Catalytic combustion and Self-ignition characteristics of lean hydrogen-air mixtures in Pt/γ-Al2O3 micro-combustors using detailed chemical reaction mechanism
Junjie Chen, Deguang Xu
Corresponding Author : Junjie Chen,
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.
Email ID : firstname.lastname@example.org
Received : 2015-07-22 Accepted : 2015-09-25 Published : 2015-09-25
Abstract : Catalytic combustion and self-ignition characteristics of lean hydrogen-air mixtures in micro-combustors with Pt/γ-Al2O3-coated walls were investigated numerically using elementary heterogeneous (catalytic) and homogeneous (gas-phase) chemical reaction schemes and detailed transport. Simulations indicate that the large thermal inertia of the micro-combustor solid structure leads to slow temperature dynamics, and transient response is dominated by the thermal inertia. The time required to reach steady state decreases with increasing inlet velocity and decreasing wall thermal conductivity. The heat localization in poorly conducting walls leads to fast ignition and shorter steady state time. The steady and transient state behavior of these micro-scale systems is described.
Keywords : micro-combustion; catalytic combustion; self-ignition; chemical reaction mechanism; micro-combustor
Citation : Junjie Chen et al.. (2015) Catalytic combustion and Self-ignition characteristics of lean hydrogen-air mixtures in Pt/γ-Al2O3 micro-combustors using detailed chemical reaction mechanism. j. of Physical and Chemical Sciences.V3I3 DOI : 10.5281/zenodo.1000221
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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