An assessment of chemical kinetics for bio-syngas combustion
An assessment of chemical kinetics for bio-syngas combustion
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DOI：
10.1016/j.fuel.2014.07.081
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发表时间：
2014-12-01
期刊：
影响因子：
7.4
通讯作者：
Jiang, X.
中科院分区：
文献类型：
--
作者：
Fischer, M.;Jiang, X.
本工作致力于评估生物合成气燃烧的化学动力学模型。为此目的考虑了三种反应机理(天然气研究所-机理GRI 3.0、其骨架版本DRM22和Hegkets的C-1-C-4机理)以及与生物合成气燃烧有关的一系列点火延迟测量。对于甲烷加氢量小得多和不加氢量少的实验，测量结果通常被黑格斯机制高估了，但被GRI和DRM机制低估了。还模拟了涉及生物合成气成分的各种混合的实验。高压和温度与低压和温度的强烈差异可能与五个反应有关，这些反应只在这些条件下才会产生影响，其中四个涉及HO2。利用GRI机理，数值研究了生物合成气组成的变化对燃烧的影响。在全球范围内，人们发现任何一种成分的增加都会伴随着更多的CO释放。点火延迟期随着初始浓度的增加而缩短或保持不变，除非甲烷的初始浓度增加。这一结果与其他地方的实验观测结果很好地吻合。(C)2014爱思唯尔有限公司。保留所有权利。
The present work was devoted to assess the chemical kinetic modelling of bio-syngas combustion. Three reaction mechanisms (the Gas Research Institute-mechanism GRI 3.0, its skeletal version DRM22 and Heghes' C-1-C-4 mechanism) were considered for that purpose along with series of ignition delay measurements relevant to the burning of bio-syngas. For experiments involving methane with and without considerably smaller quantities of added hydrogen, the measurements are generally overpredicted by Heghes' mechanism but underpredicted by the GRI and DRM mechanisms. Experiments involving various blends of the bio-syngas constituents were also simulated. The strong discrepancies present for high pressures and temperatures and low pressures and temperatures could be correlated to five reactions which are only influential under those conditions, four of which involving HO2. The effects of variations in the bio-syngas composition on combustion were numerically investigated by using the GRI-mechanism. Globally it was found that an increase in any of the constituents goes hand in hand with higher amount of CO released. The ignition delay is either shortened or left unchanged as the initial concentration is increased except in the case of methane where it is raised. The results were in good agreement with experimental observations made elsewhere. (C) 2014 Elsevier Ltd. All rights reserved.