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Computational Fluid Dynamics Simulation of Bio-Syngas Hetero-/Homogeneous Combustion over Platinum in Catalytic Micro-Combustors
Research article
  

Computational Fluid Dynamics Simulation of Bio-Syngas Hetero-/Homogeneous Combustion over Platinum in Catalytic Micro-Combustors


Junjie Chen, Wenya Song

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


Corresponding author :

Junjie Chen,
Email:

Received: November 12, 2014,   Accepted: December 15, 2015,   Published: December 15, 2015.


Abstract:

Bio-syngas is a synthetic gas obtained from the thermal gasification of biomass. It contains carbon monoxide and hydrogen which is thought to be a cleaner fuel than biogas owing to its higher hydrogen content. In this work, the bio-syngas hetero-/homogeneous combustion over platinum in catalytic micro-combustors were studied through two-dimensional computational fluid dynamics model. Numerical simulations were carried out with a two-dimensional elliptic computational fluid dynamics code in conjunction with full-elliptic flow description, detailed hetero-/homogeneous chemistry, and all relevant heat transfer mechanisms in catalytic micro-combustors. In addition, we also studied the light-off of mixtures of carbon monoxide and hydrogen under lean conditions. The self-inhibition of carbon monoxide was found. Increasing carbon monoxide compositions result in an increase in the light-off temperature. Addition of hydrogen to the feed causes a reduction in light-off temperature for all compositions of carbon monoxide studied. The most significant shift in light-off temperature occurs with the addition of small amounts of hydrogen with only minor marginal enhancement occurring at higher hydrogen concentrations. Hydrogen alone in a lean atmosphere will oxidize at room temperature. Upon changing the activation energy between adsorbed hydrogen and oxygen, the carbon monoxide was observed to oxidize first, however, no enhancement of light-off was predicted.


Keywords: Bio-syngas; Homogeneous combustion; Heterogeneous combustion; Micro-combustion; Light-off; Platinum catalyst; Computational fluid dynamics


Citation:

Junjie Chen et al. (2015). Computational Fluid Dynamics Simulation of Bio-Syngas Hetero-/Homogeneous Combustion over Platinum in Catalytic Micro-Combustors. J. of Bioprocessing and Chemical Engineering. V3I4. DOI: 10.15297/JBCE.V3I4.03


Copyright:

© 2015 Junjie Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


      
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      Journal of Bioprocessing and Chemical Engineering