skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.

Abstract

Future energy systems based on gasification of coal or biomass for co-production of electrical power and fuels may require gas turbine operation on unusual gaseous fuel mixtures. In addition, global climate change concerns may dictate the generation of a CO{sub 2} product stream for end-use or sequestration, with potential impacts on the oxidizer used in the gas turbine. In this study the operation at atmospheric pressure of a small, optically accessible swirl-stabilized premixed combustor, burning fuels ranging from pure methane to conventional and H{sub 2}-rich and H{sub 2}-lean syngas mixtures is investigated. Both air and CO{sub 2}-diluted oxygen are used as oxidizers. CO and NO{sub x} emissions for these flames have been determined from the lean blowout limit to slightly rich conditions ({phi} - 1.03). In practice, CO{sub 2}-diluted oxygen systems will likely be operated close to stoichiometric conditions to minimize oxygen consumption while achieving acceptable NO{sub x} performance. The presence of hydrogen in the syngas fuel mixtures results in more compact, higher temperature flames, resulting in increased flame stability and higher NO{sub x} emissions. Consistent with previous experience, the stoichiometry of lean blowout decreases with increasing H{sub 2} content in the syngas. Similarly, the lean stoichiometry at which COmore » emissions become significant decreases with increasing H{sub 2} content. For the mixtures investigated, CO emissions near the stoichiometric point do not become significant until {phi} > 0.95. At this stoichiometric limit, CO emissions rise more rapidly for combustion in O{sub 2}-CO{sub 2} mixtures than for combustion in air.« less

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1028907
Report Number(s):
SAND2007-0041C
TRN: US201122%%602
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the ASME Turbo Expo 2007 held May 14-17, 2007 in Montreal, Canada.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; 08 HYDROGEN; 09 BIOMASS FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ATMOSPHERIC PRESSURE; BIOMASS; BLOWOUTS; CLIMATIC CHANGE; COAL; COMBUSTION; ENERGY SYSTEMS; FLAMES; GAS TURBINES; GASIFICATION; HYDROGEN; METHANE; MIXTURES; OXIDIZERS; OXYGEN; STABILITY; STOICHIOMETRY; SYNGAS PROCESS

Citation Formats

Williams, Timothy C., Shaddix, Christopher R., and Schefer, Robert W. Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.. United States: N. p., 2007. Web.
Williams, Timothy C., Shaddix, Christopher R., & Schefer, Robert W. Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.. United States.
Williams, Timothy C., Shaddix, Christopher R., and Schefer, Robert W. Mon . "Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.". United States. doi:.
@article{osti_1028907,
title = {Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.},
author = {Williams, Timothy C. and Shaddix, Christopher R. and Schefer, Robert W.},
abstractNote = {Future energy systems based on gasification of coal or biomass for co-production of electrical power and fuels may require gas turbine operation on unusual gaseous fuel mixtures. In addition, global climate change concerns may dictate the generation of a CO{sub 2} product stream for end-use or sequestration, with potential impacts on the oxidizer used in the gas turbine. In this study the operation at atmospheric pressure of a small, optically accessible swirl-stabilized premixed combustor, burning fuels ranging from pure methane to conventional and H{sub 2}-rich and H{sub 2}-lean syngas mixtures is investigated. Both air and CO{sub 2}-diluted oxygen are used as oxidizers. CO and NO{sub x} emissions for these flames have been determined from the lean blowout limit to slightly rich conditions ({phi} - 1.03). In practice, CO{sub 2}-diluted oxygen systems will likely be operated close to stoichiometric conditions to minimize oxygen consumption while achieving acceptable NO{sub x} performance. The presence of hydrogen in the syngas fuel mixtures results in more compact, higher temperature flames, resulting in increased flame stability and higher NO{sub x} emissions. Consistent with previous experience, the stoichiometry of lean blowout decreases with increasing H{sub 2} content in the syngas. Similarly, the lean stoichiometry at which CO emissions become significant decreases with increasing H{sub 2} content. For the mixtures investigated, CO emissions near the stoichiometric point do not become significant until {phi} > 0.95. At this stoichiometric limit, CO emissions rise more rapidly for combustion in O{sub 2}-CO{sub 2} mixtures than for combustion in air.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: