The development of integrated, coal-gasification combined cycle (IGCC) systems provides cost-effective and environmentally sound options for meeting future coal-utilizing power generation needs in the world. The Japanese government and the Electric Power Industries in Japan promoted research and development of an IGCC system. We have being working on developing a low- combustion technology used in gas turbine combustors for IGCC. Each gaseous fuel produced from some raw materials contained CO and as the main combustible components, and a small amount of Compositions and calorific values of gasified coal fuels varied widely depending on raw materials and gasifier types. Gaseous fuel, produced in various gasifiers, has a calorific value of 4–13 MJ/m3, which is about one-tenth to one-third that of natural gas. The flame temperatures of fuels increase as the fuel calorific value rises. When the fuel calorific value rises 8 MJ/m3 or higher, the flame temperature is higher than that of natural gas, and so production from nitrogen fixation is expected to increase significantly. Also, some gasified coal fuels contain fuel nitrogen, such as ammonia, if the hot/dry type gas cleaning system is employed. These factors affect the combustion characteristics of the gasified coal fuel. In this paper, we clarified the influence of gasified coal fuel properties on and CO emissions through experiments using a small diffusion burner and through numerical analysis based on reaction kinetics. The main results were as follows: 1 conversion to increases with increasing concentration in gaseous fuel. 2 If gaseous fuel contains there will be some specific equivalence ratio in the primary combustion zone for the minimum conversion to in the two-staged combustion. 3 Its specific equivalence ratio in the primary combustion zone increases with decreasing concentration in gaseous fuel. 4 If the fuel contains a small percent of there is no influence of the molar ratio in the fuel on the conversion rate of to while there is an influence in the case where fuel contains no The conversion rate increases with rises in the molar ratio. 5 As the pressure increases, the conversion rate of to slightly decreases and the CO emission declines significantly.
A Study of Combustion Characteristics of Gasified Coal Fuel
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, IN, June 7–10, 1999; ASME Paper 99-GT-398. Manuscript received by IGTI March 9, 1999; final revision received by the ASME Headquarters May 15, 2000. Associate Technical Editor: D. Wisler.
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Hasegawa , T., Sato, M., and Nakata, T. (May 15, 2000). "A Study of Combustion Characteristics of Gasified Coal Fuel ." ASME. J. Eng. Gas Turbines Power. January 2001; 123(1): 22–32. https://doi.org/10.1115/1.1287586
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