Combustion of methane lean mixtures in reverse flow reactors: Comparison between packed and structured catalyst beds
Combustion of methane lean mixtures in reverse flow reactors: Comparison between packed and structured catalyst beds
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DOI：
10.1016/j.cattod.2005.06.003
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发表时间：
2005-08
期刊：
影响因子：
5.3
通讯作者：
P. Marín;M. G. Hevia;S. Ordóñez;F. Díez
中科院分区：
文献类型：
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作者：
P. Marín;M. G. Hevia;S. Ordóñez;F. Díez
这项工作的范围是系统地比较颗粒床和整体床在催化逆流反应器中的性能，用于燃烧稀甲烷/空气混合物，使用铝负载钯作为催化剂。采用不同的气面速度（0.1 ~ 0.3m/s）、颗粒床直径（3 ~ 6mm）、结构床密度（200 ~ 400 cpsi）和催化剂/惰性比（0.4 ~ 1）数值模拟了3500ppm甲烷在两种逆流反应器中的燃烧过程。建立了一个非定常一维非均匀模型，并用MATLAB程序进行了求解。所使用的模型、物理参数和输运特性已经在之前的实验中得到了验证，该实验是在颗粒床逆流反应器上进行的。结果表明，采用催化剂颗粒床时，反应器的稳定性较好，但与整体床的差异随着表面速度的增加而减小。相比之下，颗粒床的压降更高。
The scope of this work is to compare systematically the performance of particle beds and monolithic beds in catalytic reverse flow reactors used for combustion of lean methane/air mixtures, using alumina-supported palladium as catalyst. Different values of gas surface velocity (0.1–0.3m/s), particle diameter (3–6mm, for particle bed), cell density (200–400 cpsi, for structured bed) and catalyst/inert ratio (0.4–1) were used for the simulation of the combustion of 3500ppm methane in both kinds of reverse flow reactor. An unsteady one-dimensional heterogeneous model has been developed and solved using a MATLAB code. The model, physical parameters and transport properties used had been experimentally validated in a previous work, operating with a particle bed reverse flow reactor. Results obtained indicate that the reverse flow reactor is more stable when the catalyst particle beds are use, although the difference with the monolith bed decreases as surface velocity increases. In contrast, pressure drops in the bed are higher for the particle bed.