Abstract Aromatic hydrocarbons (AHs) are extensively used as industrial raw materials. In this study, the catalytic pyrolysis of Huadian oil shale with ZSM-5 (SAR = 25, 38, 50 and 70) as catalyst was conducted to explore its potential to produce aromatic hydrocarbons. The pyrolysis experiments were performed in an aluminum retort with or without ZSM-5 addition (10 wt.%). The AHs production was evaluated through gas chromatography-mass spectrometry analysis of the derived shale oil samples. The results showed that ZSM-5 catalysis decreased shale oil yield from 9.33 wt.% to ∼6 wt.%, while the AHs content of shale oil was elevated remarkably from 2.88 % to above 20 %. Z5-25 and Z5-38 appeared to be the suitable catalysts for catalytic pyrolysis as the AHs content amount to 59.39 % and 56.46 %, respectively. Furthermore, Z5-25 catalysis produced less monocyclic aromatic hydrocarbons and more polycyclic aromatic hydrocarbons than Z5-38 catalysis did. Finally, a brief lumped reaction scheme for AHs formation from catalytic pyrolysis of oil shale was proposed. The cracking of long-chain aliphatic hydrocarbons at ZSM-5 surface followed by aromatization of small aliphatic hydrocarbons within ZSM-5 microporous channel was assumed as the main pathway for the formation of AHs from catalytic pyrolysis of oil shale.

中文翻译：

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ZSM-5沸石催化华电油页岩热解制芳烃

摘要 芳烃（AHs）被广泛用作工业原料。本研究以ZSM-5（SAR=25、38、50和70）为催化剂对华电油页岩进行催化热解，探索其生产芳烃的潜力。热解实验在铝制蒸馏器中进行，添加或不添加 ZSM-5（10 重量%）。通过对衍生的页岩油样品进行气相色谱-质谱分析来评估 AHs 的产量。结果表明，ZSM-5 催化使页岩油产率从 9.33 wt.% 降低到~6 wt.%，而页岩油的 AHs 含量从 2.88% 显着提高到 20% 以上。Z5-25 和 Z5-38 似乎是适用于催化热解的催化剂，因为 AHs 含量分别为 59.39% 和 56.46%。此外，Z5-25 催化比 Z5-38 催化产生更少的单环芳烃和更多的多环芳烃。最后，提出了油页岩催化热解生成 AHs 的简要集中反应方案。ZSM-5 表面长链脂肪烃的裂解和 ZSM-5 微孔通道内小脂肪烃的芳构化被认为是油页岩催化热解生成 AHs 的主要途径。