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The comparative and combined effects of hydrogen addition on the laminar burning velocities of methane and its blends with ethane and propane

Nilsson, Elna J K LU ; van Sprang, Astrid; Larfeldt, Jenny LU and Konnov, Alexander A. LU (2017) In Fuel 189. p.369-376
Abstract

Laminar burning velocities of hydrocarbon blends of relevance to natural gas combustion, with addition of 0, 10, 35 and 50% hydrogen, were measured using the heat flux method. Hydrocarbon blends were methane (80%)/ethane (20%), methane (80%)/propane (20%) and methane (80%)/ethane (10%)/propane (10%), and in addition experiments were performed using pure methane as a fuel. For the first time it was shown experimentally that hydrogen promotes laminar burning velocity of blends with heavier hydrocarbons to a smaller extent than the well-studied effect on methane. Measurements show that enrichment by hydrogen results in 20–40% lower increase in laminar burning velocity for hydrocarbon blends compared to pure methane, depending on... (More)

Laminar burning velocities of hydrocarbon blends of relevance to natural gas combustion, with addition of 0, 10, 35 and 50% hydrogen, were measured using the heat flux method. Hydrocarbon blends were methane (80%)/ethane (20%), methane (80%)/propane (20%) and methane (80%)/ethane (10%)/propane (10%), and in addition experiments were performed using pure methane as a fuel. For the first time it was shown experimentally that hydrogen promotes laminar burning velocity of blends with heavier hydrocarbons to a smaller extent than the well-studied effect on methane. Measurements show that enrichment by hydrogen results in 20–40% lower increase in laminar burning velocity for hydrocarbon blends compared to pure methane, depending on stoichiometry. Modeling points at the importance of increasing concentrations of OH, O and H radicals in H2 enriched flames. At lean conditions increase in H atom concentration is of particular importance. The results are rationalized based on asymptotic flame theory analysis.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ethane, Flame enhancement, Hydrogen, Laminar burning velocity, Methane, Propane
in
Fuel
volume
189
pages
8 pages
publisher
Elsevier
external identifiers
  • scopus:84994508094
  • wos:000387775500036
ISSN
0016-2361
DOI
10.1016/j.fuel.2016.10.103
language
English
LU publication?
yes
id
b9dea9e2-581f-4dee-9226-cfb966f0c51c
date added to LUP
2017-02-06 07:46:02
date last changed
2018-03-25 04:33:54
@article{b9dea9e2-581f-4dee-9226-cfb966f0c51c,
  abstract     = {<p>Laminar burning velocities of hydrocarbon blends of relevance to natural gas combustion, with addition of 0, 10, 35 and 50% hydrogen, were measured using the heat flux method. Hydrocarbon blends were methane (80%)/ethane (20%), methane (80%)/propane (20%) and methane (80%)/ethane (10%)/propane (10%), and in addition experiments were performed using pure methane as a fuel. For the first time it was shown experimentally that hydrogen promotes laminar burning velocity of blends with heavier hydrocarbons to a smaller extent than the well-studied effect on methane. Measurements show that enrichment by hydrogen results in 20–40% lower increase in laminar burning velocity for hydrocarbon blends compared to pure methane, depending on stoichiometry. Modeling points at the importance of increasing concentrations of OH, O and H radicals in H<sub>2</sub> enriched flames. At lean conditions increase in H atom concentration is of particular importance. The results are rationalized based on asymptotic flame theory analysis.</p>},
  author       = {Nilsson, Elna J K and van Sprang, Astrid and Larfeldt, Jenny and Konnov, Alexander A.},
  issn         = {0016-2361},
  keyword      = {Ethane,Flame enhancement,Hydrogen,Laminar burning velocity,Methane,Propane},
  language     = {eng},
  month        = {02},
  pages        = {369--376},
  publisher    = {Elsevier},
  series       = {Fuel},
  title        = {The comparative and combined effects of hydrogen addition on the laminar burning velocities of methane and its blends with ethane and propane},
  url          = {http://dx.doi.org/10.1016/j.fuel.2016.10.103},
  volume       = {189},
  year         = {2017},
}