Ignition delay times of n-butane and i-butane under O2/CO2 atmospheres: Shock tube experiments and kinetic model

Peng, Chao; Zou, Chun; Xia, Wenxiang; Lin, Qianjin; Luo, Jian; Shi, Haiyang; Lu, Lixin; Wang, Shusen

doi:10.1016/j.combustflame.2021.111646

Cited by 9 publications

(3 citation statements)

References 43 publications

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“…Liu et al , developed the Oxymech model based on the Aramco 2.0 model, which predicts well the IDT data of methane and ethane in a CO 2 and N 2 atmosphere. The model was further improved and extended for modeling propane and butane combustion by Xia et al and Peng et al . This up-to-date Oxymech 2.0 plus model was selected as the initial model.…”

Section: Initial Model and Modeling Approachmentioning

confidence: 99%

“…As a result, they developed the Oxymech model , based on the Aramco model, which accurately predicted the IDT data of methane and ethane in CO 2 and N 2 dilution. Xia et al and Peng et al subsequently extended this model to propane and butane named as Oxymech 2.0 plus. However, despite a reasonable reproduction of CH 4 IDT and laminar flame speed (LFS) by existing mainstream CH 4 models, it is surprisingly found that these models produce noticeably larger prediction errors for syngas (i.e., mixture of H 2 /CO) IDT data compared to existing syngas models, as shown in Section .…”

Section: Introductionmentioning

confidence: 99%

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An Optimized Methane Reaction Model for Oxyfuel Combustion

et al. 2023

Energy Fuels

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Pressurized oxyfuel combustion technology is a potential solution for reducing greenhouse gas emissions by carbon capture and storage while burning hydrocarbon fuels. Numerous experiments on CH4 ignition delay times and laminar flame propagation velocities at high pressures and CO2 atmosphere dilution have been reported, contributing to the improvement of current CH4 combustion kinetic models. However, existing mainstream models produce significantly larger prediction errors for syngas ignition delay time data, especially under oxyfuel combustion conditions. Motivated by the observation, an optimized CH4 model was developed based on a comprehensive set of experimental data, including 2205 ignition delay time, 3344 laminar flame speed, and 200 species profile measurements and balanced the predicted performance of the syngas. A novel sampling strategy was developed and embedded in the optimization algorithm to improve the computational efficiency. The optimized rate constants fall reasonably within the estimated uncertainty range. Prediction performance of the optimized model was evaluated and compared to four well-established models. The optimized model showed considerably improved results, providing a better balance between the prediction of ignition delay time and laminar flame speed data. The kinetic reasons for the improved performance were examined and discussed.

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Section: Initial Model and Modeling Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Optimized Methane Reaction Model for Oxyfuel Combustion

et al. 2023

Energy Fuels

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“…Additionally, Chen et al [34] studied the diesel combustion process through optical engine experiments, and the results showed that the engine power loss was minimized and the IDT was shortened obviously in the 50% CO 2 /50% O 2 atmosphere. Peng et al [35] compared the autoignition delay of butane in CO 2 /O 2 and air atmosphere by HPST experiment and analyzed the equivalence ratio and CO 2 effect on the IDT. Subsequently, Zhao et al [36] studied the ignition characteristics of n-heptane by the visualization platform experiment of CVCC, and the results showed that the IDT in 35% CO 2 /65% O 2 atmosphere was significantly shortened by 50% than that in air.…”

Section: Introductionmentioning

confidence: 99%

Effects of High-Concentration CO2 on Ignition Delay Time of 70% n-Heptane/30% Toluene Mixtures

et al. 2022

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In order to research the high-concentration CO2 effects on ignition delay time (IDT) of diesel surrogate fuel (70% n-heptane/30% toluene), a carbon dioxide effect (CDE) model is established, which considers fuel and ambient gas concentration, density, and temperature influence on autoignition under CO2/O2 atmosphere. Firstly, a chemical model of n-heptane/toluene is established, and the coupling, reduction, and simulation processes are carried out in chemical kinetic software with the IDT as the target parameter. Secondly, a constant volume combustion chamber (CVCC) visualization platform is built by incorporating a high-speed camera system and different working conditions are set in the CO2 volume fraction range (40%-70%) at 3.0 MPa and 850 K for an autoignition experiment. Thirdly, experiment and simulation results are discussed in air, 60% CO2/40% O2, 50% CO2/50% O2, and 40% CO2/60% O2 atmospheres, including the IDT, CO2 effects, temperature sensitivity, and OH radical rate of production (ROP). The results show that the CDE model well predicts the 70% n-heptane/30% toluene IDT under the CO2/O2 atmosphere and the average error in 60% CO2/40% O2 atmosphere is 5.29%. Besides, when the CO2 volume fraction increases from 40% to 60%, the CO2 thermal effect plays a leading role in the IDT prolongation and the OH radical ROP peak of R4 (O+H2O⟶2OH) decreases by 180%.

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Shock tube experiments and numerical study on ignition delay times of ethane in super lean and ultra-lean combustion

Zou

Xia

et al. 2022

Combustion and Flame

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Ignition delay times of n-butane and i-butane under O2/CO2 atmospheres: Shock tube experiments and kinetic model

Cited by 9 publications

References 43 publications

An Optimized Methane Reaction Model for Oxyfuel Combustion

An Optimized Methane Reaction Model for Oxyfuel Combustion

Effects of High-Concentration CO2 on Ignition Delay Time of 70% n-Heptane/30% Toluene Mixtures

Shock tube experiments and numerical study on ignition delay times of ethane in super lean and ultra-lean combustion

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