An ab initio thermodynamics study of cobalt surface phases under ethanol steam reforming conditions

2014 ◽  
Vol 4 (9) ◽  
pp. 3379-3389 ◽  
Author(s):  
Wenjia Luo ◽  
Aravind Asthagiri
Keyword(s):  
Ab Initio ◽  
Surface Structure ◽  
Steam Reforming ◽  
Structure Evolution ◽  
Ethanol Steam Reforming ◽  
Surface Phases ◽  
Atomistic Thermodynamics ◽  
Ethanol Steam

A combination of DFT and ab initio atomistic thermodynamics study illustrated the surface structure evolution of Co0/Co2+ catalysts under ethanol steam reforming conditions.

scholarly journals Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 332
Author(s):  
Ludmilla Bobrova ◽  
Nikita Eremeev ◽  
Nadezhda Vernikovskaya ◽  
Vladislav Sadykov ◽  
Oleg Smorygo
Keyword(s):  
Steam Reforming ◽  
Transport Model ◽  
Hydrogen Permeation ◽  
Ethanol Steam Reforming ◽  
Clear Understanding ◽  
Catalytic Membrane ◽  
Structure Property ◽  
Asymmetric Membrane ◽  
Supported Membrane ◽  
Ethanol Steam

The performance of catalytic membrane reactors (CMRs) depends on the specific details of interactions at different levels between catalytic and separation parts. A clear understanding of decisive factors affecting their operational parameters can be provided via mathematical simulations. In the present paper, main results of numerical studies of ethanol steam reforming, followed by downstream hydrogen permeation through an asymmetric supported membrane, are reported. The membrane module consists of a thin selective layer supported on a substrate with graded porous structure. One-dimensional isothermal reaction–transport model for the CMR has been developed, and its validation has been carried out by using performance data from a lab-scale reactor with a disk-shaped membrane. Simulations demonstrate the model’s capabilities to analyze local concentrations gradients, as required to provide accurate estimates of the relationship between structure–property–performance. It was shown that transport properties of multilayer asymmetric membranes are highly related to the structural properties of each single layer.

scholarly journals Effects of LHSV and Reaction Temperature upon Ethanol-Steam-Reforming Performance

2012 ◽  
Vol 78 (787) ◽  
pp. 415-419 ◽  
Author(s):  
Toshio SHINOKI ◽  
Tsuyoshi MAEDA ◽  
Jiro FUNAKI ◽  
Katsuya HIRATA
Keyword(s):  
Reaction Temperature ◽  
Steam Reforming ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

Hydrogen Production from Ethanol Steam Reforming: Fixed Bed Reactor Design

2008 ◽  
Vol 6 (1) ◽  
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.

H2-production from CO2-assisted ethanol steam reforming: The regeneration of Ni-based catalysts

2015 ◽  
Vol 40 (15) ◽  
pp. 5256-5263 ◽  
Author(s):  
Lukasz Bednarczuk ◽  
Pilar Ramírez de la Piscina ◽  
Narcís Homs
Keyword(s):  
Steam Reforming ◽  
H2 Production ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

Ethanol Steam Reforming by Ni Catalysts for H2 Production: Evaluation of Gd Effect in CeO2 Support

2022 ◽  
Author(s):  
Gabriella R. Ferreira ◽  
Francisco G. E. Nogueira ◽  
Alessandra F. Lucrédio ◽  
Elisabete M. Assaf
Keyword(s):  
Steam Reforming ◽  
H2 Production ◽  
Ethanol Steam Reforming ◽  
Ni Catalysts ◽  
Ethanol Steam

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

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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