Study On The Release Of CO、Bap、NNK And Phenol In Cigarette Smoke By Thermogravimetry And Pyrolysis Combustion Platform

With the rising voice of anti-smoking campaigns in the world and the growing concern about health problems,tobacco consumers have put higher demands on cigarette safety.Study of harmful components in flue gas has very important significance to improve the quality of cigarette products and commercial value.Tobacco science and technology workers should be in the construction of tobacco harm reduction technology system and the creation of tobacco brand on the basis of low hazard,and gradually establish the release of harmful components and harm reduction core technology of the mainstream cigarette smoke advantages,to provide the theoretical basis and technical support for the development of the development of Chinese-style cigarettes and new non-combustion tobacco products.In this paper,the release of harmful components CO,Bap,NNK and phenol in cigarette smoke was studied by means of thermogravimetric and rapid pyrolysis combustion experiment platform.In this study,tobacco was divided into four main components,namely,volatile components,hemicellulose,cellulose and lignin by thermogravimetric experiment,to find the contents of different components and the decomposition range and form a set of standard methods.At the same time,the reaction temperature and residence time were controlled by the self-developed experimental platform suitable for rapid pyrolysis of tobacco,to the release of harmful components in flue gas at each temperature,and compared with four main components decomposition of the decomposition of the interval to find the tobacco components on the harmful components of flue gas CO,Bap,NNK and phenol contribution and mathematical relationship,finally established by thermogravimetric method experimentation predicted emissions of harmful components in flue gas.The results showed that the pyrolysis temperature in different atmospheres CO mainly generated is about 300 ℃,the increase of oxygen concentration can promote the formation of pyrolysis of CO in flue gas,the release amount of CO and the total mass loss of coke and lignin have good mathematical relationship;In the air,Bap mainly formed at 200～400 ℃,pyrolysis in a nitrogen,the main generation interval Bap is at 300～500 ℃,under different atmosphere,no significant differences in the amount of Bap in the flue gas,the release amount of Bap and the total mass loss of cellulose and lignin has a good linear relationship;In the pyrolysis of air,the main generation interval of NNK is 150～250 ℃.The existence of oxygen greatly promotes the formation of NNK during the pyrolysis process.The NNK in the flue gas is partly from the migration of tobacco,and the amount of NNK released from the pyrolysis of tobacco pyrolysis has a good mathematical relationship with the content of nicotine and reducing sugar.Nitrates and nitrites can promote the pyrolysis of tobacco NNK production,and add antioxidants can inhibit the formation of NNK;Tobacco pyrolysis in a nitrogen atmosphere,the main production of phenol is interval at 200-400 ℃,phenol production and 200～400 ℃ the temperature range of tobacco samples pyrolysis mass loss amount of hemicellulose,cellulose and lignin have good mathematical relationship.The mathematical relationship can indirectly predict the contribution of the corresponding components to the release of harmful substances in the process of cigarette combustion.Because it is not necessary to extract and determine the precursors of harmful substances,this method has a better application prospect.