Experimental study of the structure of a lean premixed indane/CH4/O2/Ar flame

TL;DR

This study investigates the detailed chemical structure of a lean premixed indane/CH4/O2/Ar flame, identifying numerous hydrocarbons and aromatic compounds to better understand diesel fuel combustion chemistry.

Contribution

It provides a comprehensive analysis of the species formed in a specific lean premixed flame, including aromatic and oxygenated compounds, expanding knowledge of combustion intermediates.

Findings

Identified 11 C3-C5 hydrocarbons and 3 C1-C3 oxygenated compounds.

Detected 17 aromatic products including benzene, toluene, and naphthalene.

Measured temperature range from 800 K to 2000 K in the flame.

Abstract

In order to better understand the chemistry involved during the combustion of components of diesel fuel, the structure of a laminar lean premixed methane flame doped with indane has been investigated. The gases of this flame contains 7.1% (molar) of methane, 36.8% of oxygen and 0.90% of indane corresponding to an equivalence ratio of 0.74 and a ratio C9H10/CH4 of 12.75%. The flame has been stabilized on a burner at a pressure of 6.7 kPa using argon as dilutant, with a gas velocity at the burner of 49.2 cm/s at 333 K. Quantified species included usual methane C0-C2 combustion products, but also 11 C3-C5 hydrocarbons and 3 C1-C3 oxygenated compounds, as well as 17 aromatic products, namely benzene, toluene, phenylacetylene, styrene, ethylbenzene, xylenes, trimethylbenzenes, ethyltoluenes, indene methylindane, methylindene, naphthalene, phenol, benzaldehyde, benzofuran. The temperature was measured thanks to a thermocouple in PtRh (6%)-PtRh (30%) settled inside the enclosure and ranged from 800 K close to the burner up to 2000 K in the burned gases.