Laminar flame speed, markstein length and flame chemistry of the butanol isomers from 1 atm to 5 atm

Fujia Wu, Chung K. Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Laminar flame speeds and Markstein lengths for n-butanol, s-butanol, i-butanol and t-butanol at pressures from 1 atm to 5 atm were experimentally measured in a heated, dual-chamber vessel. Results at all pressures show that n-butanol has the highest flame speeds, followed by s-butanol and ibutanol, and then t-butanol, which quantitatively agree reasonably well with the computed results using the recent mechanism of Sarathy and co-authors. Results further show that while the isomers have different Markstein lengths, they have similar Markstein numbers which is the appropriate nondimensional parameter to quantify flame stretch. Investigations on thermal effects, reaction rate sensitivities, intermediate species distributions and reaction paths subsequently demonstrate that kinetic effect is the primary reason for the ordering of the flame speed. Specifically, since s-butanol, i-butanol and t-butanol all have branched molecular structures, they crack into relatively stable branched intermediate species, such as iso-butene, iso-propenol and acetone, with the resulting flame speeds depending on the extent of fuel molecule branching.

Original languageEnglish (US)
Title of host publication8th US National Combustion Meeting 2013
PublisherWestern States Section/Combustion Institute
Pages2516-2534
Number of pages19
ISBN (Electronic)9781627488426
StatePublished - Jan 1 2013
Event8th US National Combustion Meeting 2013 - Park City, United States
Duration: May 19 2013May 22 2013

Publication series

Name8th US National Combustion Meeting 2013
Volume3

Other

Other8th US National Combustion Meeting 2013
CountryUnited States
CityPark City
Period5/19/135/22/13

All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Wu, F., & Law, C. K. (2013). Laminar flame speed, markstein length and flame chemistry of the butanol isomers from 1 atm to 5 atm. In 8th US National Combustion Meeting 2013 (pp. 2516-2534). (8th US National Combustion Meeting 2013; Vol. 3). Western States Section/Combustion Institute.