Increase in organic waste generation, dwindling nature of global oil reserves coupled with environmental challenges caused by waste oil disposal and burning of fossil fuels necessitated the need for alternative energy resources. Waste cooking oil obtained from the frying fish outlet was analyzed for its physicochemical properties using ASTM D-975 methods. Acid and Iodine values of the oil were 30.43 ± 0.32 mgKOH/g and 57.08 ± 0.43 mgI2/100 g respectively. Thermo-chemical conversion of the oil using NiO/SiO2 at different reaction conditions (pressure, temperature, and catalyst concentration) at a residence time of 3 h yielded 33.63% hydrocarbons. Hydro-catalytic pyrolysis of waste cooking oil at 400 °C, H2 pressure of 15 bars, and catalyst to oil ratio of 0.25 g/100 cm3 resulted in highest hydrocarbon yield (41.98%). The fuel properties of the product were: cetane number (71.16), high heating value (41.43 MJ/kg), kinematic viscosity (2.01 mm2/s), density (0.94 g/ml), saponification value (185.1 ± 3.96 mgKOH/g), and iodine value (20.57 ± 0.20 I2/100 g) respectively. These results show that the NiO/SiO2 could be a suitable catalyst for conversion of waste vegetable oil to hydrocarbons.
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机译：有机废物产生的增加，全球石油储备的日渐减少，再加上废油处置和化石燃料燃烧造成的环境挑战，因此需要替代能源。使用ASTM D-975方法分析了从炸鱼出口获得的废食用油的理化特性。油的酸和碘值分别为30.43±0.32 mgKOH / g和57.08±0.43 mgI2 / 100 g。在不同的反应条件（压力，温度和催化剂浓度）下，使用NiO / SiO2对油进行热化学转化，其停留时间为3小时，生成了33.63％的烃。废食用油在400°C，H2压力为15巴，催化剂与油的比例为0.25 g / 100 cm 3 的条件下进行氢催化热解，得到最高的烃收率（41.98％）。产品的燃料性质为：十六烷值（71.16），高发热量（41.43 MJ / kg），运动粘度（2.01 mm 2 / s），密度（0.94 g / ml），皂化值（185.1±3.96 mgKOH / g）和碘值（20.57±0.20 I2 / 100 g）。这些结果表明，NiO / SiO2可能是将废植物油转化为烃类的合适催化剂。
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