Isothermal soot oxidation experiments with intermediate gas change in a Perkin-Elmer TGA6

• Published in: Journal of thermal analysis and calorimetry 2009, Vol.95 (1), p.141-147
• Main Authors: Kalogirou, Maria, Pistikopoulos, P., Ntziachristos, L., Samaras, Z.
• Format: Article
• Language: English
• Subjects: Air pollution caused by fuel industries; Analytical Chemistry; Applied sciences; Chemistry; Chemistry and Materials Science; Crude oil, natural gas and petroleum products; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fuels; Inorganic Chemistry; Measurement Science and Instrumentation; Physical Chemistry; Pollution reduction; Polymer Sciences; Prospecting and production of crude oil, natural gas, oil shales and tar sands
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-008-9156-2

Two isothermal soot oxidation protocols were tested in a Perkin-Elmer TGA6: (1) the sample was heated under N 2 and then the reaction gas was introduced and (2) the sample was introduced after the empty furnace was heated under the reaction gas. The first protocol is common in soot oxidation studies, it gives a measure of the volatiles and is easier to handle, but as it is shown the determined reaction rate may be falsified by the O 2 concentration. Using gas analysis it was found that ∼2000 s are necessary for the complete gas change in the instrument. An instrument specific correction function involving the O 2 concentration and reaction order n with respect to O 2 was developed which allowed the correlation of the rates measured with both protocols.