期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 163, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jaap.2022.105480
关键词
Carbon-heated tobacco product; Computational fluid dynamics; Puffing; Nicotine; Heat transfer mechanism
资金
- KTG Corporation
- Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry, and Energy of the Republic of Korea [20204030200030]
This study investigates the heat transfer mechanism and pyrolysis characteristics of carbon-heated tobacco products (CHTPs) using computational fluid dynamics (CFD) modeling. The results show that hole location and puffing significantly affect the temperature distribution and yields of volatile species in the tobacco. Air flow rate through the hole is a significant factor for nicotine yield distribution.
Carbon-heated tobacco products (CHTPs) recently emerged as a type of safer nicotine product. To prevent the discharge of harmful substances, the heating and pyrolysis of tobacco should be precisely controlled. Herein, we investigate the heat transfer mechanism and pyrolysis characteristics of tobacco using computational fluid dynamics (CFD) modeling of a CHTP. In addition, we analyze the yields of volatile species, the thermal stability of the CHTP during pyrolysis, and the optimal combination of holes. We also fabricated a prototype heat source and used the temperature distribution thereof in the CFD modeling. Using one particular hole location, puffing exhibited a significant effect on the temperature distribution of the tobacco plug and the yields of volatile species. Furthermore, in terms of nicotine yield distribution, the air flow rate through this hole was a significant factor. However, an extremely high air flow rate increased the yields of harmful substances by leveling the temperature of the tobacco plug. In the cases investigated, the maximum overall nicotine yield was 81.1%, while nicotine, tar, CO, and other gases were obtained in respective yields of 76%, 75%, 26%, and 63% under the condition minimizing the ratio between the combined yield of harmful substances and the yield of nicotine. To the best of our knowledge, this is the first published CFD study regarding CHTPs and yields valuable insight into their manufacturing parameters.
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