Experimental, kinetic and 2-D reactor modeling for simulation of the production of hydrogen by the catalytic reforming of concentrated crude ethanol (CRCCE) over a Ni-based commercial catalyst in a packed-bed tubular reactor

Akpan, Enefiok; Akande, Abayomi; Aboudheir, Ahmed; Ibrahim, Hussam; Idem, Raphael

doi:10.1016/j.ces.2007.03.006

Cited by 72 publications

(61 citation statements)

References 35 publications

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“…The data for gas density and the overall heat transfer coefficient were taken from Akande et al [12]. The data for heat capacity and effective thermal conductivity were taken from Akpan et al [17]. The data for effective diffusivity was calculated using the Gilliland equation [18].…”

Section: Model Predictionmentioning

confidence: 99%

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts

2009

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As a result of skyrocketing prices, environmental concerns and depletion associated with fossil fuels, renewable fuels are becoming attractive alternatives. In this respect, the demand for biodiesel has increased tremendously in recent years. Increased production of biodiesel has resulted in a glut of glycerol that has reduced the demand for this once valuable commodity. Consequently, finding alternative uses for glycerol is a timely proposition. One alternative is producing renewable hydrogen from this cheap commodity. Only a handful of studies have been conducted on producing hydrogen from glycerol. Previous studies have mainly focused on finding effective catalysts for glycerol steam reforming. This paper extends previous knowledge by presenting kinetic parameters in relation to glycerol steam reforming over Ni/CeO 2 and a reactor modeling. The study found that the activation energy and the reaction order for the glycerol steam reforming reaction over Ni/CeO 2 catalyst were 103.4 kJ/mol and 0.233, respectively.

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Section: Model Predictionmentioning

confidence: 99%

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts

2009

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“…The percentage of hydrogen obtained from ethanol (inversion rate) differs with catalyst temperature and the space velocity of ethanol/water vapor. Figure 5 shows the experimental result of the ethanol vapor reforming using a commercial catalyst in E. Akpan, et al 5) . Figure 5 shows the relations between the amount of catalyst per flow rate of ethanol, the temperature of the catalyst layer, and the inversion rate.…”

Section: Analysis Methodsmentioning

confidence: 99%

Study on a Bioethanol Solar Reforming System with the Solar Insolation Fluctuation in Consideration of Heat Chemical Reaction

Obara

El-Sayed²

2009

JPES

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A bioethanol reforming system (FBSR) with a sunlight heat source is developed as a potential fuel supply system for distributed fuel cells. The temperature distribution of a catalyst layer in the reactor is not stable under conditions of unstable solar radiation and unstable outside air temperature; therefore, it is thought that the inversion rate of a reforming reaction will decrease. In this paper, heat transmission analysis was used in the catalyst layer of the reforming component of an FBSR, and temperature distribution, inversion rate, and process gas composition were investigated. Based on the results, the relationship between weather conditions and a hydrogen-generating rate was determined. When solar insolation was unstable, it turned out that the efficiency of the reforming component is reduced. Fluctuations of the solar insolation over a short period of time affect the hydrogen generating rate of an FBSR. Moreover, the amount of hydrogen production of an FBSR was simulated using meteorological data from a day in March and a day in August in a cold region (Sapporo). The analysis showed that efficiency of the reforming component exceeded 40% for both of the days.

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“…The percentage of hydrogen obtained from ethanol (inversion ratio) differs with catalyst temperature and the space velocity of ethanol/water vapor. Figure 4 shows the experimental result of the ethanol vapor reforming using a commercial catalyst in Akpan et al [12]. ratio.…”

Section: Analysis Proceduresmentioning

confidence: 99%

“…Central differences are used in the discretized equation. The mass flow rate of the process gas is calculated using equation (12); and the boundary conditions in this case are equations (13) and (14). u g in equation (12) is the volume flow rate of process gas and q g is the mean density.…”

Section: Analysis Proceduresmentioning

confidence: 99%

A simulation study of a bioethanol‐solar‐reforming system for proton‐exchange membrane fuel cell home cogeneration system

Obara

2014

Energy Science & Engineering

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The energy supply characteristic of a proton-exchange membrane fuel cell for houses is strongly influenced in a hydrogen supply unit. Therefore, a bioethanol reforming system (FBSR) with a sunlight heat source is developed as a potential fuel supply system for distributed fuel cells. However, the temperature distribution of a catalyst layer in the reactor is not stable under conditions of unstable solar radiation and unstable outside air temperature; as a result, it is thought that the inversion ratio (the percentage of hydrogen obtained from ethanol) of a reforming reaction will decrease. In this paper, heat transmission analysis was used in the catalyst layer of the reformer of FBSR, and the fundamental performance of FBSR was investigated. Fluctuations of the solar insolation over a short period of time affect the hydrogen-generating rate of FBSR. Moreover, the amount of hydrogen production of FBSR was simulated using meteorological data from a day in March and a day in August in a cold region (Sapporo in Japan). In this research, the relation between the collected area of a solar collector and the energy supply to an individual house was obtained.

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Experimental, kinetic and 2-D reactor modeling for simulation of the production of hydrogen by the catalytic reforming of concentrated crude ethanol (CRCCE) over a Ni-based commercial catalyst in a packed-bed tubular reactor

Cited by 72 publications

References 35 publications

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts

Study on a Bioethanol Solar Reforming System with the Solar Insolation Fluctuation in Consideration of Heat Chemical Reaction

A simulation study of a bioethanol‐solar‐reforming system for proton‐exchange membrane fuel cell home cogeneration system

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Experimental, kinetic and 2-D reactor modeling for simulation of the production of hydrogen by the catalytic reforming of concentrated crude ethanol (CRCCE) over a Ni-based commercial catalyst in a packed-bed tubular reactor

Cited by 72 publications

References 35 publications

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO2 Catalysts

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO2 Catalysts

Study on a Bioethanol Solar Reforming System with the Solar Insolation Fluctuation in Consideration of Heat Chemical Reaction

A simulation study of a bioethanol‐solar‐reforming system for proton‐exchange membrane fuel cell home cogeneration system

Contact Info

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About

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts

Kinetics and Reactor Modeling of Hydrogen Production from Glycerol via Steam Reforming Process over Ni/CeO₂ Catalysts