Porous copper fiber sintered felts with surface microchannels for methanol steam reforming microreactor for hydrogen production

Ke, Yuzhi; Zhou, Wei; Chu, Xia; Yuan, Ding; Wan, Shaolong; Yu, Wei; Liu, Yangxu

doi:10.1016/j.ijhydene.2019.01.141

Cited by 54 publications

(15 citation statements)

References 45 publications

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“…also used porous copper fiber sintered felts as catalyst support on the microreactor surface to investigate the effect of the microchannel geometry on the methanol steam reforming process. The authors concluded that the rectangular microchannel demonstrated lower pressure drop while achieving the highest methanol conversion compared to the other investigated geometries 205. Also, the methanol conversion rate could increase by utilizing porous copper‐aluminum fiber sintered felts instead of porous copper fiber sintered felts, and the conversion increases with higher aluminum fiber weight 206.…”

Section: Heterogeneous Reactions In Microreactorsmentioning

confidence: 97%

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

2022

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Heterogeneous reactions are considered the heart of chemical synthesis with numerous industrial applications due to their high conversion rates and low reaction time. On the other hand, the performance of heterogeneous reactions suffers from several drawbacks such as lower product selectivity and high mass transfer resistance that, in many cases, reduce the reaction rate. The efficiency of various conventional mixing techniques in heterogeneous reactors is believed to play a critical role in controlling the product quality and mass transfer rates besides other essential factors. Microfluidics technology provides a unique opportunity to revisit many established heterogeneous reaction processes to optimize and understand the reaction mechanisms. The unique flow conditions in microflow systems provide an excellent platform for exploring the effect of high‐precision micromixing techniques on reaction rates and productivities. Recent advances in microreactor technology in general and specifically heterogeneous reactions in microflow systems with an insight on the enzymatic reactions in microreactors are reviewed.

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Section: Heterogeneous Reactions In Microreactorsmentioning

confidence: 97%

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

2022

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“…We utilize the stochastic network generation algorithm to investigate the material reported in Ref. [13], where 80% porosity fibrous porous material of macroscopic size of 70 × 40 × 2 mm 3 (x × y × z) is processed with parallel rectangular microchannels. The cross-section size of each microchannel is 1 × 1 mm 2 , and the adjacent microchannel spacing is 2 mm.…”

Section: Microchannel Modelingmentioning

confidence: 99%

“…These works further inspire the idea of the combination of microchannels and pore structures (Figure 1). Fabricating microchannels on porous structures was proposed [11][12][13] and applied in a methanol steam reforming (MSR) as catalyst support layers, and enhanced hydrogen production was obtained comparing the ones without microchannels. However, on the one hand, experimental measurements for obtaining physical properties could be hard to conduct due to a small pore size.…”

Section: Introductionmentioning

confidence: 99%

The Impacts of Surface Microchannels on the Transport Properties of Porous Fibrous Media Using Stochastic Pore Network Modeling

et al. 2021

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A stochastic pore network modeling method with tailored structures is proposed to investigate the impacts of surface microchannels on the transport properties of porous fibrous media. Firstly, we simplify the original pore network extracted from the 3D images. Secondly, a repeat sampling strategy is applied during the stochastic modeling of the porous structure at the macroscale while honoring the structural property of the original network. Thirdly, the microchannel is added as a spherical chain and replaces the overlapped elements of the original network. Finally, we verify our model via a comparison of the structure and flow properties. The results show that the microchannel increases the permeability of flow both in the directions parallel and vertical to the microchannel direction. The microchannel plays as the highway for the pass of reactants while the rest of the smaller pore size provides higher resistance for better catalyst support, and the propagation path in the network with microchannels is more even and predictable. This work indicates that our modeling framework is a promising methodology for the design optimization of cross-scale porous structures.

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“…In this work, a promising porous fibrous material, known as a porous metal fiber sintered sheet (PMFSS), which has been successfully applied in fuel cells as a catalyst support layer [ 32 ] and a wipe in a heat pipe [ 33 ], was investigated for its effective diffusivity. The effective diffusion in the IP and TP directions using both LBM and PNM methods are performed and compared, along with the tortuosity deduced from the transport and morphological measurements.…”

Section: Introductionmentioning

confidence: 99%

Effective Diffusion in Fibrous Porous Media: A Comparison Study between Lattice Boltzmann and Pore Network Modeling Methods

2021

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The understanding of the correlation between a pore-scale structure and its coupled diffusion transport property is crucial in the virtual design and performance optimization of porous fibrous material for various energy applications. Two most common and widely employed pore-scale modeling techniques are the lattice Boltzmann method (LBM) and the pore network modeling (PNM). However, little attention has been paid to the direct comparison between these two methods. To this end, stochastic porous fibrous structures are reconstructed reflecting the structural properties of the fibrous porous material on a statistical level with structural properties obtained from X-ray computed microtomography. Diffusion simulation through the porous phase was subsequently conducted using LBM of D3Q7 lattice and topological equivalent PNM derived from the watershed method, respectively. It is detected that the effective diffusion coefficients between these two methods are in good agreement when the throat radius in the pore network is estimated using the cross-section area equivalent radius. Like most literature, the diffusivity in the in-plane (IP) direction is larger than in the through-plane (TP) direction due to the laid fiber arrangement, but the values are very close. Besides, tortuosity was evaluated from both geometry and transport measurements. Tortuosity values deduced from both methods are in line with the anisotropy of the diffusion coefficients.

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Porous copper fiber sintered felts with surface microchannels for methanol steam reforming microreactor for hydrogen production

Cited by 54 publications

References 45 publications

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

The Impacts of Surface Microchannels on the Transport Properties of Porous Fibrous Media Using Stochastic Pore Network Modeling

Effective Diffusion in Fibrous Porous Media: A Comparison Study between Lattice Boltzmann and Pore Network Modeling Methods

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