September 2005

Heat Transfer

High temperature air combustion for steam reformers

This novel technology can reduce facility NOx emissions

Blasiak, W., Yang, W., Division of Energy and Furnace Royal Institute of Technology

Steam reformers are generally the largest and most expensive item in hydrogen (H2), ammonia, methanol, direct reduction or other synthesis gas plants. In most facilities, the actual steam reforming process only occurs in the radiant section of the steam reform. The convection process recovers waste heat from the flue gas and cools it enough to be removed by the stack or an ID fan. Recovered heat is used to produce steam or preheat combustion air. Preheated combustion air using exhaust flue gas can offer very high energy efficiency. However, higher preheated combustion air leads to high nitrogen oxide (NOx) emissions if conventional combustion technology is used. Another drawback is

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