Thermal decomposition of n-hexane in organic Rankine cycle: a study combined ReaxFF reactive molecular dynamic and density functional theory

Frontiers in Energy Research

Energy Research

Fei Yan¹  Jun Chen²  Wei Liu²  Aijing Shen²  Nan Wang² 

[1]School of Graduate, Chongqing University, Chongqing, China

[2]State Power Investment Corporation Research Institute (SPICRI), Beijing, China

关键词: n-hexane;    thermal decomposition;    organic Rankine cycle;    ReaxFF reactive molecular dynamic;    density functional theory;   

DOI  :  10.3389/fenrg.2023.1276626

 received in 2023-08-12, accepted in 2023-09-13,  发布年份 2023

来源: Frontiers

【 摘 要 】

The thermal decomposition mechanism of n-hexane is investigated by using density functional theory and ReaxFF force field. The initial decomposition reactions, the effect of temperature on thermal decomposition and first-order kinetics are analyzed. The results show that the C-C bonds in n-hexane molecule are more easily decomposed than that of C-H bonds, and the breakage of C3-C4 bond is the main initial decomposition reaction. The main decomposition products of n-hexane are H2, CH4, C2H2, C2H4, C2H6, and C3H6. The decomposition rate of n-hexane is accelerated by temperature. The apparent activation energy and pre-exponential factor of n-hexane thermal decomposition are 209.8 kJ mol−1 and 1.1 × 1013 s−1, respectively.

【 授权许可】

Unknown   
Copyright © 2023 Liu, Wang, Chen, Shen and Yan.