A micro-reactor with micro-pin-fin arrays for hydrogen production via methanol steam reforming

Mei, Deqing; Qian, Miao; Liu, Binhong; Jin, Biao; Yao, Zhehe; Chen, Zichen

doi:10.1016/j.jpowsour.2011.12.062

Cited by 93 publications

(27 citation statements)

References 33 publications

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“…High-temperature and compact micro heat exchangers can be manufactured using ceramic tape technology which uses fused ceramic layers to create channels with dimensions below 1 mm [200]. Metal-based microchannel heat exchangers are also of current interest because of the combination of high heat transfer performance and improved mechanical integrity [201]. Figure 44 shows a manufactured, flat extruded multichannel aluminum heat exchanger.…”

Section: Automotive and Aerospacementioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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Section: Automotive and Aerospacementioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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“…Dong et al [8] found that micro-pillar arrays would amplify and redistribute the electromagnetic field which enables the separation of cells or proteins with common antigens with low current, low heat dissipation and high efficiency. Mei et al [9] reported that micro-pin-fin array with catalyst coating is beneficial for a uniform velocity and temperature distribution in the reactor with a higher methanol conversion rate. Regardless of the ultimate purpose from application perspective, the in-built micro pin fin arrays fundamentally serves for augmentation of convective heat and mass transfer by forming a tortuous flow path in which the development of both thermal and concentration boundary layer ends up with separation and thereafter wake flow in the tail region due to adverse pressure gradient having to start all over again when encountering the next pin fin downstream.…”

Section: Introductionmentioning

confidence: 99%

Entropy generation and optimization of laminar convective heat transfer and fluid flow in a microchannel with staggered arrays of pin fin structure with tip clearance

Shi

Dong

2015

Energy Conversion and Management

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“…34 , relating to a sample in the cathode of a PEMFC environment (about 0.6V vs. SCE), the passivation-current density must be less than 1.0 μA cm -2 ; thus, a vertical line was set as the standard in Figure 4. Table 5 shows the passive-current density of the samples in the PEMFC cathode. When the power of the Mo target is 30 W, the sample has a good corrosion resistance in the PEMFC environment, and it is also close to the technical index of DOE.…”

Section: Xrd Testmentioning

confidence: 99%

“…1,2 The proton-exchangemembrane fuel cell (PEMFC) is considered to be a competitive candidate as the next-generation power source for automotive, stationary and portable applications due to its prominent characteristics including a quick startup, zero emission, high efficiency, etc. [3][4][5] It is a device that directly and efficiently converts chemical energy into electricity. 6 One of the most expensive and heaviest components in a PEMFC stack is the bipolar plate (BPP).…”

Section: Introductionmentioning

confidence: 99%

ZrMoN films on 304 stainless steel as bipolar plates for PEMFCs using physical-vapor-deposition (PVD) technology

Zheng¹,

Chen²

2017

Mater. Tehnol.

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ZrMoN films were deposited on a 304 stainless-steel (SS304) substrate with a radio-frequency (RF) reactive magnetron-sputtering system and the properties were changed by adjusting the power of the Mo target. The corrosion behaviors of the ZrMoN films were investigated with potentiodynamic tests and electrochemical impedance spectroscopy (EIS) under the condition of an aerated 0.5M H2SO4 + 1,99 mg/L NaF solution at 70°C. The results revealed that all samples with ZrMoN films have good hydrophobicity. The XRD test showed that the ZrMoN film is the substitutional solid solution of Mo atoms into ZrN films. As an overall evaluation, the power of the Mo target is 30W. A coated sample displays the best corrosion resistance in the cathode of the PEMFC environment when the power of the Mo target is considered, which indicates that with an increase of the power of the Mo target, the solid solubility also increases; but with a continuous increase of the Mo-target power, the solubility increases and a lattice distortion also occurs, leading to an increase in defects. Keywords: ZrMoN, corrosion behavior, bipolar-plate material, physical-vapor-deposition technology (PVD) ZrMoN prevleke so bile nane{ene na substrat 304 nerjavnega jekla (SS 304) z radiofrekven~nim reaktivnim (angl. RF) magnetronskim napr{evalnikom in lastnosti so bile spremenjene s prilagoditvijo mo~i Mo tar~e. Korozijsko obna{anje prevlek ZrMoN smo raziskovali s potenciodinamskimi preizkusi in elektrokemijsko impedan~no spektroskopijo (EIS) v raztopini 0,5 M H2SO4 + 1,99 mg/L NaF pri temperaturi 70°C. Rezultati so pokazali, da imajo vsi vzorci z ZrMoN prevlekami dobro hidrofobnost. XRD-analiza ka`e, da je prevleka ZrMoN nadomestna trdna raztopina atomov Mo v ZrN plasti. Rezultati ka`ejo najbolj{o korozijsko odpornost na katodi v okolju PEMFC pri mo~i Mo tar~e 30 W, kar ka`e, da se s pove~anjem mo~i Mo pove~uje tudi trdna topnost. Vendar pa se s kontinuiranim pove~evanjem mo~i Mo tar~e neprestano pove~uje tudi topnost, zato pride do popa~enja kristalne mre`e, kar povzro~i pove~anje napak. Klju~ne besede: ZrMoN, korozijsko obna{anje, bipolarni material, tehnologija nana{anja iz parne faze (PVD)

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A micro-reactor with micro-pin-fin arrays for hydrogen production via methanol steam reforming

Cited by 93 publications

References 33 publications

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Entropy generation and optimization of laminar convective heat transfer and fluid flow in a microchannel with staggered arrays of pin fin structure with tip clearance

ZrMoN films on 304 stainless steel as bipolar plates for PEMFCs using physical-vapor-deposition (PVD) technology

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