Effect of NiO/SiO2 on thermo-chemical conversion of waste cooking oil to hydrocarbons

Abstract

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.

Production and Characterization of Heterogeneous Catalyst (CaO) from Snail Shell for Biodiesel Production Using Waste Cooking Oil

“…Knowledge that is known about the usual conventional fuels is nothing to write good about as they are known for polluting air by emissions of sulfur dioxides, carbon-dioxides, particulate matter and other gases which are detrimental to the environment as it contributes to global warming problems [1] Even with this, we are still charged with the responsibility of harnessing energy from other green sources because "Energy sources are the main driver of economic growth and social development of a country [2] and if we want to progress as a country, it is of paramount important that we should search for a greener alternative source of energy. Naveen [3], also noted that there is an exponential increase in the consumption of fossil fuel both in developed and developing nations; and it is estimated that these fuels shall be exhausted by the turn of 22 nd century.…”

Effect of Process Variables on the Transesterification Process of Palm Oil Sludge to Biodiesel

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Enhancing the Catalytic Performance of NiO during the Transesterification of Waste Cooking Oil Using a Diatomite Carrier and an Integrated Ni0 Metal: Response Surface Studies

“… 8 The efficiency of heterogeneous catalysts is a function of surface area, chemical stability, surface reactivity, recovering method, and the concentration of catalytic sites. 9 , 10 …”