CO2 methanation over Ni/Al hydrotalcite-derived catalyst: Experimental characterization and kinetic study

Marocco, Paolo; Morosanu, Eduard Alexandru; Giglio, Emanuele; Ferrero, Domenico; Mebrahtu, Chalachew; Lanzini, Andrea; Abate, Salvatore; Bensaid, Samir; Perathoner, Siglinda; Santarelli, Massimo; Pirone, Raffaele

doi:10.1016/j.fuel.2018.03.137

Cited by 77 publications

(37 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The parameters of the power-law kinetic model are reported in Table 5. The apparent activation energy of 86.2 kJ/mol is in line with the literature values for nickel-based catalysts [19,26]. The negative exponent of the partial pressure of hydrogen in the reverse water gas shift (RWGS) reaction is reasonable because CO yield diminishes as the H 2 to CO 2 ratio in the feed increases.…”

Section: Kinetic Analysissupporting

confidence: 86%

“…Adsorbed hydrogen, CO and hydroxyls were considered as the most abundant surface intermediates. This kinetic model was readapted from a previous study with the addition of the RWGS reaction with an LHHW derived equation [26].…”

Section: Langmuir-hinshelwood-hougen-watson (Lhhw) Kinetic Modelmentioning

confidence: 99%

“…Since the amount of CO measured during the experimental campaign is not negligible, the kinetic model must account for its formation. The same approach was used for the derivation of the kinetic model is found in the literature [19,26,35].…”

Section: Kinetic Modellingmentioning

confidence: 99%

“…On the other hand, in mechanism b the adsorbed CO is converted in adsorbed carbon in step 4.b and further hydrogenated to methane. Both these mechanisms were successfully used to formulate rate equations that described the CO 2 methanation [19,26,35].…”

Section: Langmuir-hinshelwood-hougen-watson (Lhhw) Modelsmentioning

confidence: 99%

See 3 more Smart Citations

Insights on a Methanation Catalyst Aging Process: Aging Characterization and Kinetic Study

et al. 2020

Self Cite

View full text Add to dashboard Cite

Power to gas systems is one of the most interesting long-term energy storage solutions. As a result of the high exothermicity of the CO2 methanation reaction, the catalyst in the methanation subsystem is subjected to thermal stress. Therefore, the performance of a commercial Ni/Al2O3 catalyst was investigated over a series of 100 hour-long tests and in-process relevant conditions, i.e. 5 bar from 270 to 500 °C. Different characterization techniques were employed to determine the mechanism of the observed performance loss (N2 physisorption, XRD, TPO). The TPO analysis excluded carbon deposition as a possible cause of catalyst aging. The BET analysis evidenced a severe reduction in the total surface area for the catalyst samples tested at higher temperatures. Furthermore, a direct correlation was found between the catalyst activity decline and the drop of the catalyst specific surface. In order to correctly design a reliable methanation reactor, it is essential to have a kinetic model that includes also the aging kinetics. For this purpose, the second set of experiments was carried out, in order to determine the intrinsic kinetics of the catalyst. The kinetic parameters were identified by using nonlinear regression analysis. Finally, a power-law aging model was proposed to consider the performance loss in time.

show abstract

Section: Kinetic Analysissupporting

confidence: 86%

Section: Langmuir-hinshelwood-hougen-watson (Lhhw) Kinetic Modelmentioning

confidence: 99%

Section: Kinetic Modellingmentioning

confidence: 99%

Section: Langmuir-hinshelwood-hougen-watson (Lhhw) Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Insights on a Methanation Catalyst Aging Process: Aging Characterization and Kinetic Study

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…P2G systems can rapidly change their working set point, Polymer Electrolyte Membrane (PEM) electrolyzer can be completely ramped up and down (0÷100% range) in just a few seconds [10]. In order to make the hydrogen react with CO2 and produce SNG, the methanizer must be kept at the working temperature [44,45] and, for simplicity reasons, it was here considered that the methanizer is kept at the correct temperature during operation of the plant with no additional cost or energy consumption. The time step used in this analysis is one hour, and for this reason the P2G ramp constraint is negligible.…”

Section: P2g Flexibility and The Objective Functionmentioning

confidence: 99%

A Decision Support System Tool to Manage the Flexibility in Renewable Energy-Based Power Systems

et al. 2019

View full text Add to dashboard Cite

Renewable Energy Sources (RES) have taken on an increasingly important role in the energy mix in the last few years, and it has been forecasted that this trend will continue in the future. The energy production from these sources is not dispatchable, and the increasing penetration of RES in energy mixes may therefore lead to a progressive loss of generation control and predictability. It has become clear that, to reach higher RES penetration levels, it is essential to increase power system flexibility in order to ensure stable operations are maintained. An ICT (Information and Communication Technology) tool that may be used to manage and optimize the flexibility offered by energy storage and conversion systems is described in this paper with specific reference to the Decision Support System (DSS) developed within the H2020 PLANET (PLAnning and operational tools for optimizing energy flows and synergies between energy NETworks) project. The paper focuses on how the PLANET DSS tool evaluates, manages, and dispatches the flexibility of Power to Gas/Heat (P2X) technologies. Moreover, the tool has been used to analyze a realistic case in order to show how the PLANET DSS tool could be used to evaluate the energy and economic benefits of taking advantage of the flexibility of P2X technologies.Energies 2020, 13, 153 2 of 16 allow flexibility to be increased thanks to interconnections between energy sectors [12,13]. Moreover, energy systems are becoming more and more costumer centric, and in this context it becomes very important to be able to define appropriate systems of measurement and prediction of energy flows [14] in order to be able to analyze the flexibility potential within energy systems.In these scenarios, energy flows within energy systems are somewhat complicated and intricate, due to the interconnection of different energy networks and the increase in stochasticity resulting from distributed generation. For this reason, it is important to have computer simulation tools available to analyze these interconnected energy flows and to evaluate the energy and economic impact of different technologies and regulations on the entire system [15,16].A specific ICT DSS tool has been proposed by The EU-Funded H2020 PLANET project [17] to analyze and optimize the flexibility of P2X energy conversion technologies. The project provides an ICT platform to support network operators/planners, P2X plant managers, load aggregators, and policy makers in order to increase the integration of renewables.Several software programs are available in the literature to simulate energy flows in a Multi Energy System (MES) [16,18,19]. The main advantage of using the PLANET DSS lies in the fact that the tool is built on a web platform: through the web platform, the users can setup and execute a remote simulation, and in this way the various actors can benefit from using a dedicated super-computer for their simulation, to which they would otherwise not have access. Moreover, due to middleware-based communication, Demand-Response (DR) signals ...

show abstract

The Influence of the Support Nature and the Metal Precursor in the Activity of Pd‐based Catalysts for the Bromate Reduction Reaction

et al. 2021

View full text Add to dashboard Cite

Palladium catalysts supported on different materials (alumina, activated carbon and mixed oxide derived from hydrotalcite) and prepared with different metal precursors (nitrate, chloride and acetate) have been characterized and tested for the bromate reduction reaction. The catalytic behavior depends on the support nature and on the metallic precursor used for the catalyst preparation. Pd catalyst supported on a mixed oxide has a low activity due to the high affinity of the reconstructed support for the Br− formed, preventing the reactants to approximate the active Pd sites. Pd catalyst supported on activated carbon has a surface negative charge and a microporous structure, making difficult the interaction of the active sites with the reactants. The best results are obtained with the catalyst supported on alumina due to its physical‐chemical properties, i. e. mesoporosity, positive surface charge and reversible adsorption of reactants and products. These characteristics make easy bromate and H2 adsorption on the active sites and subsequent reaction, thus resulting in a better activity. The Pd precursor salt also influences the catalytic activity as it has an effect on the Pd nanocrystal size. The best results are obtained with the metal precursor that produces homogeneous and large Pd metallic crystallites.

show abstract

CO2 methanation over Ni/Al hydrotalcite-derived catalyst: Experimental characterization and kinetic study

Cited by 77 publications

References 25 publications

Insights on a Methanation Catalyst Aging Process: Aging Characterization and Kinetic Study

Insights on a Methanation Catalyst Aging Process: Aging Characterization and Kinetic Study

A Decision Support System Tool to Manage the Flexibility in Renewable Energy-Based Power Systems

The Influence of the Support Nature and the Metal Precursor in the Activity of Pd‐based Catalysts for the Bromate Reduction Reaction

Contact Info

Product

Resources

About