Sani J, Sokoto A M, Tambuwal A D, Garba N A
Sokoto Energy Research Center, Usmanu Danfodiyo University, Sokoto, Nigeria.
Department of Pure and Applied Chemistry, Usmanu Danfodiyo University, Sokoto, Nigeria.
Heliyon. 2017 May 29;3(5):e00304. doi: 10.1016/j.heliyon.2017.e00304. eCollection 2017 May.
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 mgI/100 g respectively. Thermo-chemical conversion of the oil using NiO/SiO 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, H pressure of 15 bars, and catalyst to oil ratio of 0.25 g/100 cm 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 mm/s), density (0.94 g/ml), saponification value (185.1 ± 3.96 mgKOH/g), and iodine value (20.57 ± 0.20 I/100 g) respectively. These results show that the NiO/SiO could be a suitable catalyst for conversion of waste vegetable oil to hydrocarbons.
有机废物产生量的增加、全球石油储备的减少，以及废油处理和化石燃料燃烧所带来的环境挑战，使得人们需要寻找替代能源。采用美国材料与试验协会（ASTM）D - 975方法，对从炸鱼店获取的废食用油的理化性质进行了分析。该油的酸值和碘值分别为30.43 ± 0.32 mgKOH/g和57.08 ± 0.43 mgI/100 g。在3小时的停留时间内，在不同反应条件（压力、温度和催化剂浓度）下，使用NiO/SiO对该油进行热化学转化，得到了33.63%的碳氢化合物。在400℃、15巴的氢气压力以及0.25 g/100 cm的催化剂与油的比例条件下，对废食用油进行加氢催化热解，得到了最高的碳氢化合物产率（41.98%）。产物的燃料特性分别为：十六烷值（71.16）、高热值（41.43 MJ/kg）、运动粘度（2.01 mm/s）、密度（0.94 g/ml）、皂化值（185.1 ± 3.96 mgKOH/g）和碘值（20.57 ± 0.20 I/100 g）。这些结果表明，NiO/SiO可能是一种将废植物油转化为碳氢化合物的合适催化剂。
