Nghiên cứu tổng hợp biodiesel từ nguyên liệu dầu vi tảo bằng quá trình hai giai đoạn sử dụng hệ xúc tác axit-bazơ rắn

Abstract

This report covered a two-stage biodiesel synthesis process by using acid-base catalysts consisting of SO₄^2-/ZrO₂ and Ca(NO₃)₂/SiO₂. A micro-algal oil typed Botryococcus having a very high content of free fatty acids (FFAs) was used as feedstock. In the first stage, a major amount of FFAs was converted to fatty acid methyl esters (FAMEs) on the solid acid catalyst SO₄^2-/ZrO₂. The product of this process including FAMEs and triglycerides became the feedstock for the second stage reactions; in which they was completely transesterified to FAMEs on a solid base catalyst Ca(NO₃)₂/SiO₂. The conditions for the reactions were investigated to reach the optimum parameters for whole biodiesel synthesis.

Keywords: Biodiesel, calcium nitrate, zirconia, microalgae oil, Botryococcus.