# A Rapid Compression Study of the Butanol Isomers at Elevated Pressure

## TL;DR

This study examines the autoignition delay of butanol isomers at 15 bar and 725-870 K, revealing their relative reactivity and evaluating existing kinetic models' predictive accuracy.

## Contribution

It provides a rapid experimental comparison of butanol isomers' ignition delays at elevated pressure and assesses the performance of current kinetic mechanisms.

## Key findings

- n-butanol is most reactive among the isomers
- No NTC or two-stage ignition observed under studied conditions
- Existing kinetic models tend to over-predict ignition delays

## Abstract

Investigation of the autoignition delay of the butanol isomers has been performed at elevated pressure of 15 bar and low to intermediate temperatures of 725-870 K. Stoichiometric mixtures made in nitrogen/oxygen air were studied. For the temperature and pressure conditions in this study, no NTC or two-stage ignition behavior were observed. The reactivity of the isomers of butanol, in terms of inverse ignition delay, was ranked as n-butanol > sec-butanol ~ iso-butanol > tert-butanol. Predictions of the ignition delay by several kinetic mechanisms available in the literature generally over-predict the ignition delays.

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Source: https://tomesphere.com/paper/1706.01832