Reaction pathway for ethanol steam reforming on a Ni/SiO 2 catalyst including coke formation

2014 ◽  
Vol 39 (33) ◽  
pp. 18820-18834 ◽  
Author(s):  
Jorge Vicente ◽  
Javier Ereña ◽  
Carolina Montero ◽  
Miren J. Azkoiti ◽  
Javier Bilbao ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Reaction Pathway ◽  
Coke Formation ◽  
Ethanol Steam Reforming ◽  
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...

scholarly journals Controlled Selectivity for Ethanol Steam Reforming Reaction over Doped CeO2 Surfaces: The Role of Gallium

2020 ◽  
Author(s):  
Julia Vecchietti ◽  
Pablo Lustemberg ◽  
Esteban L. Fornero ◽  
Monica Calatayud ◽  
Sebastián E. Collins ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Density Functional ◽  
Coke Formation ◽  
Product Distribution ◽  
Ethanol Steam Reforming ◽  
Standing Up ◽  
Drastic Effect ◽  
Decomposition Pathway ◽  
Ethanol Steam

The ethanol steam reforming reaction, together with the adsorption and decomposition of ethanol was studied on CeO2 and gallium-doped ceria (CeGaOx) by a combined experimental and theoretical approach using infrared spectroscopy (IR), mass spectrometry (MS) and density functional theory (DFT) calculations. At 100°C, different types of monodentate ethoxy species were identified as standing-up (SU) on Ce4+ and lying-down (LD) on Ce4+ and Ga3+, with the alkyl chain more perpendicular or parallel to the surface, respectively. It is suggested that the incorporation of Ga into the ceria lattice changes the decomposition pathway of LD species, which converts to acetate instead of ethylene, attributed to the increased lattice oxygen lability in the Ce-O-Ga interface upon doping and the propensity to form Ga-H surface species. Under ethanol steam reforming conditions, Ga doping of ceria-based materials has a drastic effect by improving the H2:CO2 ratio, changing the product distribution and reducing coke formation.

Ni/ZrO2 catalysts in ethanol steam reforming: Inhibition of coke formation by CaO-doping

2014 ◽  
Vol 150-151 ◽  
pp. 12-20 ◽  
Author(s):  
Valentina Nichele ◽  
Michela Signoretto ◽  
Francesco Pinna ◽  
Federica Menegazzo ◽  
Ilenia Rossetti ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Coke Formation ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

scholarly journals Controlled Selectivity for Ethanol Steam Reforming Reaction over Doped CeO2 Surfaces: The Role of Gallium

2020 ◽  
Author(s):  
Julia Vecchietti ◽  
Pablo Lustemberg ◽  
Esteban L. Fornero ◽  
Monica Calatayud ◽  
Sebastián E. Collins ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Density Functional ◽  
Coke Formation ◽  
Product Distribution ◽  
Ethanol Steam Reforming ◽  
Standing Up ◽  
Drastic Effect ◽  
Decomposition Pathway ◽  
Ethanol Steam

The ethanol steam reforming reaction, together with the adsorption and decomposition of ethanol was studied on CeO2 and gallium-doped ceria (CeGaOx) by a combined experimental and theoretical approach using infrared spectroscopy (IR), mass spectrometry (MS) and density functional theory (DFT) calculations. At 100°C, different types of monodentate ethoxy species were identified as standing-up (SU) on Ce4+ and lying-down (LD) on Ce4+ and Ga3+, with the alkyl chain more perpendicular or parallel to the surface, respectively. It is suggested that the incorporation of Ga into the ceria lattice changes the decomposition pathway of LD species, which converts to acetate instead of ethylene, attributed to the increased lattice oxygen lability in the Ce-O-Ga interface upon doping and the propensity to form Ga-H surface species. Under ethanol steam reforming conditions, Ga doping of ceria-based materials has a drastic effect by improving the H2:CO2 ratio, changing the product distribution and reducing coke formation.

scholarly journals Mechanistic Insights of Ethanol Steam Reforming over Ni–CeOx(111): The Importance of Hydroxyl Groups for Suppressing Coke Formation

2015 ◽  
Vol 119 (32) ◽  
pp. 18248-18256 ◽  
Author(s):  
Zongyuan Liu ◽  
Tomáš Duchoň ◽  
Huanru Wang ◽  
Erik W. Peterson ◽  
Yinghui Zhou ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Coke Formation ◽  
Ethanol Steam Reforming ◽  
Hydroxyl Groups ◽  
Ethanol Steam

Improved ethanol steam reforming on Rh/Al2O3 catalysts doped with CeO2 or/and La2O3: Influence in reaction pathways including coke formation

2015 ◽  
Vol 505 ◽  
pp. 159-172 ◽  
Author(s):  
Paula Osorio-Vargas ◽  
Cristian H. Campos ◽  
Rufino M. Navarro ◽  
Jose L.G. Fierro ◽  
Patricio Reyes
Keyword(s):  
Steam Reforming ◽  
Coke Formation ◽  
Reaction Pathways ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

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
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