microwave Solvothermal Synthesis (MSS) is a chemical technology, where apart from possible effect... more Microwave Solvothermal Synthesis (MSS) is a chemical technology, where apart from possible effects of microwaves on the chemical reaction paths, microwave heating allows the precise planning of a time-temperature schedule, as well as to achieve high super-saturation of the reagents uniformly in the reactor vessel. Thus, MSS is suitable for production of nanoparticles with small grain size distribution and a high degree of crystallinity. A further advantage of the technology is a much lower synthesis temperature than for gas phase, plasma or sol-gel technologies. New reactors have been developed to exploit these advantages of the MSS technology of nanoparticles synthesis and to scale up the production rate. Reactor design and realization has been shown to be decisive and critical for the control of the MSS technology. Examples of oxidic and phosphatic nanoparticles synthesis have been reported.
Industrial-scale fi lter dryers, equipped with one or more microwave input ports, have been model... more Industrial-scale fi lter dryers, equipped with one or more microwave input ports, have been modelled with the aim of detecting existing criticalities, proposing possible solutions and optimizing the overall system effi ciency and treatment homogeneity. Three different loading conditions have been simulated, namely the empty applicator, the applicator partially loaded by both a high-loss and low loss load, whose dielectric properties correspond to the one measured on real products.
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Papers by Cristina Leonelli