Modeling of thermally-coupled monolithic membrane reformer for vehicular hydrogen production

Jiwanuruk, T.; Putivisutisak, Sompong; Vas-Umnuay, Paravee; Bumroongsakulsawat, Palang; Cheng, Chin Kui; Assabumrungrat, Suttichai

doi:10.1016/j.ijhydene.2017.08.210

Cited by 4 publications

(2 citation statements)

References 61 publications

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“…The arrangement of the endothermic and exothermic flows can greatly affect the internal heat exchange and thus the reactor performance. 78 Counter-current heat exchange systems, where the hot fluid and the cold fluid flow in opposite directions to each other, offer many advantages over co-current ( i.e. , parallel) heat exchange systems, where the two fluids flow in the same direction.…”

Section: Resultsmentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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Methane steam reforming coupled with methane catalytic combustion in microchannel reactors for the production of hydrogen was investigated by means of computational fluid dynamics. Special emphasis is placed on developing general guidelines for the design of integrated micro-chemical systems for the rapid production of hydrogen. Important design issues, specifically heat and mass transfer, catalyst, dimension, and flow arrangement, were explored. The relative importance of different transport phenomena was quantitatively evaluated, and some strategies for intensifying the reforming process were proposed. The results highlighted the importance of process intensification in achieving the rapid production of hydrogen. High heat and mass transfer rates derived from miniaturization of the chemical system are insufficient for process intensification. Improvement of the reforming catalyst is also essential.The efficiency of heat exchange can be improved greatly if the reactor dimension is properly designed.Thermal management is required to improve the reliability of the integrated system. Co-current heat exchange improves the thermal uniformity in the system. The catalyst loading is a key factor determining reactor performance, and must be carefully designed. Finally, engineering maps were constructed to achieve the desired power output, and favorable operating conditions for the rapid production of hydrogen were identified.

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Section: Resultsmentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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“…The two flow arrangements modeled in this paper are also given in Figure 1. In such a heat exchange design, efficient heat exchange within the small-scale system is possible [47][48][49]. Recent studies have demonstrated that the management of energy in a small-scale confined space is one of the great challenges in design [50,51].…”

Section: Description Of the Reaction Systemmentioning

confidence: 99%

RETRACTED: Production of Hydrogen by Methane Steam Reforming Coupled with Catalytic Combustion in Integrated Microchannel Reactors

et al. 2018

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This paper addresses the issues related to the rapid production of hydrogen from methane steam reforming by means of process intensification. Methane steam reforming coupled with catalytic combustion in thermally integrated microchannel reactors for the production of hydrogen was investigated numerically. The effect of the catalyst, flow arrangement, and reactor dimension was assessed to optimize the design of the system. The thermal interaction between reforming and combustion was investigated for the purpose of the rapid production of hydrogen. The importance of thermal management was discussed in detail, and a theoretical analysis was made on the transport phenomena during each of the reforming and combustion processes. The results indicated that the design of a thermally integrated system operated at millisecond contact times is feasible. The design benefits from the miniaturization of the reactors, but the improvement in catalyst performance is also required to ensure the rapid production of hydrogen, especially for the reforming process. The efficiency of heat exchange can be greatly improved by decreasing the gap distance. The flow rates should be well designed on both sides of the reactor to meet the requirements of both materials and combustion stability. The flow arrangement plays a vital role in the operation of the thermally integrated reactor, and the design in a parallel-flow heat exchanger is preferred to optimize the distribution of energy in the system. The catalyst loading is an important design parameter to optimize reactor performance and must be carefully designed. Finally, engineering maps were constructed to design thermally integrated devices with desired power, and operating windows were also determined.

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Numerical analysis of catalytic-coated walls of an indirect internal reforming solid oxide fuel cell: Influence of catalyst coating distribution on the reformer efficiency

Settar

Lebaal

Abboudi

2018

Energy Conversion and Management

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Modeling of thermally-coupled monolithic membrane reformer for vehicular hydrogen production

Cited by 4 publications

References 61 publications

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

RETRACTED: Production of Hydrogen by Methane Steam Reforming Coupled with Catalytic Combustion in Integrated Microchannel Reactors

Numerical analysis of catalytic-coated walls of an indirect internal reforming solid oxide fuel cell: Influence of catalyst coating distribution on the reformer efficiency

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