CORESTA Meeting, Smoke/Technology, Innsbruck, 1999, ST19
Quantitative characterization of tobacco pyrolysis products using TG/FTIR
Philip Morris USA, Research Center, Richmond, VA, USA
A TG/FTIR instrument that combines thermogravimetric analysis with evolved products analysis by Fourier transform infrared spectroscopy is a powerful thermo-analytical technique providing a quantitative time-resolved analysis of major pyrolysis products of any bio-originated material including tobacco. In this work, we demonstrate how the time-resolved spectra of TG/FTIR along with the target factor analysis (TFA) can be used to identify and then quantify the pyrolysis products. This technique was employed for the characterization of up to twenty major pyrolysis products of Burley and blended tobaccos. It was shown that tar is the primary and most abundant product of tobacco pyrolysis. Other oxygenated products such as aldehydes, acids, alcohols, and light hydrocarbons were also quantified. In order to practically use the data generated from this instrument, a non-isothermal method of determining kinetic parameters was also used to estimate the kinetic parameters of evolved products during tobacco pyrolysis. Furthermore, the application of these estimated kinetic parameters in predicting the products yields from a burning cigarette yielded a reasonable result.