The objective of the present study is to develop algorithms that can reduce automatically big detailed kinetic mechanisms to the smallest possible size quickly, efficiently, and accurately. The new algorithms developed host the Directed-Relation Graph-Generations based method, DRG-G. For further mechanism simplification, sensitivity analysis and unimportantreaction elimination were implemented. In the present work, an n-heptane mechanism comprising 561 species was reduced for temperatures in the range from 600 to 1800 K, pressures in the range from 1 to 50 atm, and equivalence ratios in the range from 0.5 to 1.5. The validation of the reduction was carried with respect to ignition-delay time. The mechanism was successfully reduced to 93 species and 295 reactions. Very good agreement between numerical results obtained with the skeletal and detailed mechanism, respectively, could be achieved.
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