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CORESTA Meeting, Smoke/Technology, Xian, 2001, ST 24

Cigarette combustion during a puff

YAMADA Y.
Japan Tobacco Inc., Tobacco Science Research Lab., Yokohama, Kanagawa, Japan.

Smoking conditions dominate the behaviour of cigarette combustion that, in turn, affects the yield of smoke components. In order to clarify the influences of smoking conditions on cigarette combustion, the change of burning rate during a puff at various puff volumes was studied. The gas phase of mainstream smoke during a puff was sampled at several time points and the oxygen, carbon monoxide, and carbon dioxide concentrations were measured. The oxygen consumption rate at each time point was calculated from the measured data. The results showed that the oxygen consumption rate changed during a puff and the puff volume affected the behaviour of the cigarette combustion. At a 10 ml puff volume, the oxygen consumption rate increased monotonically but, at a 55 ml puff, the consumption rate reached a maximum point. The carbon monoxide concentration at a 10 ml puff volume is lower than that at a 55 ml puff volume. On the other hand, the carbon dioxide concentration at a10ml puff volume is higher than that obtained at a 55ml puff volume. These results suggest that the burning phenomena are complex and the burning processes differ depending on puff volume. It is hypothesized that the differences in the burning processes and the degree of oxidation cause the differences in smoke component yields.