Rational design of ethanol steam reforming catalyst based on analysis of Ni/La2O3 metal–support interactions

2016 ◽  
Vol 6 (10) ◽  
pp. 3449-3456 ◽  
Author(s):  
Jyong-Yue Liu ◽  
Wei-Nien Su ◽  
John Rick ◽  
Sheng-Chiang Yang ◽  
Chun-Jern Pan ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Rational Design ◽  
Coke Deposition ◽  
Strong Interactions ◽  
Ethanol Steam Reforming ◽  
Methanation Reaction ◽  
Reforming Catalyst ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Ethanol Steam

Ni/La2O3 nanocatalyst with strong interactions, compared to Ni/SiO2, generated higher H2 yield by suppressing the methanation reaction and coke deposition.

Bimetallic Ni–Cu Catalysts for the Low-Temperature Ethanol Steam Reforming: Importance of Metal–Support Interactions

2014 ◽  
Vol 145 (2) ◽  
pp. 549-558 ◽  
Author(s):  
Valentina Nichele ◽  
Michela Signoretto ◽  
Francesco Pinna ◽  
Elena Ghedini ◽  
Matteo Compagnoni ◽  
...  
Keyword(s):  
Low Temperature ◽  
Steam Reforming ◽  
Ethanol Steam Reforming ◽  
Metal Support ◽  
Cu Catalysts ◽  
Metal Support Interactions ◽  
Ethanol Steam

scholarly journals Effect of the surface state on the catalytic performance of a Co/CeO2 ethanol steam-reforming catalyst

2016 ◽  
Vol 340 ◽  
pp. 321-330 ◽  
Author(s):  
Sylwia Turczyniak ◽  
Detre Teschner ◽  
Andrzej Machocki ◽  
Spyridon Zafeiratos
Keyword(s):  
Steam Reforming ◽  
Surface State ◽  
Catalytic Performance ◽  
Ethanol Steam Reforming ◽  
Reforming Catalyst ◽  
Ethanol Steam

scholarly journals Microemulsion vs. Precipitation: Which Is the Best Synthesis of Nickel–Ceria Catalysts for Ethanol Steam Reforming?

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 77
Author(s):  
Cristina Pizzolitto ◽  
Federica Menegazzo ◽  
Elena Ghedini ◽  
Arturo Martínez Arias ◽  
Vicente Cortés Corberán ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Catalyst Deactivation ◽  
Structural Features ◽  
Coke Deposition ◽  
Precipitation Method ◽  
Ethanol Steam Reforming ◽  
Synthesis Methods ◽  
Synthetic Approach ◽  
Lanthanum Doping ◽  
Ethanol Steam

Ethanol steam reforming is one of the most promising ways to produce hydrogen from biomass, and the goal of this research is to investigate robust, selective and active catalysts for this reaction. In particular, this work is focused on the effect of the different ceria support preparation methods on the Ni active phase stabilization. Two synthetic approaches were evaluated: precipitation (with urea) and microemulsion. The effects of lanthanum doping were investigated too. All catalysts were characterized using N2-physisorption, temperature programmed reduction (TPR), XRD and SEM, to understand the influence of the synthetic approach on the morphological and structural features and their relationship with catalytic properties. Two synthesis methods gave strongly different features. Catalysts prepared by precipitation showed higher reducibility (which involves higher oxygen mobility) and a more homogeneous Ni particle size distribution. Catalytic tests (at 500 °C for 5 h using severe Gas Hourly Space Velocity conditions) revealed also different behaviors. Though the initial conversion (near complete) and H2 yield (60%, i.e., 3.6 mol H2/mol ethanol) were the same, the catalyst prepared by microemulsion was deactivated much faster. Similar trends were found for La-promoted supports. Catalyst deactivation was mainly related to coke deposition as was shown by SEM of the used samples. Higher reducibility of the catalysts prepared by the precipitation method led to a decrease in coke deposition rate by facilitating the removal of coke precursors, which made them the more stable catalysts of the reaction.

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.

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