Mechanism Reduction for Hetero-/Homogeneous Combustion of Syngas over Platinum
Detailed catalytic and gas-phase reaction mechanisms were reduced for the hetero-/homogeneous combustion of H2/CO/O2/N2 mixtures using the directed relation graph (DRG) method. Simulations were performed in a Pt-coated planar channel using a 2-D steady Navier Stokes code with either detailed or reduced catalytic and gas-phase reaction mechanisms for a wide range of operating conditions. Catalytic and gas-phase reaction mechanisms were treated as a unit and reduced together for fuel-lean and low-pressure fuel-rich cases, while reduced separately for high-pressure fuel-rich cases. The reduced mechanisms well reproduced the major gaseous species concentrations, gas temperatures and homogeneous ignition distances obtained with the detailed mechanisms, thus demonstrating the capacity of DRG in reducing combined catalytic/gas-phase reaction mechanisms. As such, it can provide a quick indication of the important reactions and contributions of both reaction pathways prior to simulations, and is of main interest for large scale simulations used for the design and thermal management of practical catalytic combustion systems.
R. Sui et al., "Mechanism Reduction for Hetero-/Homogeneous Combustion of Syngas over Platinum," Proceedings of the 12th Asia-Pacific Conference on Combustion (2019, Fukuoka, Japan), Combustion Institute, Jul 2019.
12th Asia-Pacific Conference on Combustion, ASPACC 2019 (2019: Jul. 1-5, Fukuoka, Japan)
Mechanical and Aerospace Engineering
Keywords and Phrases
Catalysis; Combustion; Directed graphs; Fuels; Navier Stokes equations; Phase interfaces; Platinum, Catalytic combustion system; Directed relation graph; Gas-phase reactions; Gaseous species concentrations; Large scale simulations; Mechanism reduction; Operating condition; Reduced mechanisms, Gases
Article - Conference proceedings
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01 Jul 2019