Operational characteristics of catalytic combustion in a platinum microtube

Yei Chin Chao, Guan Bang Chen, Chia Juei Hsu, Tzong Shyng Leu, Chih Yung Wu, Tsarng Sheng Cheng

研究成果: Article同行評審

40 引文 斯高帕斯(Scopus)


Catalytic combustion of hydrogen in a platinum microtube, or subquenching diameter tube, is studied via theoretical analysis, experiments, and numerical simulation in terms of the major operation and design parameters. Fine-thermocouple, laser-induced fluorescence (LIF) and Raman scattering are used to measure the temperature and major species and OH concentration data at the tube exit. The experimental results show that the tube-exit temperature increases with fuel concentration, velocity, and tube size. For high fuel concentration and velocity cases in the 1000- and 500-μm tubes, an obvious gas-phase reaction behind the exit can be detected by thermocouple and LIF-OH images. Numerical simulation results show that smaller tube sizes and lower velocities would enhance the conversion ratio on the catalytic surface due to the enhanced diffusion of surface species of H2 and O2. Based on the current results and analysis, the characteristic operation regions of hydrogen catalytic combustion in microtubes are quantitatively identified in terms of parameters related to heat generation and heat loss characteristics, competition among the timescales, and tube size. Decreasing the tube size will shift the operation region toward the high-concentration and high-velocity portion of the domain with a smaller operation area.

頁(從 - 到)1755-1777
期刊Combustion science and technology
出版狀態Published - 2004 10月

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 燃料技術
  • 能源工程與電力技術
  • 物理與天文學 (全部)


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