Analysis of Biodiesel Blends by FTIR

Introduction

Biodiesel refers to a diesel-equivalent processed fuel derived from biological sources such as vegetable oils and animals fats. It is also referred to as fatty acid methyl esters (FAME) made from transesterification of vegetable oils or animals fats. Biodiesel contains no petroleum but it can be blended at any level with petroleum diesel to create a biodiesel blend. When biodiesel is blended with petroleum diesel, it produces a fuel that is compatible with diesel engines. Pure biodiesel has high lubricity, high cetane, and a high flash point. "Low blend" can be defined as blends of 5% biodiesel and below. Low blends of biodiesel are also highly effective at enhancing the lubricity of diesel fuel. The typical blend used for lubricity enhancement is 2% biodiesel mixed with 98% diesel (B2). Fourier transform infrared spectroscopy (FTIR) with suitable accessories can be used effectively to provide quick and non-destructive measurement of FAME in biodiesel blends even for low percentage of blends.

October 30, 2025 GMT