Modeling of a square channel monolith reactor for methane steam reforming

Inbamrung, Piyanut; Sornchamni, Thana; Prapainainar, Chaiwat; Tungkamani, Sabaithip; Narataruksa, Phavanee

doi:10.1016/j.energy.2018.03.139

Cited by 28 publications

(12 citation statements)

References 46 publications

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“…To address this issue, great efforts have been made in recent years to illustrate how process intensication can be achieved through microchannel reactors. [33][34][35][36] Reaction engineering analysis is necessary to develop new processintensifying methods to meet the need of the rapid production of hydrogen from steam reforming. To successfully design microfabricated chemical systems and to further intensify the involved chemical process, a detailed understanding of the underlying mechanism of the transport phenomena is also necessary.…”

Section: -28mentioning

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: -28mentioning

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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“…Narataruksa et al performed an interesting study to achieve optimal dimensions of a monolithic catalytic ceramic reactor for the highest rate of reaction in MSR [100]. The authors, by means of an analytical and CFD model, individuated the optimal length of a square channel monolithic reactor.…”

Section: Ceramic Carriersmentioning

confidence: 99%

A Short Review on Ni Based Catalysts and Related Engineering Issues for Methane Steam Reforming

2020

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Hydrogen is an important raw material in chemical industries, and the steam reforming of light hydrocarbons (such as methane) is the most used process for its production. In this process, the use of a catalyst is mandatory and, if compared to precious metal-based catalysts, Ni-based catalysts assure an acceptable high activity and a lower cost. The aim of a distributed hydrogen production, for example, through an on-site type hydrogen station, is only reachable if a novel reforming system is developed, with some unique properties that are not present in the large-scale reforming system. These properties include, among the others, (i) daily startup and shutdown (DSS) operation ability, (ii) rapid response to load fluctuation, (iii) compactness of device, and (iv) excellent thermal exchange. In this sense, the catalyst has an important role. There is vast amount of information in the literature regarding the performance of catalysts in methane steam reforming. In this short review, an overview on the most recent advances in Ni based catalysts for methane steam reforming is given, also regarding the use of innovative structured catalysts.

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“…The devices with a packed bed filled the particles are widely used in various industries: chemical engineering, energy, petrochemistry, and so on. The packed beds are used to improve the contact between two phases for heat and mass transfer in chemical reactors, in absorbers, and in thermochemical recuperators, and so on. The calculation of the gas dynamics of the flow in such devices is an important engineering and scientific‐technical problem.…”

Section: Introductionmentioning

confidence: 99%

Numerical calculation with experimental validation of pressure drop in a fixed‐bed reactor filled with the porous elements

2020

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To study flow dynamics in a fixed‐bed reactor, experiment and numerical simulation are used. In this work, the flow dynamics in a fixed‐bed reactor filled with porous particles was simulated. For verification, experimental data were used. Porous particles were prepared from grains with sizes from 0.2 to 2.0 mm. Porous particles made by sintering grains in a muffle furnace. The study of pressure drop was performed in the velocity range up to 3 m/s. Numerical calculation was performed for a realistic computational domain obtained by RBD‐algorithm (rigid body dynamics). It was found that if the pore size is less than 0.5 mm, then the flow through the porous medium of particles is minimal; if the pore size is larger than 0.5 mm, then there is a flow through the porous elements of the fixed‐bed reactor. To take into account the porosity of the particles, γ correlation coefficient was proposed for the Ergun equation.

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Modeling of a square channel monolith reactor for methane steam reforming

Cited by 28 publications

References 46 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

A Short Review on Ni Based Catalysts and Related Engineering Issues for Methane Steam Reforming

Numerical calculation with experimental validation of pressure drop in a fixed‐bed reactor filled with the porous elements

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