Authors: Athina Pappa K Mikedi N Tzamtzis M Statheropoulos
Publish Date: 2006/05/26
Volume: 84, Issue: 3, Pages: 655-661
Abstract
Thermogravimetrymass spectrometry TGMS was used to study the effect of the inorganic salts NH42SO4 and NH42HPO4 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 NH42SO4 seemed to have negligible effect on the pyrolysis of lignin while NH42HPO4 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 pineneedles mainly the cellulose component but the effects were not as intense as in the pyrolysis of cellulose
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