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首页> 外文会议>International Tropical Renewable Energy Conference >The Predicted Effects of Inlet Velocity and Reactor Size on Methane Conversion and Carbon Yield of Catalytic Decomposition of Methane in a Fluidized-Bed Reactor
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The Predicted Effects of Inlet Velocity and Reactor Size on Methane Conversion and Carbon Yield of Catalytic Decomposition of Methane in a Fluidized-Bed Reactor

机译：入口速度和反应器大小对流化床反应器中甲烷催化分解甲烷转化及碳产量的预测作用

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摘要

The effects of inlet gas velocity and reactor size on methane conversion and carbon yield of methane decomposition on a Ni-Cu-Al catalyst in a fluidized-bed reactor was investigated in this research. Phenomenological modelling and simulation of the reactor were performed to achieve the objective. The axisymmetric 2D model of the reactor comprises gas- and solid-phase mass balances, energy balance and momentum balance. Axial and radial dispersion concepts in gas and solid phases are applied on the description of the non-ideal flow pattern in the reactor. Solid-phase dispersion takes into account aggregation as the result of the carbon nanotubes growth on the catalyst surface. Simulation results exhibit that when the inlet velocity escalates from 0.017 m/s to 0.030 m/s, the methane conversion rises from 77% to 90%, and the carbon nanotube yield increases from 0.68 g/g catalyst to 1.5 g/g catalyst. The methane conversion in the reactor with the diameter of 0.14 m is 49% and increases to 77% when the diameter enlarges twice with the constant aspect ratio of 2.82. The carbon nanotube yield decreases from 0.86 g/g catalyst to 0.66 g/g catalyst in 5-hour operation with the increase in the size.
机译：本研究研究了入口气体速度和反应器大小对甲烷分解对流化床反应器中的甲烷分解甲烷分解的影响。进行了反应器的现象学建模和模拟以实现目标。反应器的轴对称2D模型包括气体和固相质量余额，能量平衡和动量平衡。气体和固态相中的轴向和径向分散概念应用于反应器中非理想流动模式的描述。作为催化剂表面上的碳纳米管生长的结果，固相分散考虑聚集。仿真结果表明，当入口速度从0.017 m / s升高至0.030m / s时，甲烷转化率从77％升高至90％，碳纳米管产率从0.68g / g催化剂增加到1.5g / g催化剂。直径为0.14μm的反应器中的甲烷转化为49％，当直径增大两次以恒定的纵横比为2.82时，增加到77％。碳纳米管产量在5小时的5小时内从0.86g / g催化剂降低至0.66g / g催化剂，随着尺寸的增加。

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