Jiayi Lin , Zhongqian Ling , Jiamin Li , Dingkun Yuan , Xianyang Zeng , Jiangrong Xu , Xinlu Han
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引用次数: 0
Abstract
With increasing focus on clean energy, the combustion characteristics of methane, especially its laminar burning velocity, have garnered significant attention. This study presents a numerical investigation of the laminar burning velocity of methane/air mixtures incorporating various additives, using three different models. In addition to the laminar burning velocity, peak mole fractions of O, OH, and CH3 at their maximum concentrations were analyzed, along with a sensitivity analysis conducted under the maximum temperature gradients. The results indicate that the behavior of methane flames varies with the addition of different gases. The addition of H2 leads to a nearly linear increase in laminar burning velocity, accompanied by a slight rise in the mole concentrations of H and OH, while the concentration of CH3 remains nearly unchanged. However, the addition of CO2 and H2O results in a decrease in laminar burning velocity, radical mole concentrations, and flame temperature. Furthermore, the impact of overall activation energy and overall activation order on the laminar burning velocity of the global one-step reaction is also discussed in detail. In summary, the addition of H2 does not significantly affect either the overall activation energy or overall activation order, whereas CO2 and H2O contribute to reductions in both parameters. These findings could be beneficial to practical applications, including Exhaust Gas Recirculation (EGR) and Carbon Capture Utilization Storage (CCUS).
期刊介绍:
The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include:
Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies
Emissions and environmental pollution control; safety and hazards;
Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS;
Petroleum engineering and fuel quality, including storage and transport
Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling
Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems
Energy storage
The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.