Abstract
The development of processes with near-zero emissions such as MILD, flameless, and OXY-fuel combustion are of great interest in various energy scenarios. The assessment and design of new burners to meet energy demands and pollution reduction strongly depends on an accurate description of the chemistry involved in the combustion process. The main outcome of this study is the collection and review of a vast amount of experimental data on MILD and OXY-fuel combustion of methane that have been reported in recent years, together with a thorough kinetic analysis to identify aspects of the mechanism that requires further revision. The CRECK core model presented here is developed upon the Aramco 2.0 mechanism [1], and further extends the validation objectives to MILD and OXY fuel combustion conditions. The aim of this work is not only the mechanism validation but also a better understanding of the combustion characteristics and critical reaction pathways in MILD, flameless, and OXY-fuel combustion.
Highlights
The modern world depends heavily on energy generation in all its forms, and daily activities require a mix of thermal, mechanical and chemical energy
Despite its lower carbon density compared to other fossil fuels, its consumption demand is growing steadily by 1.6% in recent years, and its overall usage is expected to grow of 45% within 2040 [4]
These experiments of Moderate or Intense Low oxygen Dilution (MILD) and OXY-fuel combustion are divided into four different categories including jet-stirred reactor (JSR), plug flow reactor (PFR), flame speeds and ignition delay times
Summary
The modern world depends heavily on energy generation in all its forms, and daily activities require a mix of thermal, mechanical and chemical energy. The long-term solution for decreasing combustion-generated pollution would require a larger reduction than that achieved only by efficiency improvements For this reason, the development of industrial burners with Low or near-zero emissions such as those of interest for MILD (Moderate or Intense Low Oxygen Dilution) [6], FC (Flameless combustion) [7,8], HiTAC (High Temperature Air Combustion) [9], HiCOT (High Temperature Combustion Technology) [10], CDC (Colourless Distributed Combustion) [11], LTC (Low Temperature Combustion) [12], ULC (Ultra lean combustion) [13], and OXY-fuel combustion [14] has attracted a keen interest in energy policy. Conclusions from the present analysis are reported in the last Section
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