Abstract Background Accurate diagnostics of key thermophysical and thermochemical parameters in multi-phased combustion phenomena is essential for understanding formation mechanisms of reaction products. Aim To combine simultaneous temperature and pressure measurements with fast in-situ chemical sampling techniques within a superslim cigarette to: (1) obtain detailed physical and chemical information from this dynamic combustion system in response to an externally applied air flow, and (2) demonstrate the comprehensive capabilities of the approach in deducing mechanistic information about complex chemical reactions. Methods A micrometre sampling stage was used to accurately position the in-situ sampling probes for insertion into the cigarette. An array of 0.254-mm thermocouples (for gas-phase temperature) and multiple 0.35-mm diameter quartz tubes connected to transducers (to measure pressure), were inserted into the superslim cigarette. For chemical analysis, a single heated 0.5-mm chemical sampling microprobe was also inserted, and coupled to a single-photon soft ionisation (SPI) mass spectrometer through a heated transfer line. The different measurement techniques were synchronised by mapping two probes at a time (e.g. temperature/pressure or temperature/chemistry); the physical and chemical events were visualised and mapped using dedicated software to integrate the various data sets. Results The highly heterogeneous combustion system was characterised using a series of temperature, gas flow velocity maps. The complex and dynamic variations in thermochemical events occurring within the cigarettes were monitored by following three marker compounds, NH3, indole and nicotine. The time- and spatially resolved formation maps for these compounds illustrated the operation of thermal desorption, pyrolysis and combustion-led processes within the cigarette, following application of an externally applied air flow. Conclusion By integrating two physical sensors with fast chemical sampling, the burning of a superslim cigarette has studied in-situ in unparalleled detail. The experimental setup enabled complex combustion diagnostics within a confined but dynamic geometry.

中文翻译：

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将时间和空间分辨原位温度和压力测量与燃烧的超细香烟内的软电离质谱相结合

摘要背景准确诊断多相燃烧现象中的关键热物理和热化学参数对于理解反应产物的形成机制至关重要。目的 将同步温度和压力测量与超细卷烟内的快速原位化学采样技术相结合，以：（1）从响应外部施加的气流的动态燃烧系统中获取详细的物理和化学信息，以及（2）证明该方法在推断复杂化学反应的机械信息方面的综合能力。方法 使用微米取样台准确定位原位取样探针以插入香烟。一组 0.254 毫米热电偶（用于气相温度）和多个 0。将连接到传感器（以测量压力）的 35 毫米直径石英管插入超细香烟中。对于化学分析，还插入了单个加热的 0.5 毫米化学采样微探针，并通过加热传输线耦合到单光子软电离 (SPI) 质谱仪。通过一次绘制两个探针（例如温度/压力或温度/化学）来同步不同的测量技术；物理和化学事件使用专用软件进行可视化和映射，以整合各种数据集。结果 使用一系列温度、气体流速图表征高度异质燃烧系统。卷烟内发生的热化学事件的复杂动态变化通过以下三种标记化合物 NH3、吲哚和尼古丁。这些化合物的时间和空间解析形成图说明了在应用外部空气流后，卷烟内的热解吸、热解和燃烧主导过程的操作。结论 通过将两个物理传感器与快速化学采样相结合，对超细卷烟的燃烧进行了无与伦比的原位详细研究。实验装置能够在有限但动态的几何形状内进行复杂的燃烧诊断。对超细香烟的燃烧进行了无与伦比的原位研究。实验装置能够在有限但动态的几何形状内进行复杂的燃烧诊断。对超细香烟的燃烧进行了无与伦比的原位研究。实验装置能够在有限但动态的几何形状内进行复杂的燃烧诊断。