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Barontini F.,University of Pisa | Rocchi M.,Consorzio Interuniversitario per la Protezione Dai Rischi Chimico Industriali | Tugnoli A.,University of Bologna | Cozzani V.,University of Bologna | And 4 more authors.
Chemical Engineering Transactions | Year: 2013

Thermogravimetry coupled to FTIR analysis of evolved gas was applied to the quantitative determination of key-components formed in the slow pyrolysis and thermal decomposition of tobacco samples. Eight keycomponents were selected for the study: carbon dioxide, carbon monoxide, water, acetaldehyde, glycerol, isoprene, nicotine, and phenol. Specific calibration techniques developed for FTIR evolved gas analysis were applied to carry out the quantitative analysis of evolved gases. Deconvolution techniques were applied to identify the contributions of the key-components of interest to the overall FTIR spectra. The results obtained allowed the characterization of evolution profiles of most of the key components of interest. Phenol and isoprene results were below the detection limits of the technique, while the calibration technique was not suitable for glycerol characterization due to condensation and decomposition phenomena during calibration runs. Quantitative data were obtained for carbon dioxide, carbon monoxide, water, acetaldehyde and nicotine evolution in pure nitrogen and dry air. Copyright © 2013, AIDIC Servizi S.r.l. Source


Barontini F.,University of Pisa | Barontini F.,Consorzio Interuniversitario per la Protezione Dai Rischi Chimico Industriali | Tugnoli A.,University of Bologna | Cozzani V.,Consorzio Interuniversitario per la Protezione Dai Rischi Chimico Industriali | And 5 more authors.
Industrial and Engineering Chemistry Research | Year: 2013

The identification and quantification of volatile species formed in the thermal degradation of tobacco substrates was investigated by TG-FTIR analysis. A specific experimental methodology was developed to obtain quantitative data on key components of interest present in evolved gases during TG-FTIR runs in air and nitrogen at low heating rates. Multivariate deconvolution techniques were used to identify the contributions of the key components of interest to the overall FTIR spectra. Validation runs were carried out to test the limits of the TG-FTIR technique. Significant data were obtained for the quantitative characterization and the emission profiles of some key components of evolved gases, such as acetaldehyde, carbon dioxide, carbon monoxide, nicotine, and water. A different experimental strategy based on the use of a fixed bed reactor was applied to the characterization of glycerol evolved from the tobacco substrate, thus obtaining a complete figure of the main components of the evolved gases formed during the slow thermal decomposition of tobacco substrates in nitrogen and air. © 2013 American Chemical Society. Source


Cozzani V.,University of Bologna | Cozzani V.,Consorzio Interuniversitario per la Protezione Dai Rischi Chimico Industriali | Rota R.,Polytechnic of Milan | Rota R.,Consorzio Interuniversitario per la Protezione Dai Rischi Chimico Industriali | And 8 more authors.
Chemical Engineering Transactions | Year: 2011

The iNTeg-Risk research project (http://www.integrisk.eu-vri.eu/), carried out under the 7th Framework Program (EU Grant number CP-IP-213345-2), has the purpose to promote R & D activities aimed at the improvement of the management of emerging risks related to new materials and technologies. Within the project, a specific activity is dedicated to the development of innovative approaches for the assessment of safety of LNG terminals, both offshore and onshore. A specific Guideline ("Blue Book") was issued in order to summarize new developments and available data, methods and techniques for the assessment of LNG safety. The present paper will focus on the specific contribution provided by Italian partners of the project to the "Blue Book". In particular, the work carried out on the assessment of specific scenarios related to LNG terminals and on consequence assessment models will be presented. A relevant effort was dedicated to the systematic exploration of credible accident scenarios that may follow external events involving LNG terminals. The results were used to consider the application of improved consequence assessment models both for the prediction of NG dispersion following release and for the Rapid Phase Transition that may be caused by massive LNG releases over water. © 2011, AIDIC Servizi S.r.L. Source

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