Oxidation characteristic and products of ETBE (ethyl tert-butyl ether). (15th March 2015)

• Record Type: Journal Article
• Authors: Liu, Xiongmin; Ito, Shunsuke; Wada, Yuji
• Is Part Of: Energy. Volume 82(2015)
• Page Start: 184
• Page End: 192
• Publication Date: 2015-03-15
• Subjects: ETBE (Ethyl tert-butyl ether) -- Oxidation -- Characteristic -- Thermal decomposition -- Oxidation products -- ARC (Accelerating rate calorimeter); Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2015.01.026
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The oxidation characteristic of ETBE (ethyl tert -butyl ether) was determined using ARC (accelerating rate calorimetry). Oxidation temperature and oxidation kinetics were calculated using temperature-time (T-t) and pressure-time (P-t) plots, and reaction products were analyzed by GC-MS (gas chromatography-mass spectrum). Results showed that the oxidation reaction process of ETBE with oxygen occurred through absorption of oxygen by ETBE, followed by thermal decomposition and oxidation reaction. The initial auto-oxidation temperature was approximately 383 K. The initial oxygen absorption kinetics was second-order, 1/P = 1.39 × 10 −7 t + 7.31 × 10 −4 . The thermal decomposition kinetics of ETBE peroxides was first-order reaction, and parameters were k = Ar × exp (Ea /RT), ln (Ar ) = 85.43 (1/min), Ea = 264.9 kJ/mol. Ea was reduced when the reaction included added peroxide. Oxidation reaction products were complex, indicating a link between the products and the ETBE/O2 ratio. Many oxidation products were formed when an excess of oxygen, such as carbon dioxide, formaldehyde, formic acid, or acetic acid was present. And the acetic acid tert-butyl ester and formic acid 1, 1-dimethylethyl ester were detected in reaction product. ETBE was stable even 393 K, and exothermic reaction has not been detected even 523 K under a nitrogen atmosphere. Highlights: Oxidation characteristic and products of ETBE were studied using an ARC. Two reaction stages of ETBE with oxygen were found. Oxygen absorption kinetics and thermal decomposition kinetics to be calculated. Hazardous of ETBE oxidation reaction was evaluated. The reaction products were analyzed for the ratio of ETBE/O2 .