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Received July 21, 2008
Accepted November 16, 2008
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Copyright © KIChE. All rights reserved.
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Effects of nitrogen dilution for coal synthetic gas fuel on the flame stability and NOx formation
Department of Mechanical Engineering, Suwon University, Suwon PO Box 77, Suwon, Gyeonggi-do 445-743, Korea
clee@suwon.ac.kr
Korean Journal of Chemical Engineering, May 2009, 26(3), 862-866(5), 10.1007/s11814-009-0144-4
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Abstract
Experimental studies were conducted to investigate the flame stability and the thermal/fuel NOx formation characteristics of the low calorific value (LCV) coal derived gas fuel. Synthetic LCV fuel gas was produced by mixing carbon monoxide, hydrogen and ammonia on the basis that the thermal input of the syngas fuel into a burner is identical to that of natural gas. The syngas mixture was fed to and burnt on flat flame burner. With the variation of the equivalence ratio for specific syngas fuel, flame behaviors were observed to identify the flame instability due to blow-off or flash-back and to define stable combustion range. Measurements of NOx content in exhaust gas were made to compare the thermal and the fuel NOx emissions from the LCV syngas combustion with those of the natural gas. In addition, the nitrogen dilution of the LCV syngas was attempted as an NOx reduction technique, and its effects on NOx emission and flame stability were investigated.
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