Studies of high-pressure n-butane oxidation with CO2dilution up to 100 atm using a supercritical-pressure jet-stirred reactor

Hao Zhao, Chao Yan, Tianhan Zhang, Guoming Ma, Michael J. Souza, Chong Wen Zhou, Yiguang Ju

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

A novel supercritical-pressure jet stirred reactor (SP-JSR) was developed to operate up to 200 atm. The SPJSR provides a unique platform to conduct kinetic studies at low and intermediate temperatures at extreme pressures under uniform temperature distribution and a short flow residence time. n-Butane oxidations with varying levels of CO2 dilutions at pressures of 10 and 100 atm and over a temperature range of 500 K-900 K were conducted using the SP-JSR. The experiment showed that at 100 atm, a weak NTC behavior was observed and the intermediate temperature oxidation was shifted to lower temperatures. Also, the results showed that CO2 addition at supercritical conditions slowed down the fuel oxidation at intermediate temperature while had minimal effect on the low temperature oxidation. The Healy model under-predicts the NTC behavior and shows little sensitivity of the effect of CO2 addition on the n-butane oxidation. Reaction pathway and sensitivity analyses exhibited that both the low and intermediate temperature chemistries are controlled by RO2 consumption pathways.

Original languageEnglish (US)
Pages (from-to)279-287
Number of pages9
JournalProceedings of the Combustion Institute
Volume38
Issue number1
DOIs
StatePublished - 2021
Event38th International Symposium on Combustion, 2021 - Adelaide, Australia
Duration: Jan 24 2021Jan 29 2021

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Keywords

  • High pressure
  • Jet stirred reactor
  • Low temperature chemistry
  • Supercritical kinetics
  • n-Butane

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