Title: High-temperature micro catalytic combustor with Pd/nano-porous alumina
Abstract: A micro-scale catalytic combustor using high-precision ceramic tape-casting technology has been developed for high-temperature applications such as thermophotovoltaic power generation. Pd catalyst/nano-porous alumina support fabricated through anodic oxidation was employed for the catalyst layer having good adhesion to the substrate. It is found that the ignition temperature of the present catalyst is around 225 °C, and its activity is as high as the catalyst prepared with the conventional sol–gel methods. In order to minimize thermal stress at high operation temperature, catalyst arrangement that gives minimum temperature gradient has been proposed based on a series of CFD analysis of heat and fluid flow and surface reaction in micro channels. In combustion experiments with a prototype combustor, the wall temperature as high as 850 °C and extremely high heat generation density of 2–5 × 108 W/m3 have been achieved. It is also found that the wall temperature gradient is significantly reduced with the present catalyst arrangement.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 31
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