The thermal and catalytic pyrolysis of pine needles over HBeta catalysts with different SiO 2 /Al 2 O 3 ratios (25 and 300) were investigated by thermogravimetric analysis (TGA) and pyrolyzer-gas chromatography/mass spectrometry. TGA showed that the main decomposition of pine needles occurred between 150 and 550 °C. The catalytic DTG curves revealed the same decomposition temperature region as the non-catalytic TG curve of pine needles. Pyrolyzergas chromatography/mass spectrometry suggested that the effective catalytic conversion of pyrolyzate intermediates and other hydrocarbons to aromatic hydrocarbons can be achieved using HBeta catalysts at 600 °C. HBeta(25) produced a larger amount of aromatic hydrocarbons than HBeta(300) because of its higher acid amounts. By increasing the reaction temperature from 500 to 700 °C, the formation of benzene, toluene, ethylbenzene, xylenes (BTEXs) and other polycyclic aromatic hydrocarbons was increased with a concomitant decrease in phenolics and other oxygenates. The formation efficiency of BTEXs was increased further by increasing the catalyst loading.

中文翻译：

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通过 HBeta 催化快速热解从松针生产生物燃料

通过热重分析 (TGA) 和热解器-气相色谱/质谱法研究了松针在具有不同 SiO 2 /Al 2 O 3 比率（25 和 300）的 HBeta 催化剂上的热解和催化热解。TGA 表明松针的主要分解发生在 150 至 550 °C 之间。催化 DTG 曲线显示与松针的非催化 TG 曲线相同的分解温度区域。热解器气相色谱/质谱法表明，在 600 °C 下使用 HBeta 催化剂可以实现热解产物中间体和其他烃向芳烃的有效催化转化。HBeta(25) 比 HBeta(300) 产生更多的芳烃，因为它的酸量更高。通过将反应温度从 500°C 提高到 700°C，苯的形成，甲苯、乙苯、二甲苯 (BTEX) 和其他多环芳烃增加，同时酚类和其他含氧化合物减少。通过增加催化剂负载量，BTEXs 的形成效率进一步提高。