Catalytic Combustion of n-C₄H₁₀ and DME in Swiss-Roll Combustor with Porous Ceramics

Abstract

An experimental study on combustion in Swiss-roll combustor with Pt-coated catalyst porous ceramics was conducted. For n-butane/air or dimethyl ether (DME)/air mixtures, both extinction limits and temperature distributions on an external surface of combustor were determined. The experimental results show that the lean limits of the fuels were actually in fuel rich conditions, and the flammable range of DME is larger than that of n-butane at low Reynolds numbers. The component analysis for the exhaust gas showed that only catalytic reactions occurred in the combustor. The surface temperature distributions indicate that a reaction zone is always in the center region where the catalyst is placed.

Keywords:

• DME
• Extinction limits
• n-C₄H₁₀
• Pt catalyst
• Swiss-roll combustor

ACKNOWLEDGMENT

This work was supported by the National Natural Science Foundation of China (Contract Nos. 50976056, 50721140648, and 50676050).