Experimental and modeling study of C2-C4 alcohol autoignition at intermediate temperature conditions

Song Cheng, Dongil Kang, S. Scott Goldsborough, Chiara Saggese, Scott W. Wagnon, William J. Pitz

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

C2–C4 alcohols are advantageous blendstocks towards enabling efficient, boosted Spark-Ignition (SI) engines. Their use in advanced engine applications requires a comprehensive understanding of their intermediate-temperature autoignition behavior. An experimental and modeling study covering their fundamental autoignition characteristics in a twin-piston rapid compression machine at pressures of 20 and 40 bar, intermediate temperatures from 750 to 980 K, and two fuel loading conditions representative of boosted SI engines was conducted. Direct comparison between these alcohols was made, where the order of reactivity is established across different thermodynamic and fuel loading conditions. Changes in preliminary exothermicity (or intermediate-temperature heat release) displayed in single-stage autoignition across different alcohols and conditions were quantified, providing insight into fuel-to-fuel differences, and how these could affect advanced combustion concepts. Kinetic models were used to simulate the experiments, and reasonable agreement was obtained. The sensitivity analysis results demonstrated the importance of accurately capturing the autoignition kinetics, particularly H-abstraction reactions on the parent fuels by OH and HO2, and the branching ratio associated with these.

Original languageEnglish
Pages (from-to)709-717
Number of pages9
JournalProceedings of the Combustion Institute
Volume38
Issue number1
DOIs
Publication statusPublished - Jan 2021
Externally publishedYes
Event38th International Symposium on Combustion, 2021 - Adelaide, Australia
Duration: 24 Jan 202129 Jan 2021

Keywords

  • Boosted SI engines
  • C2-C4 alcohols
  • Intermediate-temperature autoignition behavior

ASJC Scopus subject areas

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

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