Feasibility of biogas and oxy-fuel combustion in steam cracking furnaces: Experimental and computational study
Feasibility of biogas and oxy-fuel combustion in steam cracking furnaces: Experimental and computational study
复制标题
蒸汽裂解炉中沼气和全氧燃料燃烧的可行性：实验和计算研究
DOI：
10.1016/j.fuel.2021.121393
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发表时间：
2021-11
期刊：
影响因子：
7.4
通讯作者：
Van Geem Kevin M.
中科院分区：
文献类型：
--
作者：
Zhang Yu;Vangaever Stijn;Theis Gilles;Henneke Mike;Heynderickx Geraldine J.;Van Geem Kevin M.
这项工作评估了蒸汽裂解炉中沼气空气燃料燃烧和天然气富氧燃料的可行性。对纯天然气、20%CO2、40%CO2稀释天然气和天然气富氧燃烧四种情况进行了实验和数值研究。 John Zink Hamworthy 燃烧试验炉代表蒸汽裂解炉的一部分，用于实验研究。还开发了三维稳态CFD模型来模拟试验炉。空气-燃料燃烧场景的模拟结果与实验数据吻合较好，炉温最大和平均相对误差分别为3.86%和1.78%。在实验和模拟中都观察到火焰长度随着燃料中 CO2 摩尔分数的增加而减少。结果表明，CO2 稀释对整体热流分布影响较小，有利于现有炉子的改造。另一方面，使用默认 EDC 模型的氧燃料燃烧模拟预测了显着的火焰升空和入射辐射热通量向更高高度的转移，而这在实验中未观察到。这主要归因于富含CO2和H2O的燃烧环境中反应速率降低。调整 EDC 模型参数有助于使仿真结果与实验数据之间取得更好的一致性，而额外的实验室规模实验对于进一步验证数值模型至关重要。此外，研究氧燃料燃烧情况下 O2 的最佳摩尔分数特别有意义。
This work evaluates the feasibility of biogas air-fuel combustion and natural gas oxy-fuel in steam cracking furnaces. Four cases, namely air-fuel combustion of pure natural gas, 20% CO2, 40% CO2diluted natural gas, and oxy-fuel combustion of natural gas are investigated both experimentally and numerically. The John Zink Hamworthy Combustion test furnace, representing a section of a steam cracking furnace, is used for experimental studies. A three-dimensional steady-state CFD model is also developed to simulate the test furnace. The simulation results of the air-fuel combustion scenarios are in good agreement with the experimental data, with the maximum and average relative errors of furnace temperature of 3.86% and 1.78%, respectively. The reduction of flame length with increasing CO2mole fraction in the fuel is observed in both experiments and simulations. It is shown that CO2dilution has minor effect on the overall heat flux profile, which is beneficial for retrofitting existing furnaces. On the other hand, the oxy-fuel combustion simulation using default EDC model predicts a significant flame lift-off and incident radiative heat flux shift towards the higher elevations which was not observed in the experiments. This can be mainly attributed to the reduced reaction rate in a CO2and H2O enriched combustion environment. Adjusting the EDC model parameters helps to achieve better agreement between simulation results and experimental data, while additional lab-scale experiments are essential for further validation of the numerical model. Moreover, it is of particular interest to study the optimal mole fraction of O2 in oxy-fuel combustion scenario.
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影响因子：
9
作者：
P. Gładysz;A. Ziȩbik
通讯作者：
P. Gładysz;A. Ziȩbik
DOI：
10.1016/j.proci.2008.06.048
发表时间：
2009
影响因子：
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作者：
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影响因子：
4.4
作者：
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影响因子：
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作者：
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DOI：
10.1016/c2010-0-65874-3
发表时间：
1993
期刊：
--
影响因子：
--
作者：
M. Modest
通讯作者：
M. Modest