Investigations on the Low Temperature Methanation with Pulse Reaction of CO

Friedland, Jens; Turek, Thomas; Güttel, Robert

doi:10.1002/cite.201600056

Cited by 11 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the aim to reduce the costs of the hydrogen storage by minimizing upstream storage capacities (up to 8% of the total investment costs can be saved), the unsteady‐state operation of the exothermic methanation reaction is demanded. However, the occurring phenomena and operation strategies under dynamic conditions are not exhaustively addressed in scientific literature thus far, but receive more attention in recent years . One promising approach is adiabatically operated fixed‐bed reactors, which show a good partial and excess load behavior, since the chemical equilibrium is reached within the residence time.…”

Section: Introductionmentioning

confidence: 99%

Transient Flow Rate Ramps for Methanation of Carbon Dioxide in an Adiabatic Fixed‐Bed Recycle Reactor

2019

Self Cite

View full text Add to dashboard Cite

The power‐to‐gas (PtG) process, enabling the long‐term indirect storage of electrical energy, includes the water electrolysis for hydrogen production and the subsequent hydrogenation of carbon dioxide in a methanation reactor. The dynamic operation of methanation reactors is favored to limit upstream storage capacities, but not fully understood thus far. Therefore, this contribution investigates the dynamic operation of a fixed‐bed recycle reactor during flow rate ramps with a variation of the ramp time. Load ramps of the volumetric flow rate lead to global maxima during the transition; for the methane content if the flow rate is decreased, and for the gas temperature if the flow rate is increased. Furthermore, the adaptation of the product recirculation during flow rate ramps is discussed at the end. The recycle ratio turns out to provide an additional degree of freedom for stabilizing the reactor behavior under fluctuating feed conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Transient Flow Rate Ramps for Methanation of Carbon Dioxide in an Adiabatic Fixed‐Bed Recycle Reactor

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…An example is the chemical storage of electrical energy via water electrolysis and subsequent methanation, e.g., power‐to‐gas , where the coupling between electrical and chemical engineering can be achieved by simply considering electrons as reactants during electrolysis. Thus, balance equations for the utilization of electrons in chemical reactions can be derived, which can be transformed into TFs and in that way linked to the supply from the electrical grid.…”

Section: Introductionmentioning

confidence: 99%

Transfer Functions for Periodic Reactor Operation: Fundamental Methodology for Simple Reaction Networks

et al. 2017

Self Cite

View full text Add to dashboard Cite

Dedicated to Professor Rüdiger Lange on the occasion of his 65th birthday A method for frequency response analysis of chemical reactors with periodically modulated inlet concentration is presented and demonstrated for simple firstorder irreversible consecutive and parallel as well as reversible reactions applying an isothermal continuous stirred-tank reactor (CSTR). The frequency response of these reaction types is studied by simulations in time and frequency domain, the latter being based on Laplace transformation of the material balance. The results allow for clearly distinguish between the quasi and relaxed steady state as well as the full transient region with impact on designing reactors for dynamic operation. Furthermore, the relation between the dynamic response and the time constants of the system is discussed.

show abstract

“…The RTD of a reactor equipped with porous catalyst pellets is affected by transport processes at both the macro and the meso scale, since dispersion in the convective flow and diffusion in the porous structure contribute to the overall response. Since the RTD of the internal standard (IS) measured in-situ is assumed to be representative [12,19,22], it allows to provide each experimental data set together with the individual residence time behavior. If those transport phenomena are not selective towards certain components, the RTD is identical for all components and is just scaled with a proportional factor according to eq.…”

Section: Implications Of An Internal and External Standardmentioning

confidence: 99%

The Periodic Transient Kinetics Method for Investigation of Kinetic Process Dynamics Under Realistic Conditions: Methanation as an Example

Meyer

Friedland

Schumacher

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Due to rising interest for the integration of chemical energy storage into the electrical power grid, the unsteady-state operation of chemical reactors is gaining more and more attention with emphasis on heterogeneously catalyzed reactions. The transient response of those reactions is influenced by effects on different length scales, ranging from the active surface via the individual porous catalyst particle up to the full-scale reactor. The challenge, however, is to characterize unsteady-state effects under realistic operation conditions and to assign them to distinct transport processes. Therefore, the periodic transient kinetics (PTK) method is introduced, which allows for the separation of kinetic process dynamics at different length scales experimentally under realistic operation conditions. The methodology also provides the capability for statistical analysis of the experimental results and therefore improved reliability of the derived conclusions. Therefore, the PTK method provides the experimental basis for model-based derivation of reaction kinetics valid under dynamic conditions. The applicability of the methodology is demonstrated for the methanation reaction chosen as an example process for heterogeneously catalyzed reactions relevant for chemical energy storage purposes. <br>

show abstract

Investigations on the Low Temperature Methanation with Pulse Reaction of CO

Cited by 11 publications

References 32 publications

Transient Flow Rate Ramps for Methanation of Carbon Dioxide in an Adiabatic Fixed‐Bed Recycle Reactor

Transient Flow Rate Ramps for Methanation of Carbon Dioxide in an Adiabatic Fixed‐Bed Recycle Reactor

Transfer Functions for Periodic Reactor Operation: Fundamental Methodology for Simple Reaction Networks

The Periodic Transient Kinetics Method for Investigation of Kinetic Process Dynamics Under Realistic Conditions: Methanation as an Example

Contact Info

Product

Resources

About