A CFD study on the effect of the characteristic dimension of catalytic wall microreactors

被引：27

作者：

Arzamendi, G. ^{[1
]}

Uriz, I. ^{[1
]}

Navajas, A. ^{[1
]}

Dieguez, P. M. ^{[1
]}

Gandia, L. M. ^{[1
]}

Montes, M. ^{[2
]}

Centeno, M. A. ^{[3
]}

Odriozola, J. A. ^{[3
]}

机构：

[1] Univ Publ Navarra, Dept Quim Aplicada, E-31006 Pamplona, Spain

[2] Univ Basque Country, Fac Ciencias Quim San Sebastian, Dept Quim Aplicada, Grp Ingn Quim, San Sebastian 20018, Spain

[3] Univ Seville, Ctr Mixto CSIC, Inst Ciencia Mat Sevilla, Seville 41092, Spain

来源：

AICHE JOURNAL | 2012年 / 58卷 / 09期

关键词：

catalytic wall microreactor; computational fluid dynamics; methane steam reforming; microchannel reactor; microreactor; MICROCHANNEL REACTOR; SYNGAS PRODUCTION; METHANE; COMBUSTION; INTENSIFICATION; LIMITATIONS; TECHNOLOGY; GENERATION; TRANSPORT; HYDROGEN;

D O I：

10.1002/aic.12790

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A three-dimensional computational fluid dynamics study of the steam methane reforming (SMR) in microreactors is presented. Emphasis has been made on investigating the effects of the characteristic dimension (d: 0.35, 0.70, 1.40, and 2.80 mm) on the performance of two microreactor geometries: square microchannels and microslits. Results have shown that for both geometries the SMR conversion decreases markedly as d increases. Conversely, the microchannels provide a methane conversion slightly higher than that of the microslits. The different performance of the microreactors is only partially due to the different surface-to-volume ratio. Pronounced transverse temperature and concentration gradients develop as the characteristic dimension increases especially for microslits in the first half of the reactor. Therefore, external transport limitations can affect the performance of microreactors for SMR, although the characteristic dimensions are of the order of very few millimeters. (c) 2011 American Institute of Chemical Engineers AIChE J, 2012

引用

页码：2785 / 2797

页数：13

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