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Numerical Study of the Effect of Hydrogen Addition on Methane–air Mixtures Combustion by Jinhua Wang; Zuohua Huang; Chenglong Tang; Haiyan Miao; Xibin Wang is a Engineering article available to read on EtoBox.

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The stoichiometric methane-hydrogen-air freely propagated laminar premixed flames at normal temperature and pressure were calculated by using PREMIX code of CHEMKIN II program with GRI-Mech 3.0 mechanism. The mole fraction profiles and the rate of production of the dominant reactions contributing to the major species and some selected intermediate species in the flames of methane-hydrogen-air were obtained. The rate of production analysis was conducted and the effect of hydrogen addition on the reactions of methane-air mixtures combustion was analyzed by the dominant elementary reactions for specific species. The results showed that the mole fractions of major species CH 4 , CO and CO 2 were decreased while their normalized values were increased as hydrogen is added. The rate of production of the dominant reactions contributing to CH 4 , CO and CO 2 shows a remarkable increase as hydrogen is added. The role of H 2 in the flame will change from an intermediate species to a reactant when hydrogen fraction in the blends exceeds 20%. The enhancement of combustion with hydrogen addition can be ascribed to the significant increase of H, O and OH in the flame as hydrogen is presented. The

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Author

Jinhua Wang; Zuohua Huang; Chenglong Tang; Haiyan Miao; Xibin Wang

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0360-3199)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)