Studies on a High-Temperature Air Combustion Burner for a Compact Fuel-Cell Reformer

Abstract:

A new burner configuration for a compact fuel-cell reformer with a high-temperature air combustion concept was studied. The burner was computationally designed for a 40 Nm3/hr hydrogen-generating reformer using natural gas-steam reforming method. In order to satisfy the primary requirements for designing a reformer burner (uniform distribution of temperature along the fuel processor walls and minimum heat losses from the reformer), the features of the present burner configuration included 1) a self-regenerative burner for an exhaust-gas-recirculation to apply for the high-temperature air combustion concept, and 2) an annular-type shield for protecting direct contact of flame with the processor walls. For the present design conditions, the predicted temperature distributions along the processor walls were found uniform within 100 K variation. Thus, the present burner configuration satisfied the requirement for reducing temperature gradients along the processor walls, and consequently demonstrated that the high-temperature air combustion concept could be applied to the practical fuel reformers for use of fuel cells. The predicted uniform temperature distributions along the processor walls were experimentally demonstrated for a test burner.

• Periodical: Solid State Phenomena (Volume 120)
• Pages: 135-140
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.120.135
• Online since: February 2007
• Authors: K.H. Lee, Oh Chae Kwon
• Keywords: Compact Reformer, Exhaust Gas Recirculation (EGR), Fuel Cell (FC), High-Temperature Air Combustion (HTAC), Natural Gas/Steam Reforming

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