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A Fundamental Investigation of Gas/Solid Heat and Mass Transfer in Structured Catalysts Based on Periodic Open Cellular Structures (POCS)
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2021-06-15 , DOI: 10.1021/acs.iecr.1c00215
Claudio Ferroni 1 , Mauro Bracconi 1 , Matteo Ambrosetti 1 , Matteo Maestri 1 , Gianpiero Groppi 1 , Enrico Tronconi 1
Affiliation  

In this work, we investigate the gas–solid heat and mass transfer in catalytically activated periodic open cellular structures, which are considered a promising solution for intensification of catalytic processes limited by external transport, aiming at the derivation of suitable correlations. Computational fluid dynamics is employed to investigate the Tetrakaidekahedral and Diamond lattice structures. The influence of the morphological features and flow conditions on the external transport properties is assessed. The strut diameter is an adequate characteristic length for the formulation of heat and mass transfer correlations; accordingly, a power-law dependence of the Sherwood number to the Reynolds number between 0.33 and 0.67 was found according to the flow regimes in the range 1–128 of the Reynolds number. An additional −1.5-order dependence on the porosity is found. The formulated correlations are in good agreement with the simulation results and allow for the accurate evaluation of the external transfer coefficients for POCS.

中文翻译:

基于周期性开孔结构 (POCS) 的结构化催化剂中气体/固体传热和传质的基础研究

在这项工作中,我们研究了催化活化的周期性开放细胞结构中的气固传热和传质,这被认为是强化受外部传输限制的催化过程的有前途的解决方案,旨在推导合适的相关性。计算流体动力学被用来研究 Tetrakaidekahedral 和 Diamond 晶格结构。评估形态特征和流动条件对外部传输特性的影响。支柱直径是用于制定传热和传质相关性的足够特征长度;因此,根据雷诺数 1-128 范围内的流态,发现了舍伍德数与雷诺数之间的幂律依赖性在 0.33 和 0.67 之间。额外的 -1。发现了对孔隙率的 5 阶依赖性。公式化的相关性与模拟结果非常一致,可以准确评估 POCS 的外部传递系数。
更新日期:2021-07-28
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