Optimization of novel Lepidium perfoliatum Linn. Biodiesel using zirconium-modified montmorillonite clay catalyst

ABSTRACT This work reports the potential of novel non-edible seed oil of Lepidium perfoliatum Linn. (LSO) for accessing its potential to synthesize biodiesel using zirconium-modified montmorillonite clay catalyst. The newly synthesized zirconium-modified clay catalyst (ZrO-Mmt) was characterized using by X-ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray Spectroscopy (EDX), and Fourier transfer Infrared spectroscopy (FT-IR) spectroscopy. Response surface methodology (RSM) was used to optimize the Lepidium biodiesel (LBD) yield. Maximum biodiesel yield (88%) achieved under optimized reaction conditions were 1:15 oil: methanol, 3.5% catalyst amount at135°C for 4h respectively. Different techniques like FTIR, GC/MS, 1H-NMR, and 13C-NMR were used for characterizing LBD. Additionally, major fuel properties of LBD for instance kinematic viscosity (4.10 mm2/s), density (0.8212kg/L), cloud point (−8 °C), flash point (74°C), and pour point (−9°C) agree well with the international biodiesel standards. Overall, Lepidium perfoliatum Linn. seed oil and ZrO-Mmt clay catalysts appear to be cheap, stable, and highly active contenders for the biodiesel industry.

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