Development of a combustion technology for ultra-low emission (< 5 ppm nox) industrial burner

Conference · Fri Nov 01 04:00:00 EST 2002

OSTI ID:810477

Littlejohn, D ^[1]; Majeski, A J; Cheng, R K; Castaldini, C

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1. LBNL Library

A combustion concept to achieve ultra-low emissions (NO{sub x} {le} 2 ppm and CO {le} 20 ppm) was tested on an 18 kW low swirl burner (LSB). It is based on lean premixed combustion combined with flue gas recirculation (FGR) and partially reformed natural gas (PRNG). Flame stability and emissions were assessed as a function of {phi}, FGR, and PRNG. The results show that PRNG improves flame stability and reduces CO, with no impact on NO{sub x} at {phi} = 0.8. A 1D flame simulation satisfactorily predicted prompt NO{sub x} at lean conditions with high FGR. Two catalysts were tested in a prototype steam reformer, and the results were used to estimate reactor volume and steam requirements in a practical system. An advanced Sud Chemie catalyst displayed good conversion efficiency at relatively low temperatures and high space velocities, which indicates that the reformer can be small and will track load changes. Tests conducted on the LSB with FGR and 0.05 PRNG shows that boilers using a LSB with PRNG and high FGR and {phi} close to stoichiometry can operate with low emissions and high efficiency.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: U.S. Department of Energy. Assistant Secretary for Energy Efficiency and Renewable Industrial Sector - Total (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 810477
• Report Number(s): LBNL--48881
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BOILERS
BURNERS
CATALYSTS
COMBUSTION
EFFICIENCY
FLAMES
FLUE GAS
NATURAL GAS
SIMULATION
STABILITY
STEAM
STOICHIOMETRY