Numerical Study on the Kinetic Effects of Hydrogen Addition on the Thermal Characteristics of Laminar Methane Diffusion Flames
-
Long Wu
,
Noriyuki Kobayashi
Abstract
The kinetic effects of H2 addition on the thermal characteristics of laminar methane diffusion flames were numerically studied using a detailed chemical kinetics consisting of 53 species and 325 reactions. The variations in the heat release properties and relevant key reactions with H2 addition were analyzed. Results show that the reactions of H + O2 + H2O ⇔ HO2 + H2O (R35), H + HO2 ⇔ OH + OH (R46), H + CH3 (+ M) ⇔ CH4 (+ M) (R52) and OH + H2 ⇔ H + H2O (R84) present important roles in the global heat release and the contributions of these reactions significantly increased as H2 is added to CH4 stream. Moreover, the increase rate of contribution of R84 with H2 addition is much larger than those of the reactions of R35, R46 and R52. The H and OH are the two most important radicals for heat release in the combustion process of CH4-H2 diffusion flame. The reaction of R84 is one of the main contributors for production of H radical and the contribution of R84 significantly increased with H2 addition, while the reaction of H + O2 ⇔ O + OH (R38) dominates the contribution of production of OH, which contributes more than 50 %, no matter whether H2 is added to CH4 stream.
Acknowledgements
The authors gratefully acknowledge the financial supports from the International Joint Research and Development Project of Tianjin Talent Introduction and Science & Technology Cooperation Plan (14RCGFGX00850), National Key R&D Program of China (2017YFD0400900) and Scientific Research Foundation for Talents, Tianjin University of Science & Technology (10286).
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Articles in the same Issue
- Review
- Modelling of Chemical Reactors: From Systemic Approach to Compartmental Modelling
- Articles
- Novel Solutions in Modeling of Anaerobic Digestion Process - Two-Phase AD Models Development and Comparison
- Characterization and Catalytic Performance of Modified SBA-16 in Liquid Phase Reaction
- Production of NMSBA from NMST Catalyzed by Co/Mn/Br and HPW@C Modified with ZnCl2 Solution
- Numerical Study on the Kinetic Effects of Hydrogen Addition on the Thermal Characteristics of Laminar Methane Diffusion Flames
- Transient Flow and Heat Transfer Characteristics of non-Newtonian Supercritical Third-Grade Fluid (CO2) past a Vertical Cylinder
- Synthesis of MgO/TiO2 Nanocomposite and Its Application in Photocatalytic Dye Degradation
- A Comparative CFD Study on Gas-Liquid Dispersion in A Stirred Tank with Low and High Gas Loadings
- Scrutinization of Chemical Reaction Effect on Flow and Mass Transfer of Prandtl Liquid over a Riga Plate in the Presence of Solutal Slip Effect
- Short Communications
- Edible Plant Oil Wastewater Treatment Using Electro-Fenton Technique: Experiment and Correlation
