Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces

Junjie Chen; Wenya Song

doi:doi:10.11648/j.css.20170201.15

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Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces

Junjie Chen, Wenya Song

Received: 6 January 2017 Accepted: 16 January 2017 Published: 9 February 2017

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Abstract

Surface ignition and extinction of very fuel-lean hydrogen-air mixtures on platinum surfaces were modeled using a detailed surface kinetic mechanism and transport phenomena. A stagnation-point flow geometry was employed to study the effect of heat flux, flow velocity, and composition on the surface ignition and extinction. The temperature and concentration on platinum surfaces as well as the coverage of surface species were also explored to evaluate the role of gas-phase chemistry. It was shown that the platinum surface can be poisoned by different adsorbates, and the dynamic process of surface ignition and extinction is associated with a phase transition from one poisoning species to another. For certain temperatures, multiple poisoned states of the surface coexist. Comparisons of simulations with experiments were carried out, and the results revealed that the self-inhibition of hydrogen surface ignition is caused by poisoning of platinum by atomic hydrogen.

DOI	10.11648/j.css.20170201.15
Published in	Colloid and Surface Science (Volume 2, Issue 1, March 2017)
Page(s)	37-42
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Surface Reaction, Surface Kinetics, Adsorption Kinetics, Desorption Kinetics, Platinum Surface, Catalytic Ignition

References

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APA Style

Junjie Chen, Wenya Song. (2017). Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid and Surface Science, 2(1), 37-42. https://doi.org/10.11648/j.css.20170201.15

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ACS Style

Junjie Chen; Wenya Song. Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid Surf. Sci. 2017, 2(1), 37-42. doi: 10.11648/j.css.20170201.15

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AMA Style

Junjie Chen, Wenya Song. Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid Surf Sci. 2017;2(1):37-42. doi: 10.11648/j.css.20170201.15

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@article{10.11648/j.css.20170201.15,
  author = {Junjie Chen and Wenya Song},
  title = {Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces},
  journal = {Colloid and Surface Science},
  volume = {2},
  number = {1},
  pages = {37-42},
  doi = {10.11648/j.css.20170201.15},
  url = {https://doi.org/10.11648/j.css.20170201.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.css.20170201.15},
  abstract = {Surface ignition and extinction of very fuel-lean hydrogen-air mixtures on platinum surfaces were modeled using a detailed surface kinetic mechanism and transport phenomena. A stagnation-point flow geometry was employed to study the effect of heat flux, flow velocity, and composition on the surface ignition and extinction. The temperature and concentration on platinum surfaces as well as the coverage of surface species were also explored to evaluate the role of gas-phase chemistry. It was shown that the platinum surface can be poisoned by different adsorbates, and the dynamic process of surface ignition and extinction is associated with a phase transition from one poisoning species to another. For certain temperatures, multiple poisoned states of the surface coexist. Comparisons of simulations with experiments were carried out, and the results revealed that the self-inhibition of hydrogen surface ignition is caused by poisoning of platinum by atomic hydrogen.},
 year = {2017}
}

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TY  - JOUR
T1  - Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces
AU  - Junjie Chen
AU  - Wenya Song
Y1  - 2017/02/09
PY  - 2017
N1  - https://doi.org/10.11648/j.css.20170201.15
DO  - 10.11648/j.css.20170201.15
T2  - Colloid and Surface Science
JF  - Colloid and Surface Science
JO  - Colloid and Surface Science
SP  - 37
EP  - 42
PB  - Science Publishing Group
SN  - 2578-9236
UR  - https://doi.org/10.11648/j.css.20170201.15
AB  - Surface ignition and extinction of very fuel-lean hydrogen-air mixtures on platinum surfaces were modeled using a detailed surface kinetic mechanism and transport phenomena. A stagnation-point flow geometry was employed to study the effect of heat flux, flow velocity, and composition on the surface ignition and extinction. The temperature and concentration on platinum surfaces as well as the coverage of surface species were also explored to evaluate the role of gas-phase chemistry. It was shown that the platinum surface can be poisoned by different adsorbates, and the dynamic process of surface ignition and extinction is associated with a phase transition from one poisoning species to another. For certain temperatures, multiple poisoned states of the surface coexist. Comparisons of simulations with experiments were carried out, and the results revealed that the self-inhibition of hydrogen surface ignition is caused by poisoning of platinum by atomic hydrogen.
VL  - 2
IS  - 1
ER  -

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Author Information

Junjie Chen

Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, China
Wenya Song

Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, China

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APA Style

Junjie Chen, Wenya Song. (2017). Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid and Surface Science, 2(1), 37-42. https://doi.org/10.11648/j.css.20170201.15

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ACS Style

Junjie Chen; Wenya Song. Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid Surf. Sci. 2017, 2(1), 37-42. doi: 10.11648/j.css.20170201.15

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AMA Style

Junjie Chen, Wenya Song. Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces. Colloid Surf Sci. 2017;2(1):37-42. doi: 10.11648/j.css.20170201.15

Copy | Download

@article{10.11648/j.css.20170201.15,
  author = {Junjie Chen and Wenya Song},
  title = {Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces},
  journal = {Colloid and Surface Science},
  volume = {2},
  number = {1},
  pages = {37-42},
  doi = {10.11648/j.css.20170201.15},
  url = {https://doi.org/10.11648/j.css.20170201.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.css.20170201.15},
  abstract = {Surface ignition and extinction of very fuel-lean hydrogen-air mixtures on platinum surfaces were modeled using a detailed surface kinetic mechanism and transport phenomena. A stagnation-point flow geometry was employed to study the effect of heat flux, flow velocity, and composition on the surface ignition and extinction. The temperature and concentration on platinum surfaces as well as the coverage of surface species were also explored to evaluate the role of gas-phase chemistry. It was shown that the platinum surface can be poisoned by different adsorbates, and the dynamic process of surface ignition and extinction is associated with a phase transition from one poisoning species to another. For certain temperatures, multiple poisoned states of the surface coexist. Comparisons of simulations with experiments were carried out, and the results revealed that the self-inhibition of hydrogen surface ignition is caused by poisoning of platinum by atomic hydrogen.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Catalytic Ignition and Extinction of Very Fuel-Lean Hydrogen-Air Mixtures on Platinum Surfaces
AU  - Junjie Chen
AU  - Wenya Song
Y1  - 2017/02/09
PY  - 2017
N1  - https://doi.org/10.11648/j.css.20170201.15
DO  - 10.11648/j.css.20170201.15
T2  - Colloid and Surface Science
JF  - Colloid and Surface Science
JO  - Colloid and Surface Science
SP  - 37
EP  - 42
PB  - Science Publishing Group
SN  - 2578-9236
UR  - https://doi.org/10.11648/j.css.20170201.15
AB  - Surface ignition and extinction of very fuel-lean hydrogen-air mixtures on platinum surfaces were modeled using a detailed surface kinetic mechanism and transport phenomena. A stagnation-point flow geometry was employed to study the effect of heat flux, flow velocity, and composition on the surface ignition and extinction. The temperature and concentration on platinum surfaces as well as the coverage of surface species were also explored to evaluate the role of gas-phase chemistry. It was shown that the platinum surface can be poisoned by different adsorbates, and the dynamic process of surface ignition and extinction is associated with a phase transition from one poisoning species to another. For certain temperatures, multiple poisoned states of the surface coexist. Comparisons of simulations with experiments were carried out, and the results revealed that the self-inhibition of hydrogen surface ignition is caused by poisoning of platinum by atomic hydrogen.
VL  - 2
IS  - 1
ER  -

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