How does the presence of CO2 affect the combustion of natural gas?
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The presence of CO2 affects the combustion of natural gas in several ways. Firstly, CO2 dilution in the oxidizer mixture reduces the flame temperature, resulting in a decrease in thermal efficiency . Additionally, CO2 addition can lead to a reduction in NOx concentrations, which is beneficial for reducing emissions . However, the introduction of CO2 can also increase the concentration of CO in the combustion chamber . Furthermore, the addition of CO2 to natural gas can decrease power output and thermal efficiency, leading to higher fuel consumption . The increased heat capacity of the mixture due to CO2 addition can also result in higher total hydrocarbon (THC) emissions and increased methane portion of the THC emissions . Overall, the presence of CO2 in natural gas combustion has both positive and negative effects on combustion performance and emissions.
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| Papers (5) | Insight |
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32 Citations | The presence of CO2 in natural gas-hydrogen blends reduces the thermal efficiency and increases total hydrocarbon emissions and the methane portion of the emissions. |
10 Citations | The presence of CO2 in natural gas combustion decreases power output and brake mean effective pressure (BMEP), leading to higher fuel consumption and lower thermal efficiency. |
3 Citations | The presence of CO2 in natural gas combustion decreases the flame temperature, with a more significant effect on the oxidizer side. The paper discusses the effects of CO2 on flame characteristics in a counterflow diffusion flame. |
Open access•Journal Article | The presence of CO2 in natural gas combustion reduces NOx concentrations, but the effect on CO concentrations depends on the amount and distribution of CO2 added, as well as the excess air ratio. |
14 Citations | The presence of CO2 in the combustion of natural gas closes the gap between maximum and exhaust temperatures and affects the formation of CO through chain-branching and chain-terminating reactions. |
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