This paper reports the investigation of zeolite NaY synthesized from kaolin, a locally abundant soil material found in the Benin City metropolis, Nigeria, as a suitable catalyst and its effect on the properties of pyrolytic oil produced from used tires. The pyrolysis process was conducted from a range of 1 to 10 wt.% of catalyst concentration to the used tire at an operating temperature of 600°C, heating rate of 15°C/min, and particle size of 6 mm. An increase in the catalyst weight gave a maximum yield of catalytic pyrolytic oil (CPO) of 21.3 wt.% at a catalyst-to-tire ratio of 7.5 wt.%. Although this was lower than the noncatalyzed pyrolytic oil yield (34.40 wt.%), the quality in terms of chemical composition and hydrocarbon fuel range varied from that of the noncatalyzed pyrolytic oil, as indicated by the FT-IR, NMR, and GC-MS analyses. From the GC-MS result, the CPO gave a benzene yield higher than that of noncatalyzed pyrolytic oil. The CPO benzene yield can be ranked as CPO (5 wt.%) > CPO (1 wt.%) > CPO (10 wt.%) > CPO (7.5 wt.%) > noncatalyzed pyrolytic oil. The catalyst also improved the yield of other valuable chemicals such as ethylbenzene, o- and p-xylene, styrene, toluene, quinoline, pyrene, thiophene, P-cresol, phenol, and limonene in the pyrolytic oil. For hydrocarbon range, the catalyst displayed the potential to increase the yield of carbon range (C6–C15), which is similar to gasoline (C6–C12) and kerosene (C11–C14), with a lower yield of diesel and fuel oils (C11–C20) when compared to the noncatalyzed pyrolytic oil.

中文翻译：

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利用合成沸石改善废轮胎衍生的热解油的性能

本文报道了由高岭土合成的NaY沸石的研究，这种高岭土是一种适合的催化剂，它在尼日利亚贝宁市大都会中发现，是一种局部丰富的土壤物质，它对废旧轮胎产生的热解油性能产生影响。在600℃的工作温度，15℃/ min的加热速率和6mm的粒径下，对催化剂的使用温度为催化剂浓度的1-10重量％。催化剂重量的增加在催化剂与轮胎的比率为7.5重量％的情况下给出了21.3重量％的催化热解油（CPO）的最大产率。尽管这比未催化的热解油的收率要低（34.40 wt。％），但如FT-IR，NMR和GC- MS分析。根据GC-MS结果，CPO的苯收率高于未催化的热解油。CPO苯的收率可分级为CPO（5重量％）＞ CPO（1重量％）＞ CPO（10重量％）＞ CPO（7.5重量％）＞未催化的热解油。该催化剂还提高了其他有价值的化学品（例如乙苯，ø -和p二甲苯，苯乙烯，甲苯，喹啉，芘，噻吩，对甲酚，苯酚，苎烯和在所述热解油。对于碳氢化合物范围，该催化剂显示出增加碳范围（C6-C15）产量的潜力，类似于汽油（C6-C12）和煤油（C11-C14），而柴油和燃料油的产率较低（ C11–C20）与非催化热解油相比。