Abstract Oil sludge is a waste from the oil industry with a complex composition and its treatment is still a challenge. In addition, polyolefin waste is becoming a problem due to its accumulation and slow degradation. In this study, catalytic co-pyrolysis was used to treat oil sludge and high density polyethylene (HDPE) at 450 °C and at an atmospheric pressure for 15 min to generate paraffin-rich oily products. Y zeolites were obtained by dealumination and desilication processes which were characterized by XRD, N2 adsorption, FTIR, 29Si and 27Al NMR, TG and NH3 TPD. Pristine and modified zeolites were evaluated in the co-pyrolysis in order to assess their performances through the quality of the obtained pyrolytic oil (GC–MS and SimDis). The modificated zeolites presented higher mesoporosity than the original solid as so lower total acidity. Amidst the tested catalysts, Mod-Si-10 and Mod-Al presented the best performances showing high yield of liquid fraction, rich in parafinic light hydrocarbons, probably due to their moderate acidity and improved mesoporosity. Consequently, these two zeolites presented outstanding catalytic characteristics alongside high selectivity to paraffinic hydrocarbons in the diesel fraction from co-pyrolisis of the oil sludge waste with HDPE.

中文翻译：

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脱铝脱硅制备的HUSY沸石催化油泥与HDPE共热解石蜡产物

摘要 油泥是石油工业产生的一种废物，其成分复杂，其处理仍是一个挑战。此外，聚烯烃废物由于其积累和缓慢降解而成为一个问题。在这项研究中，催化共热解用于在 450 °C 和大气压下处理油泥和高密度聚乙烯 (HDPE) 15 分钟，以生成富含石蜡的油性产品。Y型沸石是通过脱铝和脱硅工艺获得的，通过XRD、N2吸附、FTIR、29Si和27Al NMR、TG和NH3 TPD表征。在共热解中评估原始沸石和改性沸石，以通过获得的热解油（GC-MS 和 SimDis）的质量来评估它们的性能。改性沸石的介孔率高于原始固体，因此总酸度较低。在测试的催化剂中，Mod-Si-10 和 Mod-Al 表现出最好的性能，显示出液体馏分的高产率，富含链烷烃轻烃，这可能是由于它们的中等酸性和改善的介孔性。因此，这两种沸石具有出色的催化特性，同时对来自油泥废物与 HDPE 共热解的柴油馏分中的链烷烃具有高选择性。