Experimental verification of kinetics and internal diffusion impact on low temperature steam reforming of a propane-methane mixture over Ni-based catalyst

Шигаров, А. Б.; Усков, С. И.; Потемкин, Д.И.; Snytnikov, P.V.

doi:10.1016/j.cej.2021.132205

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…The study of the effect of pressure on the temperature and concentration is important to understand and control the reactions involved in the oxidation and reforming processes. Detailed information about the temperature and concentration allows one to understand transport phenomena in the reactor. , The pressure greatly affects the temperature and concentration in the reactor. Variations of the temperature and concentration will lead to the transport of energy and species present.…”

Section: Resultsmentioning

confidence: 99%

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Numerical Investigation of the Transport Phenomena in Microchannel Steam Reforming Reactors for Hydrogen Production

Chen

2023

Ind. Eng. Chem. Res.

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The fundamental transport phenomena in microchannel steam reforming reactors for hydrogen production are studied using dimensionless numbers. Numerical simulations are performed using chemical kinetics coupled with fluid mechanics to study different phenomena that lead to transport. The dimensionless numbers in transport phenomena are principally analyzed to provide insight into the reaction behaviors and characteristics. The effects of reaction pressure, catalyst porosity, and inlet Reynolds number are evaluated to understand the physical and chemical processes involved in the systems. The results indicate that hydrogen productivity is favored kinetically at higher pressures, but high process efficiency is difficult to achieve. Momentum diffusivity dominates the diffusion behavior, and heat diffuses slowly. Catalyst porosity is vital to ensuring effective operation. Higher levels of porosity allow more efficient hydrogen production and may resolve the problem of mass-transfer limitation. Convective rates dominate mass transfer, and diffusion contributes insignificantly. The tortuous Reynolds number depends heavily on the level of porosity. The Nusselt and Sherwood numbers depend heavily on the pressure but do not vary significantly with the Reynolds number.

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Section: Resultsmentioning

confidence: 99%

“…Detailed information about the temperature and concentration allows one to understand transport phenomena in the reactor. 69,70 The pressure greatly affects the temperature and concentration in the reactor. Variations of the temperature and concentration will lead to the transport of energy and species present.…”

Section: Resultsmentioning

confidence: 99%

Numerical Investigation of the Transport Phenomena in Microchannel Steam Reforming Reactors for Hydrogen Production

Chen

2023

Ind. Eng. Chem. Res.

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“…To promote useful and most complete utilization of APG (flare gases) at low-debit and remote oil and gas fields, a process of low-temperature steam reforming of hydrocarbons was proposed to produce methane-rich mixtures ( Potemkin et al., 2020 ; Shigarov, 2020 ; Shigarov et al., 2022 ; Snytnikov et al., 2018 ; S.I. Uskov et al., 2020 , 2019a , 2019b , 2017 ; Zyryanova et al., 2013a , 2013b , 2014 .…”

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confidence: 99%

Flare gas monetization and greener hydrogen production via combination with cryptocurrency mining and carbon dioxide capture

Snytnikov

Потемкин

2022

iScience

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Summary In view of the continuous debates on the environmental impact of blockchain technologies, in particular, cryptocurrency mining, accompanied by severe carbon dioxide emissions, a technical solution has been considered assuming direct monetization of associated petroleum gas currently being flared. The proposed approach is based on the technology of low-temperature steam reforming of hydrocarbons, which allows flare gas conditioning toward the requirements for fuel for gas piston and gas turbine power plants. The generation of electricity directly at the oil field and its use for on-site cryptocurrency mining transform the process of wasteful flaring of valuable hydrocarbons into an economically attractive integrated processing of natural resources. The process is not carbon neutral and is not intended to compete with zero-emission technologies, but its combination with technologies for carbon dioxide capture and re-injection into the oil reservoir can both enhance the oil recovery and reduce carbon dioxide emissions into the atmosphere. The produced gas can be used for local transport needs, while the generated heat and electricity can be utilized for on-site food production and biological carbon dioxide capture in vertical greenhouse farms. The suggested approach allows a significant decrease in the carbon dioxide emissions at oil fields and, although it may seem paradoxically, on-site cryptocurrency mining actually may lead to a decrease in the carbon footprint. The amount of captured CO 2 could be transformed into CO 2 emission quotas, which can be spent for the production of virtually “blue” hydrogen by steam reforming of natural gas in locations where the CO 2 capture is technically impossible and/or unprofitable.

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Computational study of the segmental catalysis of steam-methanol reforming in heat integrated microchannel reactors for hydrogen production

Chen

2023

Chemical Engineering and Processing - Process Intensification

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Experimental verification of kinetics and internal diffusion impact on low temperature steam reforming of a propane-methane mixture over Ni-based catalyst

Cited by 10 publications

References 19 publications

Numerical Investigation of the Transport Phenomena in Microchannel Steam Reforming Reactors for Hydrogen Production

Numerical Investigation of the Transport Phenomena in Microchannel Steam Reforming Reactors for Hydrogen Production

Flare gas monetization and greener hydrogen production via combination with cryptocurrency mining and carbon dioxide capture

Computational study of the segmental catalysis of steam-methanol reforming in heat integrated microchannel reactors for hydrogen production

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