Investigation of the Pyrolysis Behavior of Hemp Pulp Cigarette Paper

The pyrolysis behavior of hemp pulp cigarette paper was investigated using thermal mass loss (TG) and pyrolysis gas chromatography-mass spectrometry (PyGC/MS). In helium atmosphere, the compound was pyrolyzed at 400, 500, 600, 700, 800 and 900 ℃, respectively. The pyrolysis products were directly introduced into GC/MS with two columns (PE-Elites 5MS capillary column and PE-Elites Wax capillary column)， and were qualitatively and semi-quantitatively analyzed. At the six pyrolysis temperatures mentioned above, complex pyrolysis products are formed， and 202 products are detected altogether, including alkenes, ketones, acids, benzene, benzene derivatives and PAHs. Moreover, with the elevation of the pyrolysis temperature, the contents of alkenes and ketones are decreasing, and the contents of benzene, benzene derivatives and PAHs are increasing gradually. 63 products are detected by both 5MS and Wax capillary column. 93 pyrolysis products of hemp pulp cigarette paper are detected with Wax column， which can not detected by 5MS. While 46 pyrolysis products are detected with 5MS column， which can not be detected by Wax column. The main difference between the two columns is due to the type and nature of the stationary phase of columns.