Energy absorption and reaction mechanism for thermal pyrolysis of n-decane under supercritical pressure. (5th February 2017)

• Record Type: Journal Article
• Authors: Zhou, H.; Gao, X.K.; Liu, P.H.; Zhu, Q.; Wang, J.L.; Li, X.Y.
• Is Part Of: Applied thermal engineering. Volume 112(2017:Feb.)
• Page Start: 403
• Page End: 412
• Publication Date: 2017-02-05
• Subjects: n-Decane -- Mild thermal cracking -- Global reaction model -- Residence time calculation -- Chemical heat sink; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.10.057
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: A developed experimental method was used to investigate the cracking of n -decane. A one-step global reaction model was established for mild-cracking n -decane. A density measuring method was developed to improve the precision of residence time. The chemical heat sink of mild thermal cracking n -decane was evaluated. Abstract: In this work, the behavior of mild thermal cracking n -decane was investigated experimentally and numerically. A developed experimental method of electrical heating tube was used to analyze the thermal cracking of n -decane under various temperatures and pressures. The results showed that, at low cracking conversion of 12%, the selectivities of all cracked products are approximately equal to constant values. A one-step global reaction model consisting of 11 species was established for mild-cracking n -decane and a novel on-line density measurement method was developed to improve the precision of residence time calculation, thus the kinetics parameters. The reliability of the reaction model was confirmed through comparing the experimental results with simulated values by using Chemkin program with the deviation less than 10%. The chemical heat sink of thermal cracking n -decane was evaluated and the result showed that the heat absorption provided by chemical endothermic reactions is unnegligible even at low conversion.