caa a22 4500 463189590 CHVBK 20180406164904.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10973-006-7624-0 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7624-0 Pyrolysis study of a hydride-sol-gel silica [Elektronische Daten] Part II. Kinetic aspects [R. Campostrini, A. Sicurelli, M. Ischia, G. Carturan] The thermal behaviour of a sol-gel prepared hybride silica gel (HSiO sample) in the 20-1000°C interval was studied by coupled thermogravimetric-mass spectrometric (TG-MS) analyses carried out at various heating rates. Thermogravimetric curve elaboration allowed the determination of the flex temperatures, corresponding to the maximum release rate of gas-evolved compounds, and to calculate the activation energy of the overall process. The mass spectrometric data, registered in the TG-MS measurements, were treated to discriminate the single reactions accounting for the release of each compound, among which water, dihydrofuran and various silane-and siloxane-derived species. These results were used to calculate the comprehensive activation energy and also those of each of the released species. Different methods of data processing were used to achieve better reliability of calculated activation energies. The discussion focuses on the high extension of kinetic information arising from MS data processing and on the advantage of identifying the contribution of single reactions, although they occur simultaneously during the heating process. In this respect, good agreement was found between the activation energies of the overall process calculated by separately processing TG and MS data. By processing MS data, the same agreement was observed in the comparison between the activation energy calculated for the overall thermal process and in the sum of the weighed activation energies of the reaction of each released compound. Springer Science+Business Media, LLC., 2007 activation energies of simultaneous thermogravimetric events nationallicence hydride silica gel nationallicence mass spectrometric analyses nationallicence pyrolysis study nationallicence Campostrini R. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut Sicurelli A. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut Ischia M. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut Carturan G. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 179-184 1388-6150 90:1<179 2007 90 10973 https://doi.org/10.1007/s10973-006-7624-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7624-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Campostrini R. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut NATIONALLICENCE 700 1- Sicurelli A. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut NATIONALLICENCE 700 1- Ischia M. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut NATIONALLICENCE 700 1- Carturan G. Dipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Università di Trento, via Mesiano 77, 38050, Trento, Italy aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 179-184 1388-6150 90:1<179 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 463189590 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer