Kinetic and process study for ethanol reforming using a Rh/Pt washcoated monolith catalyst

Simson, Amanda; Waterman, Earl M.; Farrauto, Robert J.; Castaldi, Marco J.

doi:10.1016/j.apcatb.2008.11.031

Cited by 35 publications

(29 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…requires it. Without going into the details of this wider research field, we briefly account for at least three interesting aspects: (i) the intrinsic mass and heat transfer limitations of wall-coated microchannel reactors [56][57][58]; (ii) the time on stream-dependent kinetics due to the (relatively) slow and selective adsorption/release of a species [59,60]; (iii) the former phenomenon described in nonideal reactors characterized by temperature as well as pressure gradients [61,62]. We conclude this section on the experimental kinetics addressing also a couple of studies on the oxidative reforming of ethanol.…”

Section: Esr: From Chemical Bonds To Hydrogenmentioning

confidence: 99%

Process Simulation for the Design and Scale Up of Heterogeneous Catalytic Process: Kinetic Modelling Issues

et al. 2017

View full text Add to dashboard Cite

Abstract:Process simulation represents an important tool for plant design and optimization, either applied to well established or to newly developed processes. Suitable thermodynamic packages should be selected in order to properly describe the behavior of reactors and unit operations and to precisely define phase equilibria. Moreover, a detailed and representative kinetic scheme should be available to predict correctly the dependence of the process on its main variables. This review points out some models and methods for kinetic analysis specifically applied to the simulation of catalytic processes, as a basis for process design and optimization. Attention is paid also to microkinetic modelling and to the methods based on first principles, to elucidate mechanisms and independently calculate thermodynamic and kinetic parameters. Different case studies support the discussion. At first, we have selected two basic examples from the industrial chemistry practice, e.g., ammonia and methanol synthesis, which may be described through a relatively simple reaction pathway and the relative available kinetic scheme. Then, a more complex reaction network is deeply discussed to define the conversion of bioethanol into syngas/hydrogen or into building blocks, such as ethylene. In this case, lumped kinetic schemes completely fail the description of process behavior. Thus, in this case, more detailed-e.g., microkinetic-schemes should be available to implement into the simulator. However, the correct definition of all the kinetic data when complex microkinetic mechanisms are used, often leads to unreliable, highly correlated parameters. In such cases, greater effort to independently estimate some relevant kinetic/thermodynamic data through Density Functional Theory (DFT)/ab initio methods may be helpful to improve process description.

show abstract

Section: Esr: From Chemical Bonds To Hydrogenmentioning

confidence: 99%

Process Simulation for the Design and Scale Up of Heterogeneous Catalytic Process: Kinetic Modelling Issues

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Despite a broad and growing literature mainly focusing on catalyst formulation [6][7][8][9][10][11], only a few reports on fuel processors, and even fewer on integrated systems can be found in the literature. Possible system layouts for the reforming of biomass-derived fuels have been recently reviewed [12,13].…”

Section: -Introductionmentioning

confidence: 99%

5kWe+5kWt reformer-PEMFC energy generator from bioethanol first data on the fuel processor from a demonstrative project

Rossetti

Biffi

Tantardini

et al. 2012

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

A power unit constituted by a reformer section, a H2 purification section and a fuel cell stack is being tested c/o the Dept. of Physical Chemistry and Electrochemistry of Università degli Studi di Milano, on the basis of a collaboration with HELBIO S.A. Hydrogen and Energy Production Systems, Patras (Greece), supplier of the unit, and some sponsors (Linea Energia S.p.A., Parco Tecnologico Padano and Provincia di Lodi, Italy). The system size allows to cogenerate 5 kWe (220 V, 50 Hz a.c.) + 5 kWt (hot water at 65°C) as peak output. Bioethanol, obtainable by different non-food-competitive biomass, is transformed into syngas by a prereforming and reforming reactors couple and the reformate is purified from CO to a concentration below 20 ppmv, suitable to feed a proton exchange membrane fuel cell (PEMFC) stack that will be integrated in the fuel processor in a second step of the experimentation. This result is achieved by feeding the reformate to two water gas shift reactors, connected in series and operating at high and low temperature, respectively. CO

show abstract

“…The correct modeling of these latter kinetics requires the implementation of PDE systems for every mass transport mechanism and possible heat transfers, if the foreseen system requires it. Without going into the details of this wider research field, we briefly account for at least three interesting aspects: i) the intrinsic mass and heat transfer limitations of wall-coated microchannel reactors [48][49][50]; ii) the time on stream-dependent kinetics due to the (relatively) slow and selective adsorption/release of a species [51,52]; iii) the former phenomenon described in nonideal reactors characterised by temperature as well as pressure gradients [53,54].…”

Section: -Other Reforming Modelsmentioning

confidence: 99%

Kinetic Modelling at the Basis of Process Simulation for Heterogeneous Catalytic Process Design

Tripodi¹,

Compagnoni²,

Martinazzo³

et al. 2017

Preprint

View full text Add to dashboard Cite

Process simulation represents an important tool for plant design and optimisation, either applied to well established or to newly developed processes. Suitable thermodynamic packages should be selected in order to properly describe the behaviour of reactors and unit operations and to precisely define phase equilibria. Moreover, a detailed and representative kinetic scheme should be available to predict correctly the dependence of the process on its main variables. This review points out some models and methods for kinetic analysis specifically applied to the simulation of catalytic processes, as a basis for process design and optimisation. Attention is paid also to microkinetic modelling and to the methods based on first principles, to elucidate mechanisms and calculate thermodynamic and kinetic parameters. Different case histories support the discussion. At first, we have selected two basic examples from the industrial chemistry practice, e.g. ammonia and methanol synthesis, which may be described through a relatively simple reaction pathway. Then, a more complex reaction network is deeply discussed to define the conversion of bioethanol into syngas/hydrogen or into building blocks, such as ethylene.

show abstract

Kinetic and process study for ethanol reforming using a Rh/Pt washcoated monolith catalyst

Cited by 35 publications

References 23 publications

Process Simulation for the Design and Scale Up of Heterogeneous Catalytic Process: Kinetic Modelling Issues

Process Simulation for the Design and Scale Up of Heterogeneous Catalytic Process: Kinetic Modelling Issues

5kWe+5kWt reformer-PEMFC energy generator from bioethanol first data on the fuel processor from a demonstrative project

Kinetic Modelling at the Basis of Process Simulation for Heterogeneous Catalytic Process Design

Contact Info

Product

Resources

About