模拟裂解条件对卷烟烟气挥发性羰基化合物的影响

Effects of Simulated Pyrolytic Conditions on Volatile Carbonyls in Cigarette Smoke

为了考察裂解条件对甲醛、乙醛、丙酮、丙烯醛、丙醛、巴豆醛、2-丁酮和丁醛8种挥发性羰基化合物释放量的影响，基于自行设计的卷烟燃吸模拟装置建立了烟丝裂解产物中挥发性羰基化合物的捕集分析方法，并分析了烤烟型和混合型卷烟配方烟丝在不同裂解条件下产生的挥发性羰基化合物。结果表明：①该方法测定的烟丝裂解产物中8种挥发性羰基化合物的相对标准偏差（RSD）均小于10％；②随着裂解气氛中O：含量的升高，除2-丁酮和丁醛外，其余6种羰基化合物的释放量均增加；③随着裂解载气流量的增大，甲醛的释放量显著增加，而其余7种羰基化合物的释放量变化较小；④随着升温速率的提高，甲醛和丙醛的释放量明显增加，乙醛、丙酮、丙烯醛的释放量也有不同程度增加，而巴豆醛、2-丁酮和丁醛的释放量基本未受影响；⑤在400～500℃下，各挥发性羰基化合物的释放量最大，且相同温度下，烤烟型卷烟烟丝的甲醛释放量显著高于混合型卷烟烟丝。

In order to investigate the effects of pyrolytic conditions carbonyls, including formaldehyde, acetaldehyde, acetone, acrolein, on the deliveries of eight volatile propionaldehyde, crotonaldehyde, 2-butanone and butyraldehyde, in cigarette smoke, a method for trapping and analyzing the volatile carbonyls in the pyrolytic products of tobacco shreds was developed based on an in-house cigarette smoking simulator. The volatile carbonyls in the pyrolysis products of Virginia and blended type cigarette filler under different pyrolytic conditions were analyzed. The results showed that： 1） The relative standard deviations of the tested eight carbonyls were all less than 10% under the same pyrolytic condition. 2） With the increase of 02 content in pyrolytic atmosphere, the deliveries of carbonyls increased except for 2-butanone and butyraldehyde. 3） With the increase of pyrolytic gas flow, the delivery of formaldehyde increased significantly, while the other carbonyls changed slightly. 4） With the raise of heating rate, the deliveries of formaldehyde and propionaldehyde increased significantly, those of acetaldehyde, acetone and acrolein increased to different extents, while those of crotonaldehyde, 2-butanone and butyraldehyde were basically not affected. 5） The deliveries of carbonyls topped at 400-500 ~C. Moreover, the formaldehyde delivery of Virginia type cigarette filler was significantly higher than that of blended type one at the same temperature.