Durable ethanol steam reforming in a catalytic membrane reactor at moderate temperature over cobalt hydrotalcite

Espinal, Raúl; Anzola, Andrés; Adrover, E.; Roig, María; Chimentão, R.J.; Medina, Francisco; López, Eduardo; Borio, Daniel Oscar; Llorca, Jordi

doi:10.1016/j.ijhydene.2014.05.127

Cited by 42 publications

(26 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides Ni-based catalysts, various transition metals have been also tested for ESR, with Co-based catalysts being among the most efficient [34][35][36][37][38][39][40][41][42][43][44][45][46]. In particular, Co/Mg/Al hydrotalcites are very active and stable for ESR, due to the formation of highly reactive Co 2+ species instead of less active metallic cobalt [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

et al. 2016

View full text Add to dashboard Cite

Abstract:The aim of the present work was to investigate steam reforming of ethanol with regard to H 2 production over transition metal catalysts supported on CeO 2 . Various parameters concerning the effect of temperature (400-800˝C), steam-to-carbon (S/C) feed ratio (0.5, 1.5, 3, 6), metal entity (Fe, Co, Ni, Cu) and metal loading (15-30 wt.%) on the catalytic performance, were thoroughly studied. The optimal performance was obtained for the 20 wt.% Co/CeO 2 catalyst, achieving a H 2 yield of up to 66% at 400˝C. In addition, the Co/CeO 2 catalyst demonstrated excellent stability performance in the whole examined temperature range of 400-800˝C. In contrast, a notable stability degradation, especially at low temperatures, was observed for Ni-, Cu-, and Fe-based catalysts, ascribed mainly to carbon deposition. An extensive characterization study, involving N 2 adsorption-desorption (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM/EDS), X-ray Photoelectron Spectroscopy (XPS), and Temperature Programmed Reduction (H 2 -TPR) was undertaken to gain insight into the structure-activity correlation. The excellent reforming performance of Co/CeO 2 catalysts could be attributed to their intrinsic reactivity towards ethanol reforming in combination to their high surface oxygen concentration, which hinders the deposition of carbonaceous species.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The Ethanol Steam Reformer with membrane separation stage modeled in this work corresponds to a laboratory real system like the one showed in Figure 1 [5]. The upper part corresponds to the reforming stage and the lower part corresponds to the separation stage.…”

Section: A Physical Descriptionmentioning

confidence: 99%

“…where k ∞ j are the pre-exponential factors, k j are the kinetic constants, k W GS is the water gas shift kinetic constant and E a j [ J mol ] are the activation energies of each reaction, given in [5].…”

Section: A Mass Balancementioning

confidence: 99%

“…The operating range of validity of the simulation model is: pressure from 1 to 14 bar, furnace temperature from 773.15 to 873.15 K and steam to carbon input ratio (S/C) from 1.8 to 3 [5]. Results shown in this section correspond to an operating point at 4 bar, 813.15 K temperature and S/C equal to 3.…”

Section: Modeling Analysismentioning

confidence: 99%

“…This work is based on a nonlinear one-dimensional dynamic model that corresponds to a real system which integrates the reforming stage and the separation stage into a single shell [4], [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonlinear Model Predictive Control for hydrogen production in an Ethanol Steam Reformer with membrane separation

Contreras

Prat

Ocampo‐Martínez

et al. 2016

2016 IEEE Conference on Control Applications (CCA)

View full text Add to dashboard Cite

Abstract-This paper presents a new Nonlinear Model Predictive Control (NMPC) design for an Ethanol Steam Reformer with Pd-Ag membrane separation stage. The reformer is used to produce pure hydrogen able to feed a Proton Exchange Membrane Fuel Cell. Mass and energy balances are used to obtain the nonlinear dynamic model of both the reforming and the separation stages. Constraints, system nonlinearities and flexible cost function are the main reasons to select an NMPC controller, which is tested against the ordinary differential equations as simulation model, and has an internal model based on the sample data technique.

show abstract

Hydrogen Production from Oxygenated Hydrocarbons: Review of Catalyst Development, Reaction Mechanism and Reactor Modeling

Mohamedali

Henni

Ibrahim

2017

Hydrogen Production Technologies

View full text Add to dashboard Cite

Durable ethanol steam reforming in a catalytic membrane reactor at moderate temperature over cobalt hydrotalcite

Cited by 42 publications

References 61 publications

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

Nonlinear Model Predictive Control for hydrogen production in an Ethanol Steam Reformer with membrane separation

Hydrogen Production from Oxygenated Hydrocarbons: Review of Catalyst Development, Reaction Mechanism and Reactor Modeling

Contact Info

Product

Resources

About