Laminar flame speeds and kinetic modeling of n-pentanol and its isomers (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Laminar flame speeds and kinetic modeling of n-pentanol and its isomers (PDF)
- 发表刊物：
- Energy Fuels
- 摘要：
- A comprehensive experimental and computational study was conducted on the laminar combustion characteristics and chemical kinetics of four pentanol isomer-air mixtures (n-pentanol, 3-methyl-1-butanol, 2-methyl-1-butanol and 2-methyl-2-butanol). Experiments were performed at the equivalence ratios ranging from 0.6 to 1.8, three initial temperatures (393, 433, and 473 K) and four pressures (0.1, 0.25, 0.5, and 0.75 MPa) using outwardly propagating flames. Results show that the laminar flame speeds of the four pentanol isomers decrease in the order of n-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol and 2-methyl-2-butanol. The most significant difference among the isomers are observed around the stoichiometric mixture. Simulations on the laminar flame speeds of n-pentanol and 3-methyl-1-butanol were respectively performed using the model of Heufer et al. and Sarathy et al. Comparisons between the simulations and experimental data show n-pentanol model yields satisfactory agreement with the data at most conditions but slight over-predictions at rich mixtures and atmospheric pressure, and 3-methyl-1-butanol model yields close agreement with the data at all conditions. For 2-methyl-1-butanol, a model based on the model proposed by Tang et al. was developed and validated against the data of laminar flame speed as well as ignition delay times. Sensitivity analysis indicates that the laminar flame speeds of the isomer-air flames (n-pentanol, 3-methyl-1-butanol and 2-methyl-1-butanol) are mainly sensitive to small molecule reactions involving H2-O2 and C1-C3 species, but not to fuel-specific reactions. The concentrations of H2-O2 and C1-C3 intermediates are responsible for the laminar flame speed difference among the isomers. Additionally, butene isomers working as the important intermediates occupy different fractions in various pentanol isomer flames, confirming the differences on the chemical structure and the reaction pathways of the isomers.
- 合写作者：
- Li QQ, Tang CL, Cheng Y, Guan L, Huang ZH
- 卷号：
- 2015, 29(8): 5334-5348
- 页面范围：
- 5334-5348
- 是否译文：
- 否
- 发表时间：
- 2015-08-20