Dynamic flowsheet simulation for chemical looping combustion of methane

Haus, Johannes; Hartge, Ernst‐Ulrich; Heinrich, Stefan; Werther, Joachim

doi:10.1016/j.ijggc.2018.03.004

Cited by 20 publications

(15 citation statements)

References 29 publications

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“…The total mass of OC in a dual fluidized bed system is distributed not only between the two main reactors but also between connecting devices (carbon stripper, cyclones, loop seals, and downcomers). As these components store particulate material, their modeling would be especially important for dynamic simulation of the system. , Generally, steady-state reactor models account for the “active” solid inventory, which includes the solids in air and fuel reactors but neglects the particles in other units . The presence of OC particles and gaseous reactants in these units may contribute to the overall species conversion in the system, but altogether, the attempts to model auxiliary devices other than carbon stripper and cyclones are rare.…”

Section: Fluidized Bed Reactor Modelingmentioning

confidence: 99%

Overview of Fluidized Bed Reactor Modeling for Chemical Looping Combustion: Status and Research Needs

et al. 2022

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Modeling of next-generation CO2 capture technology, namely, chemical looping combustion (CLC), in bubbling and circulating fluidized bed reactors is briefly reviewed, and a summary of published mathematical reactor models is presented. The emphasis is on a macroscopic modeling approach, which, aiming at both low computing times and accuracy of results, adopts a phenomenological view and combines transport equations with semiempirical correlations to describe the relevant fluidized bed phenomena, for example, gas–solid flow behavior, reaction characteristics, and thermal effects. Important aspects to be considered in the modeling of CLC in a dual fluidized bed reactor system are highlighted, together with indications of the research needs detected among the reviewed works. So far, semiempirical reactor models have been validated based on experimental results obtained at a larger scale of CLC technology, i.e, up to 0.15 MWth for gaseous fuels (syngas and methane) and up to 1 MWth for solid fuels (mainly coal). Overall, the model predictions agree reasonably well with experiments selected for validation, despite the various model formulations and input data. The research achieved in dynamic process simulation of CLC is very limited.

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Section: Fluidized Bed Reactor Modelingmentioning

confidence: 99%

Overview of Fluidized Bed Reactor Modeling for Chemical Looping Combustion: Status and Research Needs

et al. 2022

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“…Furthermore, there are various studies incorporating reactions of solid fuel with oxygen carriers, mostly for the investigation of chemical looping combustion systems [30][31][32][33][34]. However, few studies are available in the literature regarding the simulation of the biomass chemical looping gasification processes.…”

Section: Introductionmentioning

confidence: 99%

MP-PIC Simulation of Biomass Steam Gasification Using Ilmenite as an Oxygen Carrier

et al. 2022

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Biomass chemical looping gasification (BCLG) is a complex process for the conversion of biomass using an oxygen carrier, which is influenced by various operating parameters. For a better understanding of this process, biomass steam gasification using ilmenite as an oxygen carrier is numerically investigated in this work using the multiphase particle-in-cell (MP-PIC) method, which is a modified Euler–Lagrange approach. As a first step, a reduced reaction network for biomass gasification is investigated in a spouted bed. As a second step, the reaction network is coupled with oxygen carrier kinetics of ilmenite for the simulation of BCLG in a lab-scale fluidized bed. For both steps, the influence of the main operating parameters, such as reactor temperature, steam-to-biomass ratio, and oxidation degree of the oxygen carrier, are investigated and compared with experimental data from the literature. In general, the simulations show satisfying results and the predicted syngas compositions with varied operating parameters are in good agreement with the experimental data. Furthermore, the main trends for the syngas composition are predicted correctly and the oxidation degree of the oxygen carrier has a significant influence on the resulting syngas composition confirming the experimental results.

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“…Regarding this issue, the solid combustion in CLC was simulated as a result of developing the mathematical modeling. Also the modelling were performed on the fuel reactor for different gases with different oxygen carriers such as Parker (2014), Han and Bollas (2016), Porrazzo et al (2016), Menon and Patnaikuni (2017), Zhang et al (2017), Haus et al (2018) and Hamidouche et al (2019).…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis for simulating fuel reactor in chemical looping combustor system

Ismail

Ding

Ramzy

et al. 2020

Int J Coal Sci Technol

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The greenhouse problem has a significant effect on our communities such as, health and climate. Carbon dioxide is one of the main gases that cause global warming. Therefore, CO2 capture techniques have been the focus of attention these days. The chemical looping combustion technique adopted the air reactor and fuel reactor to recycle heat energy. This study presents a numerical and experimental investigation on a fuel reactor in chemical looping combustor (CLC) system. The present numerical model is introduced by the kinetic theory of granular flow and coupled with gas–solid flow with chemical reactions to simulate the combustion of solids in the CLC. The k–ε turbulent model was used to model the gas phase and the particle phase. The developed model simplify the prediction of flow patterns, particle velocities, gas velocities, and composition profiles of gas products and the distribution of heterogeneous reaction rates under the same operating conditions. The predicted and experimental results were compared according to the basis of determination coefficient (R2). In addition the results showed that there is a good agreement between the predicted and experimental data. The value of (R2) for CO, CO2 and CH4 was 0.959, 0.925 and 0.969 respectively. This shows that the present model is a promising simulation for solid particle combustion and gives the power direction for the design and optimization of the CLC systems.

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Dynamic flowsheet simulation for chemical looping combustion of methane

Cited by 20 publications

References 29 publications

Overview of Fluidized Bed Reactor Modeling for Chemical Looping Combustion: Status and Research Needs

Overview of Fluidized Bed Reactor Modeling for Chemical Looping Combustion: Status and Research Needs

MP-PIC Simulation of Biomass Steam Gasification Using Ilmenite as an Oxygen Carrier

Numerical and experimental analysis for simulating fuel reactor in chemical looping combustor system

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