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Open access Aug 2026

The Low-Cost Dolomite Catalyst for Sustainable Biodiesel Production from Kapok Seed Oil

This study investigated dolomite as a low-cost heterogeneous catalyst for microwave-assisted biodiesel production from kapok seed oil (KSO). Dolomite was thermally activated at 900 °C for 4 h to convert carbonate phases into catalytically active CaO–MgO oxides. Catalyst characterization using XRD, nitrogen adsorption–d...

S. Pratidina, Arif Hidayat · 0 citations
Open access Sep 2026

Valorization of Biogenic Calcium-Rich Wastes as a Composite CaO Catalyst for Optimized Palm Kernel Oil Biodiesel Synthesis

Biodiesel is a sustainable alternative to petroleum diesel, but developing efficient, low-cost, and environmentally friendly heterogeneous catalysts remains challenging. This study investigated biodiesel production from crude palm kernel oil using a composite calcium oxide catalyst derived from waste eggshells and snai...

W. Raji, A. Solola, A. Popoola et al. · 0 citations
Open access Oct 2026

Optimization of Biodiesel Production from Waste Cooking Oil over a Magnetic Fe–Zr Nanocatalyst

The increasing demand for sustainable and low-cost biodiesel production has driven interest in waste cooking oil (WCO) as an alternative feedstock. In this study, a mesoporous magnetic Fe–Zr nanocatalyst with a specific surface area of 203.12 m²/g was synthesized via co-precipitation followed by incipient wetness impre...

Balqis Adlina Omar, N. A. Abd Rahman, F. W. Harun et al. · 0 citations
Open access Sep 2026

Sustainable Biodiesel Production over a Novel Magnetic Solid Acid Catalyst Derived from Copper Ferrite: Statistical Optimization and Catalytic Performance Evaluation

In this study, a novel magnetic solid acid catalyst based on molybdenum oxide-impregnated copper ferrite was synthesized and applied to methyl transesterification from waste cooking oil (WCO). The catalytic solid was characterized by surface acidity, XRD, FTIR, SEM, EDS, and VSM techniques. A 24 face-centered central c...

Gustavo Ferreira Leal, M. A. Gonçalves, Hiarla Cristina Lima Dos Santos et al. · 0 citations
Open access Sep 2026

Scale Deposits from Drinking-Water Pipelines as a Sustainable Heterogeneous Catalyst for Biodiesel Production

Biodiesel has attracted considerable attention as a promising renewable fuel because it burns cleaner than conventional diesel and produces lower pollutant emissions. In this work, a CaO-based heterogeneous catalyst was prepared by calcining drinking water pipeline scale deposits at 900 °C for 2 h. X-ray diffraction (X...

K. Kara, Siham Bouzekri, Mohammed Zine et al. · 0 citations
Oct 2026

Hierarchical porous carbon catalyst derived from sodium lignosulfonate for efficient biodiesel production: high turnover frequency and economic viability.

Sodium lignosulfonate, a major byproduct of the sulfite pulping industry, can be converted into carbonaceous materials for catalyst preparation, enabling high‑value utilization of industrial waste. In this study, a hierarchical porous carbon support (HPC) was prepared from sodium lignosulfonate and sodium humate throug...

Shan-Shan Li, Yi-Fan Li, Li-Hong Guo et al. · 0 citations

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