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Title: Effects of hydrogen addition on combustion characteristics of n-decane/air mixtures

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Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Combustion Energy Frontier Research Center (CEFRC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Combustion and Flame; Journal Volume: 161; Journal Issue: 9; Related Information: CEFRC partners with Princeton University (lead); Argonne National Laboratory; University of Connecticut; Cornell University; Massachusetts Institute of Technology; University of Minnesota; Sandia National Laboratories; University of Southern California; Stanford University; University of Wisconsin, Madison
Country of Publication:
United States
biofuels (including algae and biomass), hydrogen and fuel cells, combustion, carbon capture

Citation Formats

Hui, Xin, Zhang, Chi, Xia, Meng, and Sung, Chih-Jen. Effects of hydrogen addition on combustion characteristics of n-decane/air mixtures. United States: N. p., 2014. Web. doi:10.1016/j.combustflame.2014.03.007.
Hui, Xin, Zhang, Chi, Xia, Meng, & Sung, Chih-Jen. Effects of hydrogen addition on combustion characteristics of n-decane/air mixtures. United States. doi:10.1016/j.combustflame.2014.03.007.
Hui, Xin, Zhang, Chi, Xia, Meng, and Sung, Chih-Jen. Mon . "Effects of hydrogen addition on combustion characteristics of n-decane/air mixtures". United States. doi:10.1016/j.combustflame.2014.03.007.
title = {Effects of hydrogen addition on combustion characteristics of n-decane/air mixtures},
author = {Hui, Xin and Zhang, Chi and Xia, Meng and Sung, Chih-Jen},
abstractNote = {},
doi = {10.1016/j.combustflame.2014.03.007},
journal = {Combustion and Flame},
number = 9,
volume = 161,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
  • The autoignition of {alpha}-methylnaphthalene (AMN), the bicyclic aromatic reference compound for the cetane number (CN), and AMN/n-decane blends, potential diesel surrogate mixtures, was studied at elevated pressures for fuel/air mixtures in a heated high-pressure shock tube. Additionally, a comprehensive kinetic mechanism was developed to describe the oxidation of AMN and AMN/n-decane blends. Ignition delay times were measured in reflected shock experiments for {phi} = 0.5, 1.0, and 1.5 AMN/air mixtures (CN = 0) for 1032-1445 K and 8-45 bar and for {phi} = 1.0 30%-molar AMN/70%-molar n-decane/air (CN = 58) and 70%-molar AMN/30%-molar n-decane/air mixtures (CN = 28) for 848-1349more » K and 14-62 bar. Kinetic simulations, based on the comprehensive AMN/n-decane mechanism, are in good agreement with measured ignition times, illustrating the emerging capability of comprehensive mechanisms for describing high molecular weight transportation fuels. Sensitivity and reaction flux analysis indicate the importance of reactions involving resonance stabilized phenylbenzyl radicals, the formation of which by H-atom abstractions with OH radicals has an important inhibiting effect on ignition. (author)« less
  • The stretch-affected propagation speeds of expanding spherical flames of n-butane–air mixtures with hydrogen addition were measured at atmospheric pressure and subsequently processed through a nonlinear regression analysis to yield the stretch-free laminar flame speeds. Based on a hydrogen addition parameter (R H) and an effective fuel equivalence ratio (Φ F), these laminar flame speeds were found to increase almost linearly with R H, for Φ F between 0.6 and 1.4 and RHRH from 0 to 0.5, with the slope of the variation assuming a minimum around stoichiometry. These experimental results also agree well with computed values using a detailed reactionmore » mechanism. Furthermore, a mechanistic investigation aided by sensitivity analysis identified that kinetic effects through the global activation energy, followed by thermal effects through the adiabatic flame temperature, have the most influence on the increase in the flame speeds and the associated linear variation with R H due to hydrogen addition. Nonequidiffusion effects due to the high mobility of hydrogen, through the global Lewis number, have the least influence. Further calculations for methane, ethene, and propane as the fuel showed similar behavior, leading to possible generalization of the phenomena and correlation.« less
  • Laminar flame speeds of n-decane/air and n-dodecane/air mixtures are measured using the counterflow twin-flame configuration at preheat temperatures ranging from 360 to 470 K and equivalence ratios ranging from 0.7 to 1.4. Extinction stretch rate measurement as a function of equivalence ratio is also carried out for fuel/O{sub 2}/N{sub 2} mixtures with [N{sub 2}/(O{sub 2} + N{sub 2})] = 0.84 by mole and preheat temperature of 400 K. All experiments are conducted under atmospheric pressure conditions. In addition, the overall activation energies of n-decane/air mixtures at varying equivalence ratios are deduced. The experimental data for laminar flame speeds and extinctionmore » stretch rates are also simulated using chemical kinetic mechanisms available in the literature. Comparison of the experimental and computed results demonstrates the deficiencies of the existing mechanisms. Although sensitivity analysis is performed to identify the most sensitive reactions pertinent to laminar flame speed and extinction limit, the results are unable to assess the adequacy of the chemistry involving large hydrocarbons. (author)« less