J. Anal. Appl. Pyrolysis

Mechanism of Autocatalysis in the Thermal Dehydrochlorination of Poly(vinyl chloride)

“…In any case, it now is apparent that the thermal degradation of PVC will produce many different cation radicals whose specific structures are determined by factors such as the lengths of the precursory neutral polyenes, the position(s) of polyene protonation, 33 cis-trans isomerism, 32,33,[39][40][41] and various reactions of the polyenes and cation radicals that change their sequence lengths. 33,40,[42][43][44] All of the cationic radical species are potentially able to abstract a hydrogen atom from the polymer.…”

How the polarity of the separation column may influence the characterization of compost organic matter by pyrolysis-GC/MS

“…2A). Pristene and phytadienes are pyrolysis products with isoprenoid structure, originating from the phytyl chain of chlorophyll [39]. Pyrrole (N7) and methyl-pyrroles (N8, N9) can also derive from the pyrolysis of chlorophyll [34,35], although, as noted above, these compounds may also be proteinderived [28,29].…”

Aromatization of organic matter induced by the presence of clays during flash pyrolysis-gas chromatography–mass spectrometry (PyGC–MS)

“…However, the presence of minerals and especially clays, frequent in soils and sediments can induce analytical artifacts [33][34][35][36][37][38]. More recently, several authors [39,40] have demonstrated that clay minerals (kaolinite and montmorillonite) can modify the molecular fingerprint of model compounds (alkanols and alkanoic acids), chlorophyll-a and soil organic matter (grass material) during flash pyrolysis.…”

“…Among these different analysis types, flash pyrolysis-gas chromatography-mass spectrometry (PyGC-MS) is frequently used for the characterization of fossil [8][9][10][11][12][13][14] or recent [15][16][17][18][19][20][21][22][23][24][25][26] macromolecular organic matter encountered in soils and sediments.…”