Paper Title:
Numerical Simulation on Catalytic Combustion of Hydrogen inside Micro Tube
  Abstract

Catalytic combustion of hydrogen/air mixture inside micro-tube was numerically investigated with detailed gas phase and surface catalytic chemical reaction mechanisms. Combustion characteristics for different reaction models, the influence of wall thermal conductivity, inlet velocity, and tube diameter on surface catalytic combustion reaction were discussed. The Computational results indicate that the surface catalytic combustion restrains the gas phase combustion. The higher wall temperature gradient for low wall thermal conductivity will promote the gas phase combustion shift upstream and will result in a higher temperature distribution. The micro-tube can be divided into two regions. The upstream region is dominated by the surface catalytic reaction and the downstream region is dominated by the gas phase combustion. With increasing inlet velocity, the region dominated by surface catalytic reactions expanded downstream and finally occupied the whole tube. The temperature of the flame core decreases with the decrease of tube diameter. Decreasing the tube diameter will enhance the surface catalytic reactions. Some theoretical evidences are provided for the application of catalytic combustion to Micro-electromechanical System (MEMS) and the extension of the combustion limits.

  Info
Periodical
Advanced Materials Research (Volumes 354-355)
Chapter
Chapter 1: Engineering Thermophysics
Edited by
Hao Zhang, Yang Fu and Zhong Tang
Pages
57-61
DOI
10.4028/www.scientific.net/AMR.354-355.57
Citation
J. J. Chen, Q. Wang, Z. X. He, J. F. Pan, "Numerical Simulation on Catalytic Combustion of Hydrogen inside Micro Tube", Advanced Materials Research, Vols. 354-355, pp. 57-61, 2012
Online since
October 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jun Jie Chen, Qian Wang, Jian Feng Pan, Zhi Xia He
Chapter 4: NEMS/MEMS Technology and Equipment
Abstract:Catalytic combustion of hydrogen/air mixture inside micro-tube was numerically investigated with detailed gas phase and surface catalytic...
265
Authors: Qian Wang, Xiao Jing Han, Ping Qi, Jing Wang
Chapter 3: Power Machinery and Engineering
Abstract:A three-dimensional model of a diesel Urea-SCR(Selective Catalytic Reduction)catalytic converter system was set up with aid of CFD software...
513
Authors: Shi Hong Zhang, Juan Li, Xing Xing Shi
Chapter 1: Engineering Thermophysics
Abstract:This article discussed the temperature field and heat transfer inside catalytic combustion furnace with Pd-based honeycomb monoliths of lean...
66
Authors: Zhan Jun Cai, Wei Min Kang, Ya Bin Li
Chapter 1: Computational Mechanics, Designing of Machine Parts and Mechanisms, Power Engineering
Abstract:. This paper studies the different diameters of tube outlet how to affect the gas flow pressure and velocity distribution in nanofiber...
16