Ethanol steam reforming over Rh/CexZr1−xO2 catalysts: Impact of the CO–CO2–CH4 interconversion reactions on the H2 production

Birot, A.; Epron, Florence; Descorme, C.; Duprez, Daniel

doi:10.1016/j.apcatb.2007.10.002

Cited by 84 publications

(51 citation statements)

References 47 publications

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“…For example, the study performed in [48] reported the following outcome (Table 10) on the state of methanation reaction over a Rh catalyst supported on Ceria-Zirconia. Table 9.…”

Section: Esr: Conversion Rates and Steady Statesmentioning

confidence: 99%

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

et al. 2017

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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.

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“…For example, the study performed in [48] reported the following outcome (Table 10) on the state of methanation reaction over a Rh catalyst supported on Ceria-Zirconia. Table 9.…”

Section: Esr: Conversion Rates and Steady Statesmentioning

confidence: 99%

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

et al. 2017

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“…For example, the study performed in [40] reported the following outcome (Table 10) on the state of methanation reaction over a Rh catalyst supported on CeriaZirconia. In the same work, the activity of the catalyst towards the WGS reaction was tested, showing values nearer to the equilibrium ones, but only in certain temperature ranges and with a dependency on the feed composition.…”

Section: = −mentioning

confidence: 99%

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

Tripodi¹,

Compagnoni²,

Martinazzo³

et al. 2017

Preprint

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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.

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“…16 The exclusive use of these alkaline oxides and their mixtures as supports (CeO 2 , ZrO 2 , Ce x Zr 1-x O 2 , and La 2 O 2 ) has been proposed because they favor ethanol dehydrogenation reactions (pathway 3, Figure 1) instead of dehydration. 1,17 However, these alkaline oxides have a low surface area, and it is common to find them supported on oxides with greater surface area (such as SiO 2 ).…”

Section: Ethanol-reforming Catalystsmentioning

confidence: 99%

“…Demand for H 2 from fuel cells will increase considerably in the coming years; however, it is currently produced from a fossil fuel (natural gas). 1 Therefore, it is desirable to incorporate renewable sources for its generation to allow for the development of a sustainable H 2 economy. 2 Reforming alcohols for H 2 production has generated great interest because this technique is based on renewable sources, such as bioethanol, which is currently a widely produced and distributed biofuel.…”

Section: Introductionmentioning

confidence: 99%

Advances in Ethanol Reforming for the Production of Hydrogen

2014

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Catalytic steam reforming of ethanol (SRE) is a promising route for the production of renewable hydrogen (H 2 ). This article reviews the influence of doping supported-catalysts used in SRE on the conversion of ethanol, selectivity for H 2 , and stability during long reaction periods. In addition, promising new technologies such as membrane reactors and electrochemical reforming for performing SRE are presented.

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Ethanol steam reforming over Rh/CexZr1−xO2 catalysts: Impact of the CO–CO2–CH4 interconversion reactions on the H2 production

Cited by 84 publications

References 47 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

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

Advances in Ethanol Reforming for the Production of Hydrogen

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