Numerical investigation on the wall-coated steam methane reformer improvement: Effects of catalyst layer patterns and metal foam insertion

Settar, Abdelhakim; Nebbali, Rachid; Madani, Brahim; Abboudi, Saïd

doi:10.1016/j.ijhydene.2015.04.100

Cited by 28 publications

(15 citation statements)

References 36 publications

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“…To achieve millisecond reforming processes, microchannel reactors have great potentiality in this field [11,21,23,26,27]. The microreaction technology offers process intensification by using microchannel reactors in the form of enhanced transport characteristics [23,24,27,28]. This technology has the potential to reduce reaction times significantly.…”

Section: Introductionmentioning

confidence: 99%

“…This technology has the potential to reduce reaction times significantly. Fast reaction kinetics are possible in microchannel reactors, as these small-scale systems have channels with dimensions smaller than 0.3 mm [11][12][13][14]21,22,27], thus significantly improving the transport rates [21,26,28]. The net result is that the efficiency of the chemical process systems can be significantly improved by means of microreaction technology [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Furthermore, the catalytic zone was reduced by 10% when the reactor was fitted with copper foam. Indeed, improvements in the hydrogen yield upon insertion of metal foam have also been reported in other studies 43‐46 …”

Section: Introductionsupporting

confidence: 69%

Numerical analysis of steam methane reforming over a novel multi‐concentric rings Ni/ Al ₂ O ₃ catalyst pattern

2021

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Summary Herein, a 2D numerical analysis is conducted to study the steam methane reforming reaction (SMR), which is the dominant method for hydrogen production, over a packed bed reactor embedded with a Ni/Al2O3 catalyst. Aiming to achieve higher methane conversion and low catalyst weight, a comparative study on an SMR reactor consisting of a 1‐m long, 0.04‐m diameter cylinder, is examined under three distinct operative configurations to explore new routes for process intensification. In the first configuration, the SMR reactor is filled with the catalyst in accordance with the conventional approach. In case 2, a novel design is proposed where the reactor is partially filled with annular catalyst bed patterns while in the last case, the length of the reactor is extended by 35.4% to obtain the same catalyst weight as in case 1 while adopting the annular catalyst patterns concept. The advantages of implementing the catalyst patterns concept over the conventional reactor are illustrated and justified. The results indicate that the partially filled reactor improves the methane conversion by 10.6% by reducing the catalyst weight by 26.16% compared to the conventional reactor. This latter leads to a lower overall cost of the reactor. Extending the reactor increases the methane conversion by around 23% compared to the conventional reactor; however, this affects the reactor compactness.

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“…To check the mathematical model describing the WC-SMR and validate the numerical results obtained in this paper, a comparison is made on our previous work, available in Settar et al [41].…”

Section: Numerical Proceduresmentioning

confidence: 99%

Numerical study on the effects of the macropatterned active surfaces on the wall-coated steam methane reformer performances

Settar

Nebbali

Madani

et al. 2017

International Journal of Hydrogen Energy

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Numerical investigation on the wall-coated steam methane reformer improvement: Effects of catalyst layer patterns and metal foam insertion

Cited by 28 publications

References 36 publications

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

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

Numerical analysis of steam methane reforming over a novel multi‐concentric rings Ni/ Al ₂ O ₃ catalyst pattern

Numerical study on the effects of the macropatterned active surfaces on the wall-coated steam methane reformer performances

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Numerical investigation on the wall-coated steam methane reformer improvement: Effects of catalyst layer patterns and metal foam insertion

Cited by 28 publications

References 36 publications

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

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

Numerical analysis of steam methane reforming over a novel multi‐concentric rings Ni/ Al 2 O 3 catalyst pattern

Numerical study on the effects of the macropatterned active surfaces on the wall-coated steam methane reformer performances

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Numerical analysis of steam methane reforming over a novel multi‐concentric rings Ni/ Al ₂ O ₃ catalyst pattern