针对生物质制取合成气燃料制备和应用过程中CO2掺混的影响,对合成气/空气/CO2预混火焰中开展数值模拟,通过不同的辐射模型研究辐射再吸收对火焰传播速度的影响。结果表明,辐射再吸收提高了火焰传播速度,最大提升幅度可达11.15%。随当量比增加,辐射再吸收对火焰传播速度的提升幅度从11.15%减小至3.12%,受预热导致的化学效应控制。H自由基在贫燃工况占据主导地位,辐射再吸收通过反应H+O2==O+OH影响火焰传播速度;而富燃工况下,与OH自由基相关的反应H+OH+M==H2O+M是辐射再吸收影响火焰传播速度的主导反应。
Abstract
Aiming at the effect of CO2 mixing in the preparation and application of syngas fuel from biomass, numerical simulations are conducted in syngas/air/CO2 flame, the effect of radiation reabsorption on laminar flame speed is studied by different radiation models. Results show that the radiation reabsorption increase the flame speed of syngas/air/CO2 mixtures, the relative increment is up to 11.15%. With the increase of equivalence ratio, the increase of flame speed induced by radiation reabsorption effect decrease from 11.15% to 3.12%, which is controlled by the preheat-induced chemical effect. H radicals play the dominant role in the fuel-lean conditions, and the radiation reabsorption effect affects the flame speed through the reaction H+O2==O+OH, while at the fuel-rich conditions, the reaction H+OH+M==H2O+M related to OH radicals is the dominant reaction.
关键词
合成气 /
H2/CO /
辐射 /
二氧化碳 /
火焰传播速度
Key words
syngas /
H2/CO /
radiation /
carbon dioxide /
flame speed
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 姬登祥, 金科, 黄加艳, 等碳酸盐中CO2气化生物质制合成气[J]. 太阳能学报, 2021, 42(1): 360-364.
JI D X, JIN K, HUANG J Y, et al.Syngas production from CO2 gasification biomass in carbonate salts[J]. Acta energiae solaris sinica, 2021, 42(1): 360-364.
[2] 应浩, 涂军令, 江俊飞, 等. 木屑高温水蒸气气化制备合成气研究[J]. 太阳能学报, 2014, 35(3): 379-383.
YING H, TU J L, JIANG J F, et al.Production of synthesis gas by high temperature steam gasification of sawdust[J]. Acta energiae solaris sinica, 2014, 35(3): 379-383.
[3] 宁思云, 应浩, 徐卫, 等. 木屑炭水蒸气催化气化制取合成气研究[J]. 太阳能学报, 2020, 41(2): 20-26.
NING S Y, YING H, XU W, et al.Catalytic steam gasification of sawdust-char for syngas[J]. Acta energiae solaris sinica, 2020, 41(2): 20-26.
[4] 王克, 张世红, 付哲, 等. 垃圾炉排焚烧炉的富氧燃烧改造数值模拟研究[J]. 太阳能学报, 2016, 37(9): 2257-2264.
WANG K, ZHANG S H, FU Z, et al.Numerical simulation research for the oxyfuel combustion renovation of a msw grate incinerator[J]. Acta energiae solaris sinica, 2016, 37(9): 2257-2264.
[5] 朱成成, 邢献军, 陈泽宇, 等. O2/CO2/N2气氛下玉米秸秆混煤燃烧特性及动力学分析[J]. 太阳能学报, 2021, 42(1): 385-391.
ZHU C C, XING X J, CHEN Z Y, et al.Combustion characteristics and kinetic analysis of corn straw and coal co-combustion in O2/CO2/N2 atmosphere[J]. Acta energiae solaris sinica, 2021, 42(1): 385-391.
[6] LI W Y, ZOU C, YAO H, et al.An optimized kinetic model for H2/CO combustion in CO2 diluent at elevated pressures[J]. Combustion and flame, 2022, 241: 112093
[7] ZHENG S, LIU H, SUI R, et al.Effects of radiation reabsorption on laminar NH3/H2/air flames[J]. Combustion and flame, 2022, 235: 111699.
[8] GORDON I E, ROTHMAN L S, HILL C, et al.The HITRAN2016 molecular spectroscopic database[J]. Journal of quantitative spectroscopy and radiative transfer, 2017, 203: 3-69.
[9] ZHENG S, SUI R, LIANG W, et al.On band lumping, radiation reabsorption, and high-pressure effects in laminar flame propagation[J]. Combustion and flame, 2020, 221: 86-93.
[10] LIU F, GÜLDER Ö L, SMALLWOOD G J, et al. Non-grey gas radiative transfer analyses using the statistical narrow-band model[J]. International journal of heat and mass transfer, 1998, 41(14): 2227-2236.
[11] MARAKIS J G.Application of narrow and wide band models for radiative transfer in planar media[J]. International journal of heat and mass transfer, 2001, 44(1): 131-142.
[12] ZHENG S, LIU H, LI D K, et al.Effects of radiation reabsorption on the laminar burning velocity of methane/air and methane/hydrogen/air flames at elevated pressures[J]. Fuel, 2022, 311: 122586.
[13] NATARAJAN J, NANDULA S, LIEUWEN T, et al.Laminar flame speeds of synthetic gas fuel mixtures[C]//Turbo Expo 2005. Reno, Nevada, USA. 2005.
[14] BURBANO H J, PAREJA J, AMELL A A.Laminar burning velocities and flame stability analysis of H2/CO/air mixtures with dilution of N2 and CO2[J]. International journal of hydrogen energy, 2011, 36(4): 3232-3242.
[15] JU Y, MASUYA G, RONNEY P D.Effects of radiative emission and absorption on the propagation and extinction of premixed gas flames[J]. Symposium (international) on combustion, 1998, 27(2): 2619-2626.
基金
国家自然科学基金（52276185; 52276189）; 中央高校基本科研业务费资助项目（2020JG005; 2020DF01）
PDF(1872 KB)
