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Advanced coal based power generation systems such as the British Coal Topping Cycle offer the potential for high efficiency electricity generation with low environmental impact. An important component of the British Coal Topping Cycle programme is the development of a gas turbine combustion system to burn low calorific value fuel gas, with the minimum emission of NO(x). A prototype gas turbine combustor has been designed at a relatively small scale, and evaluated. Its performance was encouraging. Fuel gas ignition was obtained easily, and stable combustion conditions achieved with a wide range of air fuel ratios. Combustion-efficiency was excellent (greater than 99.9 %). Reducing hydrogen concentration in the fuel gas from 15 % to 11.6 % had negligible effect. NO(x) emissions of about 20 ppmv (dry, 15 % O(2)) were achieved for ammonia in a fuel gas level of 300 ppmv and 0 % methane in the fuel gas. A preliminary 3D mathematical model of the combustor was developed using a computational fluid dynamics package.

Additional information

Authors: BRITISH COAL CORPORATION, British Coal Corporation, Coal Research Establishment, Cheltenham (GB)
Bibliographic Reference: EUR 14268 EN (1992) 38 pp., MF, ECU 4, blow-up copy ECU 6
Availability: (2)
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