Reaction Mechanism Reduction for Ozone-Enhanced CH 4 /Air Combustion by a Combination of Directed Relation Graph with Error Propagation, Sensitivity Analysis and Quasi-Steady State Assumption

Yingzu Liu, Zhihua Wang, Liang Li, Kaidi Wan and Kefa Cen
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Yingzu Liu: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Zhihua Wang: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Liang Li: School of Engineering and Technology, University of Hertfordshire, Herts AL10 9AB, UK
Kaidi Wan: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Kefa Cen: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Energies, 2018, vol. 11, issue 6, 1-12

Abstract: In this study, an 18-steps, 22-species reduced global mechanism for ozone-enhanced CH 4 /air combustion processes was derived by coupling GRI-Mech 3.0 and a sub-mechanism for ozone decomposition. Three methods, namely, direct relation graphics with error propagation, (DRGRP), sensitivity analysis (SA), and quasi-steady-state assumption (QSSA), were used to downsize the detailed mechanism to the global mechanism. The verification of the accuracy of the skeletal mechanism in predicting the laminar flame speeds and distribution of the critical components showed that that the major species and the laminar flame speeds are well predicted by the skeletal mechanism. However, the pollutant NO was predicated inaccurately due to the precursors for generating NO were removed as redundant components. The laminar flame speeds calculated by the global mechanism fit the experimental data well. The comparisons of simulated results between the detailed mechanism and global mechanism were investigated and showed that the global mechanism could accurately predict the major and intermediate species and significantly reduced the time cost by 72%.

Keywords: mechanism reduction; ozone-enhanced; skeletal mechanism; global mechanism (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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