Effect of Weak Acids as a Catalyst on the Transesterification of Soybean Oil …

To obtain a high biodiesel yield, the conditions of transesterification of vegetable oil with supercritical methanol are harsh. The reaction temperature is required between 350 and 400 °C, and the reaction pressure is required above 20 MPa. To reduce the operating temperature and pressure, many researchers adopted various methods, such as the selection of a new reactor, the addition of a co…