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首页> 外文期刊>Catalysis Today >Methane Dry Reforming over Ni/Al2O3 Catalyst in Spark Plasma Reactor: Linking Computational Fluid Dynamics (CFD) with Reaction Kinetic Modelling
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Methane Dry Reforming over Ni/Al2O3 Catalyst in Spark Plasma Reactor: Linking Computational Fluid Dynamics (CFD) with Reaction Kinetic Modelling

机译：火花等离子体反应器中Ni / Al2O3催化剂上的甲烷干重整：将计算流体动力学（CFD）与反应动力学建模连接

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摘要

Efficient processes are needed for the valorisation of major greenhouse gases, methane and carbon dioxide, and electrification and energy storage are highly desired as well. Plasma based dry reforming provides the answer in all areas, as fast switch-on and-off times could use excess grid electricity to produce valuable products and decrease the carbon footprint. The reaction was studied in a non-equilibrium atmospheric pressure spark discharge reactor, which achieves higher yields than DBD reactors. CH4 and CO2 feed mixture at different ratios was converted to H-2 and CO with high selectivity, achieving conversions of 85% for CH4 and 75% for CO2. The syngas production energy cost was 315 kJ/mol, indicating 20% of input energy transferred to chemical energy. CO2 plasma regeneration and cyclic reaction operation was proposed to tackle the coking problem. With the intent of improving the yield, gaseous plasma was coupled with a solid Ni/Al2O3 heterogeneous catalyst, wash-coated on porous alumina foam material. The effects of specific energy input, external heating temperature and gas flow rate were also screened. In addition, a CFD and chemical kinetics model was developed in order to further investigate the system, which achieved good agreement with the experiments using relatively simple chemistry.
机译：主要温室气体、甲烷和二氧化碳的定价需要高效的流程，电气化和储能也是非常需要的。基于等离子体的干式重整在所有领域都提供了答案，因为快速开关时间可能会使用多余的电网电力来生产有价值的产品并减少碳足迹。该反应在非平衡常压火花放电反应器中进行了研究，该反应器的产率高于DBD反应器。不同比例的CH4和CO2进料混合物被高选择性地转化为H-2和CO，CH4和CO2的转化率分别为85%和75%。合成气生产能源成本为315 kJ/mol，表明20%的输入能源转移到了化学能。提出了CO2等离子体再生和循环反应操作来解决结焦问题。为了提高产率，将气体等离子体与固体Ni/Al2O3多相催化剂耦合，在多孔氧化铝泡沫材料上进行洗涤涂层。还筛选了比能量输入、外部加热温度和气体流量的影响。此外，为了进一步研究该系统，开发了一个CFD和化学动力学模型，该模型与使用相对简单化学的实验结果吻合良好。

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