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首页> 外文期刊>RSC Advances >Investigation of low concentration methane combustion in a fluidized bed with Pd/Al2O3 as catalytic particles
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Investigation of low concentration methane combustion in a fluidized bed with Pd/Al2O3 as catalytic particles

机译：以Pd / Al2O3为催化颗粒的流化床中低浓度甲烷燃烧的研究

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The catalytic combustion characteristics of low concentration (0.15-3 vol%) methane combustion in a labscale fluidized bed with 0.5 wt% Pd/Al2O3 as catalytic particles were studied experimentally. A mathematical model was developed according to the flow and reaction characteristics of the fluidized bed. The effects of bed temperature and inlet methane concentration on combustion were investigated and the kinetic characteristics were analyzed. The results show that methane conversion increases with increasing bed temperature, while it decreases slightly as the inlet methane concentration increases. The reaction order was evaluated as 0.608, and the activation energy was determined to be 96 185 J mol(-1) during low-concentration methane catalytic combustion in the fluidized bed. It was also found that the reaction in the fluidized bed was controlled by kinetics when the temperature was below 450 degrees C. When the temperature exceeded 450 degrees C, the reaction kinetic constant increased with increasing temperature, and the reaction was eventually controlled by kinetics, mass transfer and diffusion. A comparison of the results showed that the values calculated by the mathematical model agreed well with the experimental data.
机译：实验研究了以0.5 wt％Pd / Al2O3为催化颗粒的实验室规模流化床中低浓度（0.15-3 vol％）甲烷燃烧的催化燃烧特性。根据流化床的流动和反应特性，建立了数学模型。研究了床温和入口甲烷浓度对燃烧的影响，并分析了动力学特性。结果表明，甲烷转化率随着床温的升高而增加，但随着入口甲烷浓度的增加而略有降低。反应顺序的评估为0.608，在流化床中低浓度甲烷催化燃烧过程中，活化能确定为96 185 J mol（-1）。还发现当温度低于450℃时，流化床中的反应受动力学控制。当温度超过450℃时，反应动力学常数随温度升高而增加，并且最终受动力学控制，传质和扩散。结果比较表明，数学模型计算出的值与实验数据吻合良好。

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