A tandem μ-reactor-gas chromatograph/flame ionisation detector (TR-GC/FID) system that allows hydrogen and steam injection, called H₂/steam-TR-GC/FID, was newly developed to quantitatively evaluate phenol recovery from the pyrolysis of bisphenol A (BPA), isopropyl phenol (iPrP), and isopropenyl phenol (IPP). Ni-Loaded Y-zeolite (Ni/Y) was selected to simultaneously catalyse BPA decomposition into phenol and IPP, IPP hydrogenation to iPrP, and iPrP dealkylation to phenol and propylene. These substrates were evaporated in the 1st μ-reactor, and then converted into phenol using Ni/Y-zeolite under H₂/steam flow in the 2nd μ-reactor. The products were directly introduced into GC/FID and quantified using naphthalene as the internal standard. Although the steam injection caused degradation of product peaks, this drawback was overcome by using two-step ice- and cryo-traps. The phenol yield was negligible when the three substrates were pyrolysed alone at 350 °C, but became substantially enhanced by the combination of H₂, steam, and Ni/Y, reaching the maximum of 89%, 46%, and 62% from iPrP, IPP, and BPA, respectively. Hence, these results indicate the possibility to obtain phenol-rich products from the pyrolysis of polymeric wastes with BPA macro skeleton. In addition, the developed high-throughput analytical technique can accelerate the development of other gas–solid reaction systems under H₂/steam atmosphere.

中文翻译：

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氢气和蒸汽注入串联μ反应器GC / FID系统：使用Ni / Y沸石从双酚A和烷基酚中回收苯酚

新开发了可注入氢气和蒸汽的串联μ反应器-气相色谱/火焰离子化检测器（TR-GC / FID）系统，称为H ₂ / steam-TR-GC / FID，用于定量评估热解过程中的苯酚回收率双酚A（BPA），异丙基苯酚（iPrP）和异丙烯基苯酚（IPP）。选择负载Ni的Y沸石（Ni / Y），以同时催化BPA分解成苯酚和IPP，IPP氢化成iPrP，以及iPrP脱烷基化成苯酚和丙烯。这些底物在第一个μ反应器中蒸发，然后在H ₂下使用Ni / Y沸石转化为苯酚/蒸汽在第二个μ反应器中流动。将产物直接引入GC / FID，并使用萘作为内标进行定量。尽管注入蒸汽会导致产品峰变差，但通过使用两步式冰阱和低温阱可以克服这一缺点。当三种底物在350°C时单独热解时，苯酚的收率可以忽略不计，但是通过H ₂，蒸汽和Ni / Y的组合大大提高了苯酚的收率，从iPrP达到最大值89％，46％和62％ ，IPP和BPA。因此，这些结果表明从具有BPA宏观骨架的聚合物废物的热解中获得富酚产品的可能性。此外，发达的高通量分析技术可以加速H ₂下其他气固反应系统的开发。/蒸汽气氛。