Short-Channel Structured Reactor as a Catalytic Afterburner

Iwaniszyn, Marzena; Ochońska, J.; Gancarczyk, A.; Jodłowski, Przemysław J.; Knapik, A.; Łojewska, Joanna; Janowska-Renkas, Elżbieta; Kołodziej, Andrzej

doi:10.1007/s11244-013-9966-8

Cited by 13 publications

(9 citation statements)

References 11 publications

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“…Considering fluid flow, two essential assumptions can be applied for modeling, namely flow‐through a capillary and flow‐around a solid body (a sphere or a cylinder). These approaches were successfully used in the literature for others reactor fillings: flow around a sphere—for example, pneumatic transport and sedimentation of grains; flow around a cylinder—for example, fluid flow through woven screens; flow through a short capillary duct—for example, short monoliths …”

Section: Resultsmentioning

confidence: 99%

“…These approaches were successfully used in the literature for others reactor fillings: flow around a sphere-for example, pneumatic transport and sedimentation of grains 9 ; flow around a cylinder-for example, fluid flow through woven screens 10 ; flow through a short capillary duct-for example, short monoliths. 11 Let us consider the open cell solid foam structure ( Figure 1a). Two kinds of channels are clearly visible: (1) cell-large void space, approximately spherical, of diameter (and length) d c , and (2) window-very short channel connecting adjacent cells, limited by the strut, of diameter d w and the length equal to the strut diameter (thickness) d s .…”

Section: Pressure Drop Modelingmentioning

confidence: 99%

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Gas‐phase flow resistance of metal foams: Experiments and modeling

et al. 2017

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Based on experimental results of gas flow resistance through two metal foams, NC 2733 and Ni 2733, a modeling is performed to adjudicate governing flow mechanism. Two essential models are considered: developing laminar flow within short capillary channel (i.e., foam pore) and flow around solid body (foam strut modeled as cylinder or sphere), each of them of some variants. Foam geometry was studied using computer microtomography. The model of flow around a sphere (diameter equal to strut thickness) gives the best conformity with experiments. © 2017 American Institute of Chemical Engineers AIChE J, 63: 1799–1803, 2017

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Section: Resultsmentioning

confidence: 99%

Section: Pressure Drop Modelingmentioning

confidence: 99%

Gas‐phase flow resistance of metal foams: Experiments and modeling

et al. 2017

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“…These approaches were successfully applied in the literature for other reactor fillings: flow around a sphere-e.g., pneumatic transport and sedimentation of grains [17,18], flow around a cylinder-e.g., fluid flow through woven screens [19], and flow through a short capillary duct-e.g., for very short monoliths [20].…”

Section: Pressure Drop Modellingmentioning

confidence: 99%

In Search of Governing Gas Flow Mechanism through Metal Solid Foams

et al. 2017

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Solid foams have been intensely studied as promising structured catalytic internals. However, mechanisms governing flow and transport phenomena within the foam structures have not been properly addressed in the literature. The aim of this study was to consider such flow mechanisms based on our experimental results on flow resistance. Two mechanisms were considered: developing laminar flow in a short capillary channel (flow-through model), and flow around an immersed solid body, either a cylinder or sphere (flow-around model). Flow resistance experiments were performed on three aluminum foams of 10, 20, and 40 PPI (pores per inch), using a 57 mm ID test column filled with the foams studied. The foam morphology was examined using microtomography and optical microscopy to derive the geometric parameters applied in the model equations. The flow-through model provided an accuracy of 25% for the experiments. The model channel diameter was the foam cell diameter, and the channel length was the strut thickness. The accuracy of the flow-around model was only slightly worse (35%). It was difficult to establish the geometry of the immersed solid body (sphere or cylinder) because experiment characteristics tended to change from sphere to cylinder with increasing PPI value.

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“…Therefore, the heat transfer is more intense [9], but on the other hand, the flow resistance is enhanced as well. The validity of this approach has been confirmed by many subsequent works [10][11][12][13][14]. Short-channel structures combine much more intense heat transfer properties than monoliths with a slight increase in flow resistance.…”

Section: Introductionmentioning

confidence: 68%

Momentum Transfer in Short-Channel Structures of Hexagonal Channel Cross-Section Shape: Experiments vs. CFD

2021

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Short-channel structures are promising catalyst carriers because it is easy to control the heat/mass transfer and fluid flow characteristics by changing their lengths. In this work, the flow resistance of hexagonal structures was investigated experimentally and numerically. The structure tested (6 mm long) was manufactured from AISI 316 steel using the selective laser melting technique. Due to some differences between theoretical approaches and practical results, two types of computational models were applied to analyze the pressure distribution in a short hexagonal duct. It was shown that although experimental results agree with some theoretical solutions, the channel wall thickness should not be omitted from the overall flow resistance. A comparison of short structures differing in channel length with widely used long monoliths was performed as well.

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Short-Channel Structured Reactor as a Catalytic Afterburner

Cited by 13 publications

References 11 publications

Gas‐phase flow resistance of metal foams: Experiments and modeling

Gas‐phase flow resistance of metal foams: Experiments and modeling

In Search of Governing Gas Flow Mechanism through Metal Solid Foams

Momentum Transfer in Short-Channel Structures of Hexagonal Channel Cross-Section Shape: Experiments vs. CFD

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