NDLI: Low CO2 Combustion System Retrofits for Existing Heavy Duty Gas Turbines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Peter, J. Stuttaford Oumejjoud, Khalid
Copyright Year	2008
Abstract	CO2 emissions generated by power plants make up a significant portion of global carbon emissions. Although there has been a great deal of focus on new power sources incorporating state of the art environmental protection systems, there has been little focus on addressing the issues of existing power plants. The purpose of this work is to address the options available to existing gas turbine based power plants to retrofit CO2 reduction measures cost effectively at the source of emissions, the combustor. Pre-combustion decarbonization is a highly efficient method of carbon removal, as only a small fraction of the gas turbine system flow needs to be addressed. This results in the requirement to burn a hydrogen based fuel, which presents challenges due to its highly reactive nature. The properties of hydrogen/syngas combustion are reviewed with emphasis on solutions for premixed combustion systems. Premixed combustion as opposed to diffusion combustion systems are key to retrofit solutions for existing gas turbines. Premixed systems provide the life cycle cost benefit, and heat rate benefit of not requiring the addition of diluent to the cycle to control emissions. Fuel flexibility is critical for retrofit systems, allowing operators to run on high hydrogen fuels as well as back-up standard natural gas to maximize power plant availability. Pre-combustion decarbonization may occur remote from the power plant at a centralized fuel processing facility, or it may be integrated into the combined cycle gas turbine power plant. Existing combined cycle power plants operating on natural gas could be modified to incorporate fuel decarbonization into the cycle, minimizing the parasitic loss of such a system while capturing carbon credits which are likely to become of increasing monetary value. An example cycle to address such integrated systems is presented. The focus of this work is to present a cycle to provide decarbonized fuel, cost effectively, from existing natural gas systems, as well as centralized coal/petcoke based fuel processing facilities. An additional focus is on the combustion system design requirements to burn such fuels, which are retrofitable to existing heavy duty gas turbine based power plants.
Sponsorship	International Gas Turbine Institute
Starting Page	597
Ending Page	605
Page Count	9
File Format	PDF
ISBN	9780791843130
DOI	10.1115/GT2008-50814
e-ISBN	0791838242
Volume Number	Volume 3: Combustion, Fuels and Emissions, Parts A and B
Conference Proceedings	ASME Turbo Expo 2008: Power for Land, Sea, and Air
Language	English
Publisher Date	2008-06-09
Publisher Place	Berlin, Germany
Access Restriction	Subscribed
Subject Keyword	Cycles Hydrogen fuels Hydrogen Carbon dioxide Combustion Fuels Syngas Design Gas turbines Coal Power stations Combustion systems Fuel processing Combined cycle power stations Life cycle costing Combined cycle gas turbines Integrated systems Carbon Diffusion (physics) Flow (dynamics) Emissions Heat Combustion chambers Natural gas Diluents
Content Type	Text
Resource Type	Article

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