Optimizing the porosity configuration of porous copper fiber sintered felt for methanol steam reforming micro-reactor based on flow distribution

Wang, Qinghui; Song, Yang; Zhou, Wei; Li, Jing‐Rong; Xu, Zhijia; Ke, Yuzhi; Yu, Wei; Hu, Guanghua

doi:10.1016/j.apenergy.2018.02.102

Cited by 35 publications

(7 citation statements)

References 70 publications

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“…Forced convection of species in the microreactor is governed by Eq. (8). This equation describes the advectivediffusive-reactive nature of transport of mass transfer in the axial and transversal directions.…”

Section: Resultsmentioning

confidence: 99%

“…Often, biofuels have strong non-Newtonian characteristics, and thus the problem includes interactions amongst non-Newtonian fluids, magnetic fields, heat of reactions and transport processes associated with fuel reforming. Further, due to the need for high rates of heat transfer, porous media are commonly used in fuel microreactors [8,9]. Combination of all these interactions renders a very complicated and largely unknown problem and hinders development of a rigorous physical understanding of the system.…”

Section: Introductionmentioning

confidence: 99%

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Double-diffusive transport and thermodynamic analysis of a magnetic microreactor with non-Newtonian biofuel flow

Saeed

Karimi

Hunt

et al. 2019

J Therm Anal Calorim

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Magnetic microfuel-reforming is a promising method of biofuel processing in diesel engines. However, the complex interactions amongst the non-Newtonian biofuel flow, magnetic field and reactor have hindered understanding of their influences upon the transport phenomena in the system. To resolve this issue, the transport of heat and mass in a porous microreactor containing a Casson rheological fluid and subject to a magnetic field is investigated analytically. The system is assumed to host a homogenous and uniformly distributed endothermic/exothermic chemical reaction. Two-dimensional analytical solutions are developed for the temperature and concentration fields as well as the Nusselt number and local entropy generations, and the results are rigorously validated. It is demonstrated that changes in the non-Newtonian characteristics of the fluid and altering the magnetic and thermal radiation properties can lead to bifurcation of temperature gradient on the surface of the porous medium. The general behaviour of such bifurcation is dominated by the exothermicity (or endothermicity) of the chemical reaction in the fluid phase. It is also shown that variations in the Casson fluid parameter and changes in the intensity and incident angle of the magnetic field can modify the Nusselt number considerably. The extent of these modifications is found to be heavily dependent upon the wall thickness and diminishes as the walls become thicker. Further, the total entropy generation is shown to be highly sensitive to the wall thickness and increases by intensifying the magnetic field, provided that the microreactor walls are thin.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Double-diffusive transport and thermodynamic analysis of a magnetic microreactor with non-Newtonian biofuel flow

Saeed

Karimi

Hunt

et al. 2019

J Therm Anal Calorim

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“…The adhesion of Pt catalyst on the nickel foam was investigated using ultrasonic cleaning machine at ultrasonic frequency of 40 kHz [9] . 3)) [28] . The pre-exponential factor of methanol oxidation was set to 4e+06.…”

Section: Pressure Drop Testmentioning

confidence: 99%

“…The temperature inspection instrument with 0.1 measurement accuracy (AT4516, Applent Instruments Company, China) was used to investigate the temperatures of the different points on combustion chamber plate of the microreactor. The maximum difference and the maximum in the temperature distribution of the nine points were used for determining combustion performance of the microreactor [28] . The low maximum difference and the low maximum in the temperature distribution indicated the better combustion performance.…”

Section: Combustion Performance Testmentioning

confidence: 99%

“…The MSR reactant was reacted with the PdZn catalyst which was on the copper foam in reforming chamber plate of the microreactor [34] . The soap bubble flowmeter with ±1% measurement deviation (JCL-2010(S)-A, Qingdao Juchuang Environmental Company, China) was used to investigate the flow rate of total reaction product, the gas chromatograph with 50 ppm measurement accuracy (GC2014C, Shimadzu Company, Japan) was used to determine the volume fractions of different reaction products [28] .…”

Section: Combustion Performance Testmentioning

confidence: 99%

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Novel Nickel Foam with Multiple Microchannels as Combustion Reaction Support for the Self-Heating Methanol Steam Reforming Microreactor

et al. 2020

Self Cite

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To improve hydrogen production performance of self-heating methanol steam reforming (MSR) microreactor, a novel nickel foam with multiple microchannels was proposed as combustion reaction support. A wall temperature comparison of the methanol combustion microreactors with nickel foam catalyst support and particles catalyst support in the combustion reaction process was performed. According to the numerical simulation results of combustion reaction of nickel foam, the shape and size of multiple microchannels of nickel foam were determined. The laser processing was then used to fabricate the multiple microchannels of nickel foam. The experimental results show that the methanol combustion microreactor with nickel foam loaded with Pt catalyst exhibits similar wall temperature distribution with the methanol combustion microreactor with 2 O 3 particles reaction support. Compared with the nickel foam without microchannel, the T max (maximum temperature difference) and the maximum in the temperature distribution of nickel foam with multiple microchannels decreased respectively by 57.8% and 33.8 when 1.1 mL/min methanol flow rate was used.Hydrogen production performance of self-heating MSR microreactor using the nickel foam with multiple microchannels increased by about 21% when 430 reforming temperature and 4 mL/h methanol-water mixture flow rate were performed.

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Embedding Pt‐SnO Nanoparticles into MIL‐101(Cr) Pores: Hydrogen Production with Low Carbon Monoxide Content from a New Methanol Steam Reforming Catalyst

et al. 2019

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The catalyst Pt‐SnO@MIL‐101(Cr) was prepared using the cis‐PtCl(SMe2)2(SnCl3) complex as a single precursor and characterized by inductively coupled plasma optical emission spectroscopy, (ICP‐OES), X‐ray powder diffraction (XRD), BET surface area analysis (SBET), X‐ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), field‐emission scanning electron microscopy (FE‐SEM), and temperature program reduction (TPR). A new complex, cis‐PtCl(SMe2)2(SnCl3), was synthesized from the reaction of PtCl2(SMe2)2 with SnCl2 and characterized by thermogravimetric analysis (TGA), ICP‐OES, and 1H NMR spectroscopy and used as the source of metals for preparation of the catalysts. The fabricated catalyst, Pt‐SnO@MIL‐101(Cr), with 10.2%, 19.7%, and 28.9% platinum loadings were used in a steam reforming of methanol (MSR) reaction using a microstructure monolith reactor in the temperature range of 150–300 °C. A high methanol conversion with a good selectivity of H2 and low CO selectivity was achieved in light of the stability of the catalyst with a small amount of coke formation in the monolith system.

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Optimizing the porosity configuration of porous copper fiber sintered felt for methanol steam reforming micro-reactor based on flow distribution

Cited by 35 publications

References 70 publications

Double-diffusive transport and thermodynamic analysis of a magnetic microreactor with non-Newtonian biofuel flow

Double-diffusive transport and thermodynamic analysis of a magnetic microreactor with non-Newtonian biofuel flow

Novel Nickel Foam with Multiple Microchannels as Combustion Reaction Support for the Self-Heating Methanol Steam Reforming Microreactor

Embedding Pt‐SnO Nanoparticles into MIL‐101(Cr) Pores: Hydrogen Production with Low Carbon Monoxide Content from a New Methanol Steam Reforming Catalyst

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