Ethanol reforming for hydrogen production in a hybrid electric vehicle: process optimisation

Klouz, V; Fierro, Vanessa; Denton, Patricia; Katz, H.; Lisse, Jean-Pierre; Bouvot-Mauduit, S; Mirodatos, C.

doi:10.1016/s0378-7753(01)00922-3

Cited by 197 publications

(92 citation statements)

References 31 publications

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“…(1), the complete reaction scheme is far more complex, obtaining not only H 2 and CO 2 , but also CO, CH 4 , and, in some cases, acetaldehyde and ethylene [4]. As a consequence, in addition to high activity to attain the greatest conversion possible, high hydrogen selectivity is needed to avoid the formation of undesirable sub products which may result in carbon formation [5,6].…”

Section: Bioethanol Steam Reformingmentioning

confidence: 99%

Hydrogen Production from Bioethanol: Behavior of a Carbon Oxide Preferential Oxidation Catalyst

et al. 2017

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Hydrogen is recognized as a promising green energy source, particularly when used to feed a polymer electrolyte membrane fuel cell (PEMFC). Here, hydrogen was obtained by bioethanol steam reforming with CO and CO 2 as primary sub products. Since the cell anode is extremely sensitive to poisoning with CO, watergas shift (WGS) and carbon oxide preferential oxidation (COPROX) reactors were employed for hydrogen purification. Catalysts prepared by our lab were tested at pilot plant scale in both the reformer and COPROX unit, where different active phase distributions, stoichiometric excess of air, and reaction temperatures were tested. The use of two different COPROX units with intermediate air injection was also considered. The as-prepared catalysts showed good stability and performance.

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Section: Bioethanol Steam Reformingmentioning

confidence: 99%

Hydrogen Production from Bioethanol: Behavior of a Carbon Oxide Preferential Oxidation Catalyst

et al. 2017

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“…Особенно это касается слу-чая с использованием катализатора с носителем SiO 2 , где соотношение концентраций водорода и метана равно 2. В работе [10] приведены величины констант равновесия реакций моноокиси углерода и метана с водой. Из этих данных можно сделать вывод, что оптимальной для протекания шифт-реакции (3) явля-ется низкая температура (200 °С), но и в исследован-ном в данной работе интервале температур равнове-сие этой реакции смещено в сторону образования водорода.…”

Section: результаты и обсуждениеunclassified

“…К настоящему времени выполнено множество ра-бот по изучению процесса конверсии этанола в газо-вую смесь, богатую водородом [1][2][3][4][5][6][7][8][9][10][11]. Как правило, в смеси, кроме водорода, наблюдается присутствие метана, моноокиси и двуокиси углерода, а также не-прореагировавший этанол, вода и ацетальдегид.…”

Section: Introductionunclassified

A Catalyst Supporter to Lower the Carbon Monoxide Content in Ethanol Reforming

Васильевич¹,

Сергеевич²,

Васильевич³

et al. 2016

Alʹtern. ènerg. èkol.

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“…Unlike hydrocarbons, ethanol is easier to reform and is also free of sulfur, which is a catalyst poison in the reforming of hydrocarbons [6]. Also, unlike methanol, which is produced from hydrocarbons and has a relatively high toxicity, ethanol is completely biomass-based and has low toxicity and as such it provides less risk to the population [7]. The fact that methanol is derived from fossil fuel resources also renders it an unreliable energy source in the long run.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Ethanol Steam Reforming System for Hydrogen Production

Davidy¹

2018

ChemEngineering

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Hydrogen could be a promising source fuel, and is often considered as a clean energy carrier as it can be produced by ethanol. The use of ethanol presents several advantages, because it is a renewable feedstock, easy to transport, biodegradable, has low toxicity, contains high hydrogen content, and easy to store and handle. Reforming ethanol steam occurs at relatively lower temperatures, compared with other hydrocarbon fuels, and has been widely studied due to the high yield provided for the formation of hydrogen. A new computational fluid dynamics (CFD) simulation model of the ethanol steam reforming (ESR) has been developed in this work. The reforming system model is composed from an ethanol burner and a catalytic bed reactor. The liquid ethanol is burned inside the firebox, then the radiative heat flux from burner is transferred to the catalytic bed reactor for transforming the ethanol steam mixture to hydrogen and carbon dioxide. The proposed computational model is composed of two phases-Simulation of ethanol burner by using Fire Dynamics Simulator software (FDS) (version 5.0) and a multi-physics simulation of the steam reforming process occurring inside the reformer. COMSOL multi-physics software (version 4.3b) has been applied in this work. It solves simultaneously the fluid flow, heat transfer, diffusion with chemical reaction kinetics equations, and structural analysis. It is shown that the heat release rate produced by the ethanol burner, can provide the necessary heat flux required for maintaining the reforming process. It has been found out that the mass fractions of the hydrogen and carbon dioxide mass fraction are increased along the reformer axis. The hydrogen mass fraction increases with enhancing the radiation heat flux. It was shown that Von Mises stresses increases with heat fluxes. Safety issues concerning the structural integrity of the steel jacket are also addressed. This work clearly shows that by using ethanol which has low temperature conversion, the decrease in structural strength of the steel tube is low. The numerical results clearly indicate that under normal conditions of the ethanol reforming (The temperature of the steel is about 600 • C or 1112 • F), the rupture time of the HK-40 steel alloy increases considerably. For this case the rupture time is greater than 100,000 h (more than 11.4 years).

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Ethanol reforming for hydrogen production in a hybrid electric vehicle: process optimisation

Cited by 197 publications

References 31 publications

Hydrogen Production from Bioethanol: Behavior of a Carbon Oxide Preferential Oxidation Catalyst

Hydrogen Production from Bioethanol: Behavior of a Carbon Oxide Preferential Oxidation Catalyst

A Catalyst Supporter to Lower the Carbon Monoxide Content in Ethanol Reforming

CFD Simulation of Ethanol Steam Reforming System for Hydrogen Production

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