Potassium hydroxide/porous carbon heterogeneous catalysts for biodiesel production, and their reusability

Name: Apiwat Dankeaw

Organization : Rajamangala University of Technology Isan (RMUTI). Faculty of Industry and Technology

Email : apiwat.dn@rmuti.ac.th

Name: Kanchana Sotho

Organization : Rajamangala University of Technology Isan (RMUTI). Faculty of Industry and Technology

LCSH: Biodiesel fuels

LCSH: Palm oil

LCSH: Methanol

LCSH: Transesterification

LCSH: Heterogeneous catalysis

Abstract: This study explores the synthesis of biodiesel from palm oil and methanol using a heterogeneous carbon-based solid catalyst via transesterification. Potassium hydroxide was used as a basic catalyst, impregnated onto porous carbons derived from rubber wood through air-limited pyrolysis. The wet impregnation process was carried out followed by thermal treatment. The prepared catalyst was employed in the transesterification process conducted at a temperature of 60°C for a duration of 2 h. The feasibility of recycling the catalyst in order to address environmental concerns, such as the reduction of wastewater generated from the reactions containing alkaline contaminants originating from the cleaning processes of biodiesel product post-reaction, was principally focused. The heterogeneous catalyst achieved a biodiesel yield of approximately 84%, surpassing typical yields from conventional homogeneous catalysts. It demonstrated reusability, with less than a 35% yield reduction after three cycles, while maintaining biodiesel quality in line with standard specifications. This approach offers an efficient, low-cost synthesis method using agricultural waste as a catalyst support material. Additionally, the catalyst management process is simple and practical, making it suitable for real-world applications beyond laboratory settings. These results highlight the potential for sustainable biodiesel production with minimal environmental impact through catalyst recycling and waste utilization

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2568

Modified: 2025-10-24

Issued: 2025-10-24

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BibliograpyCitation : In The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana and Suranaree University of Technology. Institute of Science. School of Chemistry. Pure and Applied Chemistry International Conference 2025 (PACCON 2025) (pp.231-236). Bangkok : The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana in association with the School of Chemistry, Institute of Science, Suranaree University of Technology, 2025

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