应用改性ACF选择性脱除卷烟烟气中的有害物质
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摘要
对于中国烤烟型卷烟,选择性降低烟气中有害物质的含量,尽可能保持其固有的香味、口感和生理强度,是烟草行业长期以来一直追求的目标和研究热点,也是环境领域的一个世界性难题。
本课题针对烤烟型卷烟烟气中有害物质的特点,以粘胶基活性炭纤维为基材,利用低温等离子体对ACF进行表面物理改性,利用扫描电镜(SEM)、X射线光电子能谱(XPS)和表面积孔隙度分析仪对改性ACF的表面结构进行表征。通过实验探究了在不同气氛、不同放电电压与放电时间下的改性对ACF吸附甲醛效果的影响和变化规律。并且遴选出最佳工况下的ACF材料,对其进一步进行化学改性,负载纳米TiO2、Cu、Pd等具有选择性催化一氧化功能的物质,制成改性ACF复合功能材料,将其与醋酸纤维按一定比例制成新型的二元复合滤嘴,在不改变卷烟原有香气和吃味,对人体无任何额外毒副作用的前提下,选择性高效降低卷烟烟气中焦油、CO、苯并[a]芘的含量,通过对改性材料的表征,推测了可能的降害机理,为今后优化实验方案提供理论依据。
本技术具有良好的应用前景,在完成实验室研究的基础上,如能尽快中试研究,解决产业化过程中可能会出现的问题,将本作品大规模应用于卷烟生产,必将产生巨大的社会效益和经济效益。
For Chinese Virginia type cigarette, how to selectively lower the content of harmful components in the cigarette smoke and keep the intrinsic fragrance sensory and physiologic infensity is a popular objective and research issue for the tobacco industry, as well as a global difficulty for the environmental field.
This project, specific to the features of harmful components in the Virginia type cigarette, uses VACF (viscose-fiber-based activated carbon fiber) as basic material, surface modification was performed by means of non-thermal plasma, SEM, XPS and specific area/porosity analyzer were used to characterize the physical property of the surface structure of ACF after modification. The effects of different modifications with respect to gas, discharging voltage and discharging time on the formaldehyde absorption efficiency of ACF were also studied. And then loads substances having adsorb-catalyze function, such as nano-TiO2 Cu, Pd, and forms new function materials, resulting into dual-filter with cellulose fiber in a definite proportion. This new cigarette can reduce the tar, CO, Benzo [a] pyrene selectively and efficiently without change fragrance and tastity of the cigarette, while in the precondition of having no other accessory poison functions. It also predict mechanism of possibly reducing the harmful components by characterization the new function materials, which provides theoretic basement for further optimizing experiments.
This technique has great prospect in practice. If employed in mass production, based on laboratory research after solving possible problems in the process of production, it will lead to enormous social effect and economic effect.
本课题针对烤烟型卷烟烟气中有害物质的特点,以粘胶基活性炭纤维为基材,利用低温等离子体对ACF进行表面物理改性,利用扫描电镜(SEM)、X射线光电子能谱(XPS)和表面积孔隙度分析仪对改性ACF的表面结构进行表征。通过实验探究了在不同气氛、不同放电电压与放电时间下的改性对ACF吸附甲醛效果的影响和变化规律。并且遴选出最佳工况下的ACF材料,对其进一步进行化学改性,负载纳米TiO2、Cu、Pd等具有选择性催化一氧化功能的物质,制成改性ACF复合功能材料,将其与醋酸纤维按一定比例制成新型的二元复合滤嘴,在不改变卷烟原有香气和吃味,对人体无任何额外毒副作用的前提下,选择性高效降低卷烟烟气中焦油、CO、苯并[a]芘的含量,通过对改性材料的表征,推测了可能的降害机理,为今后优化实验方案提供理论依据。
本技术具有良好的应用前景,在完成实验室研究的基础上,如能尽快中试研究,解决产业化过程中可能会出现的问题,将本作品大规模应用于卷烟生产,必将产生巨大的社会效益和经济效益。
For Chinese Virginia type cigarette, how to selectively lower the content of harmful components in the cigarette smoke and keep the intrinsic fragrance sensory and physiologic infensity is a popular objective and research issue for the tobacco industry, as well as a global difficulty for the environmental field.
This project, specific to the features of harmful components in the Virginia type cigarette, uses VACF (viscose-fiber-based activated carbon fiber) as basic material, surface modification was performed by means of non-thermal plasma, SEM, XPS and specific area/porosity analyzer were used to characterize the physical property of the surface structure of ACF after modification. The effects of different modifications with respect to gas, discharging voltage and discharging time on the formaldehyde absorption efficiency of ACF were also studied. And then loads substances having adsorb-catalyze function, such as nano-TiO2 Cu, Pd, and forms new function materials, resulting into dual-filter with cellulose fiber in a definite proportion. This new cigarette can reduce the tar, CO, Benzo [a] pyrene selectively and efficiently without change fragrance and tastity of the cigarette, while in the precondition of having no other accessory poison functions. It also predict mechanism of possibly reducing the harmful components by characterization the new function materials, which provides theoretic basement for further optimizing experiments.
This technique has great prospect in practice. If employed in mass production, based on laboratory research after solving possible problems in the process of production, it will lead to enormous social effect and economic effect.
引文
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