Catalytic combustion and Self-ignition characteristics of lean hydrogen-air mixtures in Pt/γ-Al2O3 micro-combustors using detailed chemical reaction mechanism

Research Article

Junjie Chen, Deguang Xu

Corresponding Author : Junjie Chen,

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

Email ID : concjj@163.com

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.V3I3.02. 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.

Journal of Physical and Chemical Sciences

ISSN : 2348-327X

Volume 3 / Issue 3

ScienceQ Publishing Group