Autoignition of Butanol Isomers at Low to Intermediate Temperature and Elevated Pressure

TL;DR

This study investigates the autoignition delay of all butanol isomers at various temperatures and pressures, comparing experimental results with kinetic models to evaluate their accuracy in predicting ignition behavior.

Contribution

It provides experimental ignition delay data for all butanol isomers at low to intermediate temperatures and compares these with existing kinetic models.

Findings

Ignition delay decreases with increasing temperature.

Reasonable agreement between experiments and models for tert-, iso-, and n-butanol.

Single-stage ignition characteristics observed across conditions.

Abstract

Autoignition delay experiments for the isomers of butanol, including n-, sec-, tert-, and iso-butanol, have been performed using a heated rapid compression machine. For a compressed pressure of 15 bar, the compressed temperatures have been varied in the range of 725-855 K for all the stoichiometric fuel/oxidizer mixtures. Over the conditions investigated in this study, the ignition delay decreases monotonically as temperature increases and exhibits single-stage characteristics. Experimental ignition delays are also compared to simulations computed using three kinetic mechanisms available in the literature. Reasonable agreement is found for three isomers (tert-, iso-, and n-butanol).