The burning and pollutant formation processes during cigarette smoking under various inhalation frequency

• Published in: Thermochimica acta Vol. 717; p. 179348
• Main Authors: Deng, Banglin, Chen, Mingmin, Wu, Shiyun, Liu, Shaohui, Liu, Aodong, Li, Qing, Duan, Xiongbo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2022
• Subjects: Burning; Cigarette smoking; Hazardous nanoparticles; Inhalation frequency; Toxic gasses; Cigarette smoking; Hazardous nanoparticles; Inhalation frequency; Burning; Toxic gasses
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2022.179348

•A self-developed smoking machine was used to simulate smoking during test.•An uncertainty analysis was systematically performed through multi methods.•Pollutants decrease with interval time in mainstream smoke, while CO, NOx did not change monotonously in side stream smoke.•Relationship between combustion/pyrolysis and pollutant formation was analyzed in detail.
In current study, particle number (PN), CO, HC and NOx in both main and side stream smoke were measured, the pyrolysis of tobacco leaf was measured by differential scanning calorimeter and the morphology of leaf was observed by laser scanning confocal microscope. Main findings are: the diameter of the particulate matter was changed between 10 nm to 80 nm; pollutants in main stream smoke decrease with interval time; PN and HC in side stream smoke increase with interval time. But for CO and NOx exposure in side stream smoke, the highest amount appeared at interval 3 s followed by 4 s and then 9 s. So, the common smoking habits did not achieve the best trade-off between inhaled and exposure amount. The test uncertainty was analyzed in detail. So the present study is to provide a good demonstration for smoking research and implications for improvement of smoking habit.