The thermal stability and safety of 2, 5-dimethylfuran (DMF) oxidation

DMF is renewable energy obtained from glucose, its thermal stability and safety need to be investigated. Accelerated rate calorimeter (ARC) is widely used to evaluate the risk of hazardous materials. In this paper, the thermal stability and safety of DMF oxidation were investigated using an ARC. DMF does not react even when the temperature reaches 452 K under nitrogen atmosphere. In oxygen atmosphere, the onset temperature (T-0) of DMF oxidation is 323.49 K, and the activation energy (E-a) is 172.35 kJ/mol. The peroxide concentration of oxidation process was determined by iodometry, and the oxidation products were analyzed by gas chromatography - mass spectrometry. The pressure and exothermic behavior of ARC are related to the reaction mechanism. A simple three steps mechanism of DMF oxidation was described: fist DME reacts with oxygen to form peroxide; second is the main oxidation stage, oxidation products are complex; the third step is thermal decomposition.

Automated summary

This paper investigated the thermal stability and safety of DMF oxidation using an Accelerated Rate Calorimeter (ARC). The results showed that DMF does not react under a nitrogen atmosphere, but undergoes oxidation in an oxygen atmosphere with an onset temperature of 323.49 K and an activation energy of 172.35 kJ/mol. The oxidation products were analyzed by gas chromatography - mass spectrometry, and a simple three-step mechanism of DMF oxidation was proposed.