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Volatile carbonyl compounds in cigarette mainstream smoke of an important class of harmful ingredients, seriously affecting the quality and suction cigarette health of consumers. Mainstream smoke reduction of carbonyl compounds in the volatile content of the tobacco industry in the development process faces a major challenge. Based on the comparison of potential adsorption material of the carbonyl compound based on the adsorption properties of acetaldehyde screened having a strong adsorption capacity of the material and its modification, further modification of acetaldehyde good adsorption material is added to the cigarette filter mouth, its lower mainstream smoke effects of content of carbonyl compounds were evaluated. Research first established a method for determining the rate of absorption of acetaldehyde adsorption experimental apparatus and the experimental conditions were optimized. In the experimental apparatus, the adsorbent material by measuring the adsorption of acetaldehyde gas sealed bottle headspace concentration of acetaldehyde due to changes in the adsorption properties of the materials can be evaluated. Simulation apparatus operating parameters are: acetaldehyde concentration of 0.4% (w / w), the adsorbent is 0.8 g, the temperature was 35 ℃, adsorption time is 48 h. In this condition, activated carbon, sodium hydrogen sulfite, sodium carbonate, potassium carbonate, degumming of silk, melamine and chitosan adsorption performance measured, the results show that the activated carbon, sodium bisulfite, acetaldehyde chitosan adsorption rate is higher, respectively, 22.3%, 51.9% and 51.0%, other materials on acetaldehyde adsorption effect is not obvious. With an acid, alkali, oxidizing agents, polyamino substance, chitosan and copper sulfate was modified activated carbon experimental results showed that: the modified chitosan and copper activated carbon obtained by the best adsorption acetaldehyde. In the chitosan concentration of 1% (w / w), through the single factor experiment to determine the optimal modification conditions: temperature 20 ℃, pH 4.8, time 10 h, copper sulfate solution (water: copper = 13: 1) 10 g, under optimal conditions of the modified activated carbon adsorption performance than the original increase of 42.3%. With different drying methods, complexation of copper ions, Zhijie β-cyclodextrin and polyethylene polyamine, and other methods of producing metal microspheres of chitosan was modified. The results showed that: a modified spray drying to obtain the best adsorption properties of chitosan. When chitosan concentration 1.5% (w / w), air inlet temperature 160 ℃, 80 ℃, outlet temperature, spray drying the resulting modified chitosan adsorption increased compared with 37.7% in the original chitosan. Chitosan and copper sulfate modified activated carbon added to the cigarette filter application experiments carried out, the results showed that: modified activated carbon to reduce tar, nicotine, carbon monoxide and at the same time increase the moisture content of the mainstream smoke of carbonyl compounds a significant reduction effect, when the addition amount of 20 mg modified activated when the quality of the cigarette has little effect on the suction, and the mainstream smoke of volatile carbonyl compounds in a reduced content of 45.0%, far higher than the original Activated carbon is 30.6%.
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