ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Pyrolysis and kinetic study of ethanol and DME inside a shock tube

Yong-chao Dong, Zhi-hao Ma, En-yu Lv, Xin Wang, Xin Li, and Yi-fan Jin

School of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang, People’s Republic of China

E-mail: mazhihao@haust.edu.cn

Received: 13 August 2021  Accepted: 7 September 2022

Abstract:

The pyrolysis of ethanol and dimethyl ether at 1200–1700 K and 0.20–0.25 MPa was studied inside a shock tube. A gas chromatograph was used to detect four pyrolysis products such as methane, acetylene, ethylene and formaldehyde. Based on Mittal and Kaiser mechanism, a detailed combination reduced mechanism (DME-Ethanol mechanism) was established by using directed relation graph method. Based on the reduced mechanism of DME-Ethanol, the ROP (Rate of Production) and sensitivity analysis of dimethyl ether and ethanol were carried out. The comparative analysis showed that the main products in the pyrolysis of ethanol and dimethyl ether were ethylene and methane, respectively. Ethanol and dimethyl ether are mainly consumed by hydrogen abstraction reactions initiated by H and CH₃. The unique symmetrical structure of dimethyl ether makes the consumption ratio of dimethyl ether through unimolecular decomposition reaction larger than that of ethanol.

Keywords: Shock tube; Ethanol; Dimethyl ether; Pyrolysis products; Chemical kinetics

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02481-w

Chemical Papers 77 (1) 229–239 (2023)