A numerical study of internally heating, counter-flow tubular packed bed reactor for methanol steam reforming

Kusumastuti, Rizky; Sasmoko,; Cheng, Po-Chun; Tseng, Chung Jen

doi:10.1016/j.ijhydene.2023.04.187

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…Broadly, the mixed gas adsorption isotherm data coupled with the high-temperature isotherms indicate that CALF-20 is well suited for steam regeneration which is appealing because of the availability of steam industrially. − For example, in one approach, after CO 2 is captured the bed could be heated and purged with steam to remove the CO 2 from the bed because CALF-20 has shown no changes in surface area due to exposure to water at temperatures as high as 175 °C and pressures of approximately 7 bar (Figure S4b). Before repeating the adsorption step, the bed could be cooled and purged with nitrogen .…”

Section: Resultsmentioning

confidence: 99%

Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20

Hastings,

Lassitter,

Fylstra

et al. 2024

Ind. Eng. Chem. Res.

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has emerged as a metal−organic framework (MOF) that is steam-stable and exhibits selective CO 2 physisorption over water vapor, which makes it a candidate for industrial-scale CO 2 capture from flue gases. In this work, multicomponent CO 2 /H 2 O adsorption data show that the α-to-β phase transformation has little impact on the multicomponent CO 2 adsorption capacity of CALF-20. Also, H 2 O isotherms up to 175 °C reveal only limited changes in the water capacity as temperature increases above 45 °C. CO 2 and H 2 O single-component diffusion rates were measured via concentration swing frequency response. The results show that the diffusion rate of water through CALF-20 is similar to that of water diffusion in the highly water-permeable MOF-333, as well as BPL-activated carbon. The data provides key insight into the fundamental thermodynamic and mass transfer parameters that govern the separation of CO 2 and H 2 O using CALF-20 and provides quantified parameters that can be used to model adsorption systems based on CALF-20.

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Section: Resultsmentioning

confidence: 99%

Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20

Hastings,

Lassitter,

Fylstra

et al. 2024

Ind. Eng. Chem. Res.

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“…The governing equations include mass, momentum, energy and species equations, which are expressed as follows (Han et al , 2022; Hsueh et al , 2010a; Kusumastuti et al , 2024).…”

Section: Model Descriptionmentioning

confidence: 99%

Effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the microchannel reactor

Kong,

Shen,

Huang

et al. 2024

HFF

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Purpose The purpose of this study is to investigate the effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the auto-thermal methanol steam reforming microchannel reactor. Design/methodology/approach Computational fluid dynamics (CFD) method is used to study four different gradient designs. The corresponding distributions of temperature, species and chemical reaction rate are provided and compared. Findings The distributions of species, temperature and chemical reaction rate are significantly affected by the catalyst distribution in the combustion catalytic layer. A more uniform temperature distribution can be observed when the gradient design is used. Meanwhile, the methanol conversion rate is also improved. Practical implications This work reveals the effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the auto-thermal methanol steam reforming microchannel reactor and provides guidance for the design of reactors. Originality/value The temperature uniformity and hydrogen production performance can be improved by the gradient design in the combustion catalytic layer.

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“…Presently, most simulation studies on methanol reforming reactors employ porous media models to simplify the catalyst component, which does not accurately reflect the actual state of the catalyst bed. Moreover, while most reactors used for methanol reforming are single-tubular [9,10] or involve new structures [11][12][13] , few studies have focused on multi-tubular reactors, which offer larger heat transfer coefficients, compact design, and minimal space requirements. This study aims to design a multi-tube process exhaust waste heat recovery methanol reforming to hydrogen reactor and to examine the influence of key parameters on reforming performance.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a multi-tube exhaust waste heat recovery methanol reforming to hydrogen reactor

Li,

Tang,

Long

et al. 2024

AETR

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To address hydrogen storage and transport challenges, a methanol reforming hydrogen reactor featuring multi-pipe exhaust heat recovery was simulated using Fluent. Initial simulations focused on microscopic flow, heat transfer, and reaction dynamics within a catalyst particle stack. Subsequent macroscopic analyses of a comprehensive reactor model evaluated how reactant inlet velocity, molar ratio of steam to methanol vapor (S/M), exhaust temperature, and flow impact reforming performance. Findings indicate that smaller catalyst particles enhance heat transfer and reaction at the cost of increased pressure drop, with an optimal size of 4.4 mm. Methanol conversion correlates positively with S/M, exhaust temperature, and flow, but negatively with inlet velocity. Hydrogen production increases then decreases with S/M, showing positive correlation with inlet velocity, exhaust temperature, and flow. Carbon monoxide selectivity is inversely related to inlet velocity and S/M, and positively to exhaust temperature and flow.

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A numerical study of internally heating, counter-flow tubular packed bed reactor for methanol steam reforming

Cited by 6 publications

References 33 publications

Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20

Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20

Effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the microchannel reactor

Performance analysis of a multi-tube exhaust waste heat recovery methanol reforming to hydrogen reactor

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A numerical study of internally heating, counter-flow tubular packed bed reactor for methanol steam reforming

Cited by 6 publications

References 33 publications

Steam Isotherms, CO2/H2O Mixed-Gas Isotherms, and Single-Component CO2 and H2O Diffusion Rates in CALF-20

Steam Isotherms, CO2/H2O Mixed-Gas Isotherms, and Single-Component CO2 and H2O Diffusion Rates in CALF-20

Effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the microchannel reactor

Performance analysis of a multi-tube exhaust waste heat recovery methanol reforming to hydrogen reactor

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Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20

Steam Isotherms, CO₂/H₂O Mixed-Gas Isotherms, and Single-Component CO₂ and H₂O Diffusion Rates in CALF-20