...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental research >Volatile aldehyde emissions from 'sub-ohm' vaping devices
【24h】

Volatile aldehyde emissions from 'sub-ohm' vaping devices

机译：'子欧姆'蒸磨装置的挥发醛排放量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

"Sub-ohm" atomizers with reduced resistance can deliver more power than conventional electronic cigarettes. Typical battery outputs are 100 W or more. These devices are particularly popular among young users, and can be a significant source of volatile carbonyls in the indoor environment. Emissions from next-generation sub-ohm vaping products were characterized by determining e-liquid consumption and volatile aldehydes emissions for several combinations of popular high-power configurations. Tests explored the effect of dilution air flow (air vent opening), puffing volume, and coil assembly configuration. The mass of liquid consumed per puff increased as the puff volume increased from 50 to 100 mL, then remained relatively constant for larger puff volumes up to 500 mL. This is likely due to mass transfer limitations at the wick and coil assembly, which reduced the vaporization rate at higher puff volumes. Carbonyl emission rates were systematically evaluated using a 0.15 Ω dual coil atomizer as a function of the puffing volume and dilution air flow, adjusted by setting the air vents to either 100% (fully open), 50%, 25%, or 0% (closed). The highest formaldehyde emissions were observed for the lowest puff volume (50 mL) when the vents were closed (48 ng mg~(-1)), opened at 25% (39 ng mg~(-1)) and at 50% (32 ng mg~(-1)). By contrast, 50-mL puffs with 100% open vents, and puff volumes >100 mL for any vent aperture, generated formaldehyde yields of 20 ng mg~(-1) or lower, suggesting that a significant cooling effect resulted in limited carbonyl formation. Considering the effect of the coil resistance when operated at a voltage of 3.8 V, the amount of liquid evaporated per puff decreased as the resistance increased, in the order of 0.15 Ω > 0.25Ω > 0.6 Ω, consistent with decreasing aerosol temperatures measured at the mouthpiece. Three different configurations of 0.15 Ω coils (dual, quadruple and octuple) were evaluated, observing significant variability. No clear trend was found between carbonyl emission rates and coil resistance or configuration, with highest emissions corresponding to a 0.25 Ω dual coil atomizer. Carbonyl emission rates were compared with those determined using the same methodology for conventional e-cigarettes (lower power tank systems), observing overall lower yields for the sub-ohm devices.
机译：具有降低电阻的“子欧姆”雾化器可以提供比传统电子卷烟更多的功率。典型的电池输出为100 W或更高。这些设备在年轻用户中特别受欢迎，并且可以是室内环境中挥发性羰基的重要来源。下一代亚欧姆的排放是通过测定e-液体消耗和挥发性醛排放来进行多次组合的液体消耗和挥发性的高功率配置。测试探索了稀释空气流（通风口开口），膨化体积和线圈组装配置的影响。随着粉扑体积从50至100毫升增加，每次消耗的液体的质量增加，随后较大的粉碎量高达500ml，仍然相对恒定。这可能是由于芯片和线圈组件的质量传递限制，这减小了更高泡芙体积的蒸发速率。使用0.15Ω双线圈雾化器来系统地评估羰基发射率作为膨化体积和稀释空气流动，通过将空气通风口设置为100％（完全打开），50％，25％或0％（关闭）。当封闭通风口（48ng mg〜（-1））关闭时，观察到最低的粉碎体积（50ml），以25％开（39ng mg〜（-1））和50％（ 32 ng mg〜（-1））。相比之下，具有100％开口通风口的50毫升吹气，以及任何通气孔的PUFF体积> 100ml，产生20ng mg〜（-1）或更低的甲醛产率，表明显着的冷却效果导致有限的羰基形成。考虑到在3.8V的电压下操作时螺旋电阻的影响，由于电阻增加，每次浮出量的液体量减小，大约为0.15Ω>0.25Ω>0.6Ω，这与降低测量的气溶胶温度降低喉舌。评估了三种不同的0.15Ω线圈（双，四重和八零）配置，观察显着的变化。羰基排放率和钢丝电阻或配置之间没有发现明确趋势，具有对应于0.25Ω双线圈雾化器的最高排放。将羰基发射率与使用相同的传统电子烟（较低功率罐系统）确定的那些进行比较，观察子欧姆器件的总收益率。

著录项

  • 来源
    《Environmental research》 |2021年第2期|111188.1-111188.7|共7页
  • 作者

    Lucia Cancelada; Xiaochen Tang; Marion L. Russell; Randy L. Maddalena; Marta I. Litter; Lara A. Gundel; Hugo Destaillats;

  • 作者单位

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States Division Quimica de La Remediation Ambiental CNEA-CONICET Avenida Gral. Paz 1499 (1650) San Martin Buenos Aires Argentina;

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States;

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States;

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States;

    Division Quimica de La Remediation Ambiental CNEA-CONICET Avenida Gral. Paz 1499 (1650) San Martin Buenos Aires Argentina Instituto de Investigation e Ingenieria Ambiental Universidad de General San Martin Campus Miguelete Av. 25 de Mayo y Francia (1650) San Martin Bs Aires Argentina;

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States;

    Indoor Environment Group Lawrence Berkeley National Laboratory 1 Cyclotron Road MS70-108B Berkeley CA 94720 United States;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Formaldehyde; Carbonyls; e-cigarettes; MODs; Aerosols; Sub-ohm;

    机译：甲醛;羰基;电子香烟;mods;气溶胶;亚欧姆;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号