a mini-review on biodiesel production using zeolite-based catalysts

With increasing environmental concerns and the depletion of fossil fuels, biodiesel has emerged as a crucial renewable energy alternative. among various production methods, zeolite-based solid catalysts have gained significant attention due to their high surface area, thermal stability, and reusability. unlike traditional liquid alkaline catalysts, zeolites reduce soap formation, corrosion, and purification requirements, making them more efficient and environmentally friendly. however, challenges such as mass transfer limitations in micropores, sensitivity to feedstock impurities, and stability under harsh reaction conditions remain obstacles to their widespread adoption. this mini-review explores recent advancements in acidic, bi-functional, and basic zeolite catalysts for biodiesel production via esterification and transesterification. strategies to overcome existing limitations, such as hierarchical pore design, surface modification, and composite formation, are discussed. future research directions focus on nanostructure engineering and multifunctional composites to improve catalytic performance, durability, and cost-effectiveness. despite current technical hurdles, zeolites demonstrate strong potential for sustainable biodiesel production. continued innovation in catalyst design and process optimization could further enhance their efficiency, making them a viable solution for cleaner energy generation. the findings emphasize the importance of zeolite catalysts in advancing renewable fuel technologies while addressing environmental and economic concerns.