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RESEARCH PAPERS: Gas Turbines: Combustion and Fuels

Reducing Gas Turbine Emissions Through Hydrogen-Enhanced, Steam-Injected Combustion

[+] Author and Article Information
J. R. Maughan, J. H. Bowen

GE Corporate R&D, General Electric Company, Schenectady, NY 12301

D. H. Cooke

M. W. Kellogg Company, Houston, TX 77210

J. J. Tuzson

Gas Research Institute, Chicago, IL 60202

J. Eng. Gas Turbines Power 118(1), 78-85 (Jan 01, 1996) (8 pages) doi:10.1115/1.2816553 History: Received July 11, 1994; Online November 19, 2007

Abstract

The Potential for reducing emissions from gas turbines by injecting steam for Nox control and hydrogen for Co control is evaluated through laboratory-scale combustion experiments. Results showed that hydrogen addition into a steam-injected diffusion combustor at hydrogen/fuel molar ratios of approximately 20 percent was associated with somewhat increased NOx production and reduced CO emissions. Both effects are attributed to an increase in the local stoichiometric flame temperature. However, the decrease in CO was greater than the increase in NOx , resulting in a net emissions benefit, or a shifting of the NOx –CO curve toward the origin. Consequently, a greater range of NOx /CO emissions targets could be achieved when hydrogen was available. Additional experiments on premixed systems with hydrogen injection showed a significant increase in operability. Cost estimates for producing hydrogen with a conventional fired steam reformer suggested high capital costs unless ample steam, is already available. Hence, the technology is particularly well suited for turbines that use steam for power augmentation. Alternate reforming technology, such as catalytic partial oxidation, offers the potential for reduced capital costs.

Copyright © 1996 by The American Society of Mechanical Engineers
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