Enhancing biodiesel production efficiency with industrial waste-derived catalysts: techno-economic analysis of microwave and ultrasonic transesterification methods

Abdallah S. Elgharbawy*, Ahmed I. Osman*, Abdel Ghaffar M. El Demerdash, Wagih A. Sadik, Mosaad A. Kasaby, Shimaa E. Ali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
25 Downloads (Pure)

Abstract

Biodiesel is a low-emission, environmentally friendly, and renewable alternative to diesel fuel. Conventional transesterification, the most common method for biodiesel production, has several drawbacks, including high temperature, high reactant consumption, and extended reaction times. Homogeneous alkaline catalysts, frequently used in biodiesel synthesis, present issues such as high cost, limited recyclability, and efficiency concerns. Herein, we technically and economically evaluate new transesterification approaches, such as ultrasonic and microwave methods, utilizing a recyclable heterogeneous catalyst derived from industrial waste. Our findings indicate that the biodiesel produced meets high technical specifications and demonstrates the high efficiency of the low-cost heterogeneous catalyst in the new transesterification methods. The yield quantity for the three methods, microwave, ultrasonic, and conventional, was 97.4%, 96.9%, and 96.6%, respectively, and the produced biodiesel standards had excellent quality and meet international standards (ASTM-6751). The microwave and ultrasonic methods reduced reaction time by 99.5 and 83.3%, respectively, as well as the amount of methanol by 50% and the amount of catalyst by 50 and 75%, respectively, proving the high positive impact of new techniques on biodiesel production. Financial indicators such as net income, return on investment, net present value (NPV), and profitability index showed higher values for microwave and ultrasonic methods compared to conventional transesterification, highlighting the significant profitability of these methods.

Original languageEnglish
Article number118945
Number of pages14
JournalEnergy Conversion and Management
Volume321
Early online date16 Sept 2024
DOIs
Publication statusPublished - 01 Dec 2024

Keywords

  • biodiesel
  • cost analysis
  • microwave
  • transesterification
  • ultrasonic
  • waste oil

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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