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- Title
APPLICATION RANGE OF NANOCATALYSTS FOR CO OXIDATION IN MAINSTREAM CIGARETTE SMOKE.
- Authors
IVANOV, K.; DIMITROV, D.; TABAKOVA, T.; KIRKOVA, S.; STOILOVA, A.
- Abstract
It has been suggested that nicotine, CO and tar in mainstream smoke are the most important substances and have been judged as the most harmful compounds, responsible for the health hazards of smoking. As nicotine is extremely important for smoking qualities of cigarettes and the tar yield in the tobacco smoke is significantly reduced due to the use of filters with various content and design, the main efforts of cigarettes researchers and manufacturers are related to the search of opportunities for CO content reduction. Its catalytic conversion to CO2 seems to be the most viable abatement route. The catalyst was prepared by the deposition-precipitation method and the possibilities for CO oxidation in the synthetic gaseous mixture were evaluated using continuous flow equipment with fixed bed glass reactor at atmospheric pressure. The efficiently of the catalyst in CO oxidation in the real cigarette smoke was examined by a single port, puff-by-puff smoking machine. Quality assessment of smoking using cigarette holder containing catalyst was carried out. Highly active ceria-supported gold catalyst for CO oxidation was synthesised. Despite this result, the catalytic activity towards CO oxidation in cigarette smoke rapidly decreases from 70% for the first cigarette to nearly zero for the twentieth cigarette. The present study shows that there are two critical factors which do not permit the successful use of catalysts to reduce the CO content in the mainstream cigarette smoke: (i) significant influence of the processes of adsorption and oxidation on the main characteristics of tobacco products, and (ii) rapid deactivation of the catalyst due to the covering of the catalyst grains with condensate.
- Subjects
CATALYSTS; OXIDATION; CIGARETTE smoke; NICOTINE; TAR
- Publication
Oxidation Communications, 2018, Vol 41, Issue 1, p1
- ISSN
0209-4541
- Publication type
Article