Recent testing of exhaust emissions from large bore natural gas engines has indicated that formaldehyde is present in amounts that are significant relative to hazardous air pollutant standards. In consequence, a detailed literature review has been carried out at Colorado State University to assess the current state of knowledge about formaldehyde formation mechanisms and evaluate its applicability to gas engines. In this paper the following topics from that review, which bear directly on formaldehyde formation in natural gas engines, are discussed: (1) post combustion equilibrium concentrations; (2) chemical kinetics; (3) flame propagation and structure; (4) partial oxidation possibilities; and (5) potential paths for engine out formaldehyde. Relevant data taken from the literature on equilibrium concentrations and in-flame temperatures and concentrations are presented in graphical form. A map of possible paths for engine out formaldehyde is used to summarize results of the review, and conclusions relative to formation and destruction mechanisms are presented. [S0742-4795(00)00904-2]
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October 2000
Technical Papers—Special Ice Section
Formaldehyde Formation in Large Bore Natural Gas Engines Part 1: Formation Mechanisms
Charles E. Mitchell,
Charles E. Mitchell
Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523
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Daniel B. Olsen
Daniel B. Olsen
Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523
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Charles E. Mitchell
Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523
Daniel B. Olsen
Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523
Contributed by the Internal Combustion Engine Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division November 6, 1998; final revision received by the ASME Headquarters December 29, 1999. Technical Editor: D. Assanis.
J. Eng. Gas Turbines Power. Oct 2000, 122(4): 603-610 (8 pages)
Published Online: December 29, 1999
Article history
Received:
November 6, 1998
Revised:
December 29, 1999
Citation
Mitchell , C. E., and Olsen, D. B. (December 29, 1999). "Formaldehyde Formation in Large Bore Natural Gas Engines Part 1: Formation Mechanisms ." ASME. J. Eng. Gas Turbines Power. October 2000; 122(4): 603–610. https://doi.org/10.1115/1.1290585
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