The main challenge to the wider use of biodiesel as a transport fuel has been its high cost of production. Studies have been performed to obtain the cheapest methods for biodiesel production. The calcium oxide catalyzed transesterification reaction has shown better performance for fuel‐grade biodiesel from cheaper feedstock. In this study, a calcium oxide catalyzed biodiesel production process is designed in four different scenarios based on different possible arrangements of the downstream processes.
The process flow diagrams of the different scenarios were designed using Aspen Plus and Super Pro software. These process simulations were used to evaluate the techno‐economic performance of the process scenarios. Technical performance was been evaluated based on the quantity and quality of the biodiesel and glycerol produced, the amount of biodiesel produced per amount of feedstock consumed, and the amount of other valuable byproducts. Similarly, the economic performance of the process scenarios has also been assessed using parameters such as total investment cost, unit production cost, net present value, internal rate of return, payback time, and return on investment.
Each of these four scenarios was divided into two production capacity levels to investigate the effect of change in production capacity on the economic feasibility of the process scenarios.
The scenario with consecutive centrifugations for glycerol and soap separation, and distillation for biodiesel purification, evidenced poor technical performance, whereas the double reactor scenario provided more, and better quality, product, and the economic feasibility of this scenario was good when the oil supply rate was above 4600 kg h−1. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd