卷烟在抽吸过程中会发生一系列复杂的物理和化学变化,包括水分蒸发、有机物热解和焦炭燃烧等,烟丝的热解和燃烧行为对卷烟口感和有害物质的生成有重要影响,因此是实现降焦减害的关键所在。 本研究首先用热重-质谱联用技术研究了氧气对烟丝燃烧的影响。结果表明:①当温度低于513K时,烟丝以热解反应为主,氧气对烟丝热解行为的影响较小,而当温度高于513K时,热解和燃烧同时发生。②氧气可促进烟丝的燃烧,氧气浓度越高,燃烧温度降低,燃烧速率越快;③在各种燃烧产物中,水和二氧化碳的释放量随氧气浓度的升高而增加,而氢氰酸、烟碱、苯酚和吲哚等在有氧条件下的释放量极小。因此可通过增加氧气浓度来降低烟气有害成分释放量。 ...During the smoking of cigarette, complex physical and chemical reactions occur, such as evaporation of water, pyrolysis of organic substances and combustion of char. The pyrolysis and combustion behavior of cut tobacco affects the taste of cigarette and the amount of harmful substances generated, and is thus the key to diminish the generation of tar and reduce the health risk of smoking. At least,...学位:工程硕士院系专业:化学化工学院_化学工程学号:2062013115148