Biodiesel Production from Waste Cooking Oil Catalyst Selection and Optimization
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Date
2023-06-30
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UNIVERSITY OF 20 AUGUST 1955 - SKIKDA
Abstract
In the last few years, from the climate change crisis to the Ukrainian–Russia conflict, the shortage of supply chains has led to severe energy shortages in many countries, all of which have opened up orientation and reliance on renewable energy sources, including biofuels. However, we need to improve its productivity and reduce its cost because these are the obstacles facing the biofuels industry. Therefore, we want to develop and improve the catalyst used because it has the greatest impact on productivity and cost.
By trying different potential catalysts, each one of theme was synthesized using a different method, such as a mixture of KOH and NaOH as a homogeneous catalyst to using aluminum oxide as catalyst and finally making a heterogeneous catalyst by impregnation of KOH and NaOH in alumina and comparing it with the most used catalyst to produce biodiesel which is, NaOH; the comparison was based on the yield production under the same conditions (temperature, reaction time, molar ratio, and mass ratio ) and the same WCO to ensure that we obtained the most accurate result.
In this study, we found that the highest yield production (93.1 %) was achieved with NaOH/alumina, and the NaOH yield was 89.9%, then studied the effects that control biodiesel production for NaOH/alumina, such as temperature, reaction time, MeOH: WCO molar ratio, and catalyst mass ratio, then we manager to optimize it to 94.4%.
In conclusion, we optimized the biodiesel catalyst to produce a higher yield and, at the same time, reuse it multiple times because of the nature of the heterogeneous catalyst, which helps reduce the cost of the catalyst.