Abstract The effect of temperature and gas residence time on the formation of 16 priority PAH from the ethanol pyrolysis, in the 975–1475 K temperature range, has been evaluated. Soot was quantified by weight difference of the collection filter and light gases were measured by gas chromatography and microchromatography. The PAH quantification was done by gas chromatography–mass spectrometry (GC–MS). The toxicity of the effluent was determined by the B[a]P-eq value with the concentration of the PAH found during the experiments. The principal results show that the PAH concentration presents a maximum with the temperature, which is shifted to lower temperatures as the gas residence time increases. The PAH with the highest concentration are: NAPH, ACNY, PHEN, FANTH and PYR, and they are mainly present adsorbed on soot. The highest toxicity, B[a]P-eq, of the effluent was found for the highest residence time, tr(s) = 4168/T (K), particularly on soot.

中文翻译：

---

乙醇热解过程中温度和气体停留时间对多环芳烃(PAH)形成的影响

摘要 在 975-1475 K 的温度范围内，温度和气体停留时间对乙醇热解形成 16 种优先多环芳烃的影响进行了评估。烟尘通过收集过滤器的重量差异定量，轻气体通过气相色谱法和微色谱法测量。PAH 的定量是通过气相色谱-质谱 (GC-MS) 完成的。流出物的毒性由 B[a]P-eq 值和实验过程中发现的 PAH 浓度决定。主要结果表明，PAH 浓度随温度升高而出现最大值，随着气体停留时间的增加，温度向较低温度移动。浓度最高的多环芳烃是：NAPH、ACNY、PHEN、FANTH和PYR，它们主要存在于吸附在烟尘上。最高的毒性，B[a]P-eq，