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6
Sulfated Inorganic
Oxides for Methyl
Esters Production
Traditional and Ultrasound-
Assisted Techniques
Daria C. Boffito, Carlo Pirola, Claudia L. Bianchi,
Giuseppina Cerrato, Sara Morandi, and
Muthupandian Ashokkumar
6.1 INTRODUCTION
Biodiesel is a liquid biofuel that is dened as a fatty acid methyl ester matching cer-
tain standards. The two most common standards setting the characteristic of biodie-
sel are EN 14214 (European Commission) and ASTM 6751 (American Society for
Testing and Materials).
CONTENTS
6.1 Introduction .................................................................................................. 137
6.2 Materials and Metho ...