FTIR On-line Monitoring of Biodiesel Transesterification

Abstract

An on-line biodiesel transesterification monitoring system was developed using a mid-FTIR (Fourier Transform Infrared) spectrometer equipped with a temperature controlled transmission flow cell. A variety of spectral regions were assessed to monitor functional group changes during the transesterification process of Canola oil. The resulting dynamic reaction curves generated were used to gauge reaction progress as well as the final product parameters and compared to its corresponding GC profile. The transesterification process assessed oil: methanol molar ratios ranging from 1:6 to 1:12 (mol/mol) and catalyst concentrations ranging from 0.33% to 1.67% ml/g. Both Beer's law and Partial Least Squares calibration models were developed to quantify the components of interest. On-line FTIR analysis was found to be workable, simple and an improvement over methods such as TLC or GC to monitor the transesterification reaction, providing reaction data in real time. Being able to obtain detailed dynamic information about the process as the reaction takes place provides for more control, the ability to adjust the process if required and allows for optimization to improve product yield and consistency.

Spectroscopic Analysis of Heterogeneous Biocatalysts for Biodiesel Production from Expired Sunflower Cooking Oil

“…The main characteristic peak for biodiesel occurs at 1245 cm −1 (C-O) and corresponds to the proportion of fatty acid methyl esters [30]. Other peaks diagnostic for biodiesel were identified at positions 1742 cm −1 (C=O) and 1057 cm −1 (C-O) similar to those identified in other studies [5,31]. The spectrum for regular diesel showed some similarities to that of biodiesel, particularly in the 3000-2700 cm −1 region (Figure 8).…”

Synthesis and Thermomechanical Properties of Polyurethanes and Biocomposites Derived from Macauba Oil and Coconut Husk Fibers

“…, respectively), and C=O stretch deformation at approximately 1746 cm −1 [28][29][30]. On the FTIR spectrum of BIMO, the product of the transesterification of MO with methanol, a change on the profile of the peaks in the 1000-1400 cm −1 range can be observed, along with the appearance of a typical ester band at 1035 cm −1 (Figure 1) [31,32]. These differences between the FTIR spectra of MO and BIMO suggest that the methanolysis reaction was successful.…”

Sintesis Biodiesel Menggunakan Katalis Campuran Calcium Hydroxide dan Calcite

“…Grup fungsional CH3 dan ikatan O-CH3 memiliki respon FTIR yang khas pada rentang bilangan gelombang mid-infra merah (4000-400 cm -1 ). Secara khusus, karakteristik FAME dapat terlihat secara menonjol berbeda dari yang lain pada rentang bilangan gelombang 1600-900 cm -1 [13,14] . Setelah dikarakteriasi pada rentang bilangan gelombang tersebut, diperoleh hasilnya seperti ditunjukkan pada Gambar 6B sampai 6E.…”

“…[13] dan Yuan dkk. [14] telah menginvestigasi karakteristik FTIR FAME dan trigliserida pada rentang bilangan gelombang 1600-900 cm -1 dan mengidentifikasi lembahlembah transmitans yang dihasilkan. Mereka melaporkan bahwa lembah-lembah transmitans terjadi pada bilangan gelombang 1445 cm -1 yang disebabkan oleh serapan energi inframerah yang dilakukan oleh grup fungsional CH3 dari molekul FAME.…”