Authors:
Athina Pappa National Technical University of Athens (NTUA) Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering Athens Greece 157 73 9 Iroon Polytechniou Str. Athens Greece 157 73 9 Iroon Polytechniou Str.

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K. Mikedi National Technical University of Athens (NTUA) Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering Athens Greece 157 73 9 Iroon Polytechniou Str. Athens Greece 157 73 9 Iroon Polytechniou Str.

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N. Tzamtzis National Technical University of Athens (NTUA) Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering Athens Greece 157 73 9 Iroon Polytechniou Str. Athens Greece 157 73 9 Iroon Polytechniou Str.

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M. Statheropoulos National Technical University of Athens (NTUA) Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering Athens Greece 157 73 9 Iroon Polytechniou Str. Athens Greece 157 73 9 Iroon Polytechniou Str.

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Abstract  

Thermogravimetry-mass spectrometry (TG-MS) was used to study the effect of the inorganic salts (NH4)2SO4 and (NH4)2HPO4, active substances of many commercial forest fire retardants, on the pyrolysis of Pinus halepensis needles and their main components (cellulose, lignin and extractives). These salts seemed to affect the pyrolysis of cellulose by increasing significantly the char residue, decreasing the pyrolysis temperature and changing the composition of the evolved gases, that is, increasing levoglucosenone and decreasing oxygen containing volatile products. (NH4)2SO4 seemed to have negligible effect on the pyrolysis of lignin, while (NH4)2HPO4 increased the char residue and decrease the relative contribution of guaiacols in the evolved gases. No effects of the inorganic salts on the extractives were observed. Finally, the inorganic salts seemed to affect the pyrolysis of pine-needles, mainly the cellulose component, but the effects were not as intense as in the pyrolysis of cellulose.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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