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Biodiesel is a promising alternative fuel. In this study, production of biodiesel from cooking oil (CO) was carried out via transesterification method. Heterogeneous catalyst, calcium oxide-titanium dioxide (CaO-TiO2) was selected as the best catalyst. The effects of CaO-TiO2 catalyst on catalyst amount and calcination temperature of catalyst towards the percentage conversion of oil to biodiesel were investigated. The catalysts were analyzed using Brunauer, Emmett and Teller (BET) test method. The results obtained showed that 76.67 % of oil was successfully converted into biodiesel using 800°C calcined CaO-TiO2 catalyst. This indicates that the CaO-TiO2 has potential as a future heterogeneous catalyst for biodiesel production. Catalyst dosage of 0.5 w/w% with molar ratio oil to methanol is 3:5, stirring speed of 250 rpm and temperature of 65°C in 1 hour reaction time are the best condition for the conversion of oil to biodiesel. It was found out that, calcination temperature of catalyst and catalyst amount gave significant effect on the conversion of oil.

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In this study, production of biodiesel from waste cooking oil (WCO) was carried out via ultrasonic-assisted transesterification method. Calcium oxide (CaO) was used as a catalyst. The effects of methanol to oil molar ratio, reaction temperature and the catalyst amount towards the percentage conversion of oil to biodiesel were investigated. The biodiesel produced was analyzed using GC-FID method. The results obtained showed that 82 % of oil was successfully converted into biodiesel. This indicates that the used oil (WCO) has the potential to be the future source of biodiesel. Catalyst concentration of 3 w/w%, methanol to oil molar ratio of 15:1 and temperature of 65°C are the best condition for the conversion of oil to biodiesel. The result obtained was found out that, methanol to oil molar ratio and catalyst amount has given significant effect on the conversion of oil. However, temperature ranged from (35 to 75) °C apparently, showed no significant effect on percentage conversion of oil.

Transesterification method was carried out in biodiesel production from cooking oil (CO). Calcium oxide (CaO) was selected as the best catalyst. This study investigated the effects of percentage conversion of oil to biodiesel from methanol to oil molar ratio and catalyst amount. Brunauer, Emmett and Teller (BET) test method was used to analyze the surface area. The results obtained showed that using 200°C calcined CaO catalyst, 76.67 % biodiesel was successfully converted from oil. This indicates that the cooking oil (CO) has potential to become a future source of biodiesel. 0.5 w/w% catalyst dosages, 3:5 oil to methanol molar ratio and 65°C reaction temperature are the best condition for the biodiesel conversion from oil. This study also shows that conversion of cooking oil is significantly affected by methanol to oil molar ratio and catalyst amount.