A review on mechanistic kinetic models of ethanol steam reforming for hydrogen production using a fixed bed reactor

Hydrogen production by ethanol steam reforming over Ni-Cu/ZnO catalyst in the temperatures range of 250-550°C was studied on a fixed bed reactor. The effects of reaction temperature and water/ethanol molar ratio on hydrogen production were investigated. The structure and surface characteristics of the catalyst were measured by scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential thermal analyzer (TG-DSC). The results show that the Ni-Cu/ZnO catalyst has good catalytic performance with higher hydrogen yield of 4.87molH2/molEtOH reacted. A comparison of hydrogen production from ethanol steam reforming over Ni-Cu/ZnO catalyst with over a commercial catalyst was made in this paper.

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Hydrogen Production from Ethanol Steam Reforming: Fixed Bed Reactor Design

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1582 ◽

2008 ◽

Vol 6 (1) ◽

Cited By ~ 2

Author(s):

Pablo Giunta ◽

Norma Amadeo ◽

Miguel Laborde

Keyword(s):

Steam Reforming ◽

Flow Model ◽

Multicomponent Mixture ◽

Plug Flow ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Ethanol Steam Reforming ◽

Heterogeneous Model ◽

Ethanol Steam ◽

Hydrogen Stream

The aim of this work is to design an ethanol steam reformer to produce a hydrogen stream capable of feeding a 60 kW PEM fuel cell applying the plug flow model, considering the presence of the catalyst bed (heterogeneous model). The Dusty-Gas Model is employed for the catalyst, since it better predicts the fluxes of a multicomponent mixture. Moreover, this model has shown to be computationally more robust than the Fickian Model. A power law-type kinetics was used. Results showed that it is possible to carry out the ethanol steam reforming in a compact device (1.66 x 10 -5 to 5.27 x 10 -5 m3). It was also observed that this process is determined by heat transfer.

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Sorption-Enhanced Ethanol Steam Reforming Process in a Fixed-Bed Reactor

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.8b01657 ◽

2018 ◽

Vol 57 (34) ◽

pp. 11547-11553 ◽

Cited By ~ 8

Author(s):

R. Belén Menendez ◽

Cecilia Graschinsky ◽

Norma E. Amadeo

Keyword(s):

Steam Reforming ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Ethanol Steam Reforming ◽

Ethanol Steam

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Production of Hydrogen from Ethanol Using Pt/Hydrotalcite Catalysts Stabilized with Tungsten Oxides

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v15i3.68 ◽

2012 ◽

Vol 15 (3) ◽

pp. 215-223 ◽

Cited By ~ 3

Author(s):

J.L. Contreras ◽

M.A. Ortiz ◽

R. Luna ◽

G.A. Fuentes ◽

M. Autié ◽

...

Keyword(s):

Crystal Structure ◽

Steam Reforming ◽

Fixed Bed ◽

Thermal Stabilization ◽

Fixed Bed Reactor ◽

Ethanol Steam Reforming ◽

Vis Spectroscopy ◽

Production Of Hydrogen ◽

Stabilization Effect ◽

Ethanol Steam

An stabilization effect of WOx over the Pt/hydrotalcite catalysts to produce H2 by ethanol steam reforming at low concentration was studied. The catalysts were characterized by N2 physisorption, X-ray diffraction, Infrared (IR), and UV-vis spectroscopy. The catalytic tests were made in a fixed bed reactor. The catalysts showed porous with the shape of parallel layers with a monomodal mesoporous distribution. By IR spectroscopy it was found superficial chemical such as: -OH, H2O, Al-OH, Mg-OH, and CO32-. The reaction products were; H2, CO2, CH3CHO, CH4 and C2H4. These catalysts did not produce CO and showed low selectivity to C2H4. By XRD we found that catalysts having Pt and the lowest W concentration showed the highest crystallinity and the highest stability during the reaction of ethanol steam reforming. A possible thermal stabilization effect of W in the hydrotalcite crystal structure leading to prevent the Pt sintering is proposed. By IR the hydrotalcite hydroxil groups coordinated with Mg and Al decreased by the presence of WOx. We found that catalysts with low W concentration and Pt having high crystallinity showed the highest stability after ethanol steam reforming. It could be a possible thermal stabilization effect of W in the hydrotalcite crystal structure leading to prevent the Pt sintering.

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Hydrogen Production by Ethanol Steam Reforming Over Cu and Ni Catalysts Supported on ZrO2 and Al2O3 Microspheres

Materials Science Forum ◽

10.4028/www.scientific.net/msf.591-593.734 ◽

2008 ◽

Vol 591-593 ◽

pp. 734-739 ◽

Cited By ~ 3

Author(s):

V.S. Bergamaschi ◽

F.M.S. Carvalho

Keyword(s):

Steam Reforming ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Feed Ratio ◽

Ni Catalyst ◽

Ethanol Conversion ◽

Ethanol Steam Reforming ◽

Hydrolysis Method ◽

Steam Reforming Of Ethanol ◽

Ethanol Steam

Ethanol reforming process to produce hydrogen rich-gas stream is performed using Cu/Ni catalyst supported on zirconia and alumina microspheres prepared by hydrolysis method. Theses catalysts were tested in a fixed-bed reactor system employing steam reforming of ethanol. The operating temperature was 550°C and water/ethanol feed ratio 3/1. Although all catalysts were very active for ethanol conversion and very selective towards the desired products, but that one supported on zirconia microspheres was produced slightly better results. The data reveal high activity of the Cu/Ni/ZrO2 catalyst for ethanol steam reforming and presented a good selectivity for H2.

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Ethanol Steam Reforming on Rh: Microkinetic Analyses on the Complex Reaction Network

Catalysis Science & Technology ◽

10.1039/d1cy01202a ◽

2021 ◽

Author(s):

Tangjie Gu ◽

Wen Zhu ◽

Bo Yang

Keyword(s):

Hydrogen Production ◽

Steam Reforming ◽

Reaction Pathway ◽

Reaction Network ◽

Ethanol Steam Reforming ◽

Complex Reaction ◽

Ethanol Steam

Ethanol steam reforming is one of the most widely used processes for hydrogen production, but the mechanism of the whole reaction pathway from ethanol to CO and CO2 has not...

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