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Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

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Esterification of acidic oils over a versatile amorphous solid catalyst.

Federica Zaccheria¹, Simona Brini, Rinaldo Psaro

¹ISTM-CNR, Milano, Italy.

|May 30, 2009

Summary

A novel amorphous silicon dioxide-zirconium dioxide catalyst efficiently esterifies free fatty acids and transesterifies triglycerides in vegetable oils. This bifunctional catalyst is ideal for low-waste oil deacidification and high-acid feedstock biodiesel production.

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Published on: December 16, 2019

Area of Science:

Catalysis
Materials Science
Green Chemistry

Background:

Vegetable oils often contain high free fatty acids (FFAs), complicating downstream processing.
Traditional methods for FFA removal or conversion can be inefficient or generate waste.
Biodiesel production from high-acid feedstocks requires effective pretreatment or integrated processes.

Purpose of the Study:

To evaluate the efficacy of an amorphous SiO(2)-ZrO(2) catalyst for simultaneous FFA esterification and triglyceride transesterification.
To assess the catalyst's potential for low-waste deacidification and one-pot biodiesel production.

Main Methods:

Synthesis of amorphous silicon dioxide-zirconium dioxide (SiO(2)-ZrO(2)) catalyst.
Testing the catalyst's activity in esterification of FFAs in vegetable oils.
Evaluating the catalyst's performance in transesterification of triglycerides.

Main Results:

The amorphous SiO(2)-ZrO(2) catalyst demonstrated high activity in esterifying FFAs.
The catalyst also effectively promoted the transesterification of triglycerides.
The bifunctional nature of the catalyst was confirmed.

Conclusions:

Amorphous SiO(2)-ZrO(2) is a promising catalyst for simultaneous FFA removal and biodiesel production.
The catalyst enables efficient, low-waste pretreatment of high-acid vegetable oils.
This catalyst supports a simplified, one-pot biodiesel production pathway.