Effects of Varying Tobacco Rod Circumference on Cigarette Combustion: An Experimental Investigation

Abstract

SummaryTo study the effects of tobacco rod circumference on cigarette combustion status, cigarettes were made with three different circumferences of 24 mm, 20 mm, 17 mm and otherwise identical construction. Their combustion characteristics, including combustion coal volume, characteristic temperature distribution, heating rate, instantaneous burn rate, and yields of selected mainstream smoke chemicals, were systematically measured. The results indicated that the cigarettes with the lowest circumference of 17 mm showed higher combustion temperatures with a smaller coal volume. The maximum instantaneous burn rate was distinctly different for the three cigarettes, from 1.84 mm/s to 2.48 mm/s, when their circumference was reduced from 24 mm to 17 mm. The tobacco mass consumption per puff showed a negative trend when the circumference decreased. The majority of the chemical compounds (16 of 21) measured in mainstream smoke decreased when the circumference was reduced, except for formaldehyde, while the yields of the chemical compounds produced per weight of cut tobacco, consumed during puffing, showed an obverse trend.

Effects of Varying Tobacco Rod Circumference on Cigarette's Dynamic Ventilation Rate and Combustion State During Machine Smoking

“…With the increase of cigarette circumference, the combustion coal volume increased, and the characteristic temperature decreased. The results indicate that the proportion of higher temperature volume of the combustion coal at 17 mm circumference was higher than that of the other two cigarettes, which is consistent with the results of DENG et al (22). To statistically test whether these temperature parameters differed significantly between puffs, one-way ANOVA was used, in which the temperature parameters were the dependent variables and the puff number was the independent variable.…”

“…A CP224S electronic balance (0.0001 g, Sartorius AG, Göttingen, Germany) was used to weigh cigarettes. Eight K-type micro thermocouples ( 0.254 mm, Omega, Norwalk, CT, USA) and their clamping and insertion module have been described before (22). To verify the accuracy of the selfmade ventilation measuring device, a KT-DC Cigarette test station with ventilation test module (Körber Technologies Instruments GmbH, Hamburg, Germany) was also used to test the ventilation rate of cigarettes.…”

“…20 mm) have increased in China. Some studies on the influence of circumference have been published (22,23), but there is a lack of detailed research on the ventilation and combustion interaction on a puff-by-puff basis, which could provide more mechanistic insights on the smoke generation. This study tested the dynamic ventilation of cigarettes with different circumferences (17 mm, 20 mm and 24 mm), and the ventilation distribution of the cigarettes during smoking was systematically investigated in combination with a puff-by-puff combustion state characterization.…”

Integration of Time and Spatially Resolved In-Situ Temperature and Pressure Measurements With Soft Ionisation Mass Spectrometry Inside Burning Superslim and King-Size Cigarettes

“…To describe the cigarette burning process in detail, several parameters (T 0.5 , V 0 , T max ) were defined and measured, together with three sets of burn rate, providing a comprehensive picture of this highly heterogeneous combustion system (21,22,13). T max was the maximium gas-phase temperature in the burning coal, T 0.5 was the average temperature of the hotter 50%-volume of the burning coal, and V 0 was the cumulative coal volume above 200 °C.…”