A theoretical and experimental study on hydrodynamics, heat exchange and diffusion during methane pyrolysis in a layer of molten tin

Кудинов, И. В.; Пименов, А. А.; Kryukov, Yu. A.; Mikheeva, G. V.

doi:10.1016/j.ijhydene.2020.12.138

Cited by 32 publications

(8 citation statements)

References 26 publications

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“…Then, to ensure complete carbon removal, a filter bag was placed downstream to remove very fine particles. Another design was recently suggested by Kudinov et al [32], which could efficiently separate the carbon periodically (Figure 4). They proposed to insert in the reactor a floating structure to detect the level of the surface.…”

Section: Reactor Designmentioning

confidence: 99%

“…have low melting points (200-700 • C). Because the latter ones exhibit negligible catalytic activity, such as pure Sn melt [3,8,32], alloys composed of active and inert metals are used for pyrolysis while expecting a good conversion [33].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 4.Reactor design for periodic carbon separation in a continuous molten media methane cracking process (adapted from Ref [32]. with Elsevier permission).…”

mentioning

confidence: 99%

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Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

2021

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Currently, hydrogen is mainly generated by steam methane reforming, with significant CO2 emissions, thus exacerbating the greenhouse effect. This environmental concern promotes methane cracking, which represents one of the most promising alternatives for hydrogen production with theoretical zero CO/CO2 emissions. Methane cracking has been intensively investigated using metallic and carbonaceous catalysts. Recently, research has focused on methane pyrolysis in molten metals/salts to prevent both reactor coking and rapid catalyst deactivation frequently encountered in conventional pyrolysis. Another expected advantage is the heat transfer improvement due to the high heat capacity of molten media. Apart from the reaction itself that produces hydrogen and solid carbon, the energy source used in this endothermic process can also contribute to reducing environmental impacts. While most researchers used nonrenewable sources based on fossil fuel combustion or electrical heating, concentrated solar energy has not been thoroughly investigated, to date, for pyrolysis in molten media. However, it could be a promising innovative pathway to further improve hydrogen production sustainability from methane cracking. After recalling the basics of conventional catalytic methane cracking and the developed solar cracking reactors, this review delves into the most significant results of the state-of-the-art methane pyrolysis in melts (molten metals and salts) to show the advantages and the perspectives of this new path, as well as the carbon products’ characteristics and the main factors governing methane conversion.

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Section: Reactor Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

2021

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“…Последующая очистка стенок реактора является сложной технологической задачей. Некоторые методы удаления твердого углерода из реактора описаны в работе [19]. Суть проблемы в том, что сам металлический корпус выступает в роли катализатора, что ускоряет образование твердого углерода на стенках реактора.…”

Section: принцип работыunclassified

Obtaining Hydrogen by Thermocatalytic Decomposition of Methane Using a Catalyst ‘Nickel on Kieselgur’

Zhelnov,

Dolgikh,

Ivanov

et al. 2024

jour

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The process of hydrogen production through thermocatalytic decomposition of methane using a “nickel on kieselgur” catalyst on a quartz sand substrate with a thickness of 1 cm in the “sand-catalyst-sand” configuration was investigated in this work. The experimental results revealed a dependence of the percentage yield of hydrogen on temperature within the temperature range of 530°C to 770°C. As a result, a hydrogen content of 68% in the gas mixture was achieved at the reactor outlet under the conditions of 770°C temperature and a methane flow rate of 2 l/h.

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“…However, the removal of carbon from the reactor, which is formed as a result of the reaction in the form of soot, is a complex technological problem. To solve this problem, there is a need to develop methods for its removal, described in the article [21].…”

Section: Introductionmentioning

confidence: 99%

Experimental research of the process of methane pyrolysis in a layer of liquid tin aiming to get hydrogen

Dolgikh

Pashin

Mikheeva

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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One of the perspective methods to get the hydrogen with zero CO/CO2 emissions is the thermal decomposition of methane. In the present work, the research was focused on the pyrolysis of methane in a layer of liquid tin. During the experiments, a 30% conversion of methane was obtained for a reactor with a height of 0.1 m. During the thermal decomposition of methane, solid carbon particles appear in the form of soot. These particles must be removed mechanically to avoid clogging the reactor.

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A theoretical and experimental study on hydrodynamics, heat exchange and diffusion during methane pyrolysis in a layer of molten tin

Cited by 32 publications

References 26 publications

Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis

Obtaining Hydrogen by Thermocatalytic Decomposition of Methane Using a Catalyst ‘Nickel on Kieselgur’

Experimental research of the process of methane pyrolysis in a layer of liquid tin aiming to get hydrogen

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