<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The total amounts of carbon monoxide (CO) and carbon dioxide (CO2) in the mainstream smoke of a burning cigarette during a steady draw were measured by a non-dispersive infrared (IR) technique for a variety of flow rates. The temperature profiles in the cigarette were also measured under the same flow conditions. The data were used in a diffusion model to estimate the concentrations of these gases downstream of the pyrolysis zone. The contribution of pyrolysis in the generation of these gases was calculated using a kinetic model. The remaining CO and CO2 are attributed to processes occurring in the combustion zone. The calculated mean concentrations of carbon oxides behind the pyrolysis zone are in reasonable agreement with the experimental data. The contributions of pyrolysis and combustion to the formation of CO were found to be approximately 1/3 and 2/3 respectively. The results show that the peak temperature rises with an increase in the mainstream flow rate in the limited range of 0 to 200 mL/min. As a result, the concentrations of carbon oxides behind the pyrolysis zone also increase with the flow rate and reach plateaus at higher flow rates.</p></abstract>

The total amounts of carbon monoxide (CO) and carbon dioxide (CO2) in the mainstream smoke of a burning cigarette during a steady draw were measured by a non-dispersive infrared (IR) technique for a variety of flow rates. The temperature profiles in the cigarette were also measured under the same flow conditions. The data were used in a diffusion model to estimate the concentrations of these gases downstream of the pyrolysis zone. The contribution of pyrolysis in the generation of these gases was calculated using a kinetic model. The remaining CO and CO2 are attributed to processes occurring in the combustion zone. The calculated mean concentrations of carbon oxides behind the pyrolysis zone are in reasonable agreement with the experimental data. The contributions of pyrolysis and combustion to the formation of CO were found to be approximately 1/3 and 2/3 respectively. The results show that the peak temperature rises with an increase in the mainstream flow rate in the limited range of 0 to 200 mL/min. As a result, the concentrations of carbon oxides behind the pyrolysis zone also increase with the flow rate and reach plateaus at higher flow rates.

Formation and Reduction of Carbon Monoxide

Philip Morris USA Research Center, P.O. Box 26583, Richmond, VA 23261, USA

Current Address: School of Engineering, VCU, Richmond, Virginia, USA

Contributions to Tobacco & Nicotine Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Formation and Reduction of Carbon Monoxide"}

The total amounts of carbon monoxide (CO) and carbon dioxide (CO2) in the mainstream smoke of a burning cigarette during a steady draw were measured by a...

Formation and Reduction of Carbon Monoxide

Pubblicato online: 30 dic 2014

Pagine: 439 - 447

Ricevuto: 11 set 2002

Accettato: 20 apr 2003

DOI: https://doi.org/10.2478/cttr-2013-0759

© 2014 Beiträge zur Tabakforschung International

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.