Computational fluid dynamics modeling of biomass fast pyrolysis in a fluidized bed reactor, using a comprehensive chemistry scheme

Mellin, Pelle; Kantarelis, Efthymios; Yang, Weihong

doi:10.1016/j.fuel.2013.09.009

Cited by 112 publications

(86 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The computation time for 1 s real processing time was 7.7 hr, which is considerably realistic compared to some of the recently reported CFD simulation time for similar problems, e.g. Mellin et al [26] reported a processing time of around 66 hr for each 1s real processing time.…”

Section: Computation Procedures and Boundary Conditionsmentioning

confidence: 53%

“…[10]) (iii) multicomponent reactions model (e.g. [20,23,26]). The first option is the simplest and assumes that the biomass is thermally degraded to a final product of char, condensable vapour (bio-oil) and a permanent gas (NCG) and this can be represented by a single first order reaction and one global rate constant.…”

Section: 32devolatilizationmentioning

confidence: 99%

“…This method is also referred to in the literature as particle tracking or trajectory calculation (e.g. [26], [46]). The tracking method was implemented in ANSYS-FLUENT platform to monitor the velocity field of the gas phase.…”

Section: Fig 6 Shows the Gas Velocity Vector After 5 S Operation (Stmentioning

confidence: 99%

“…Most recently, Mellin et al [26] developed and implemented a more detailed numerical reaction network for the simulation of biomass pyrolysis in a bubbling fluidized bed reactor. The model was solved using ANSYS-FLUENT CFD commercial code.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

Hassan

Ocone

et al. 2015

Fuel Processing Technology

View full text Add to dashboard Cite

Highlight A CFD model is used to simulate biomass fast pyrolysis in a downer reactor. An Eulerian-Eulerian approach with a single global pyrolysis reaction is used. A novel gas-solid separator was used to control the gas residence time. Predicted pyrolysis yield is in good agreement with reported literature data. AbstractA Eulerian-Eulerian CFD model was used to investigate the fast pyrolysis of biomass in a downer reactor equipped with a novel gas-solid separation mechanism. The highly endothermic pyrolysis reaction was assumed to be entirely driven by an inert solid heat carrier (sand). A one-step global pyrolysis reaction, along with the equations describing the biomass drying and heat transfer, was implemented in the hydrodynamic model presented in part I of this study (Fuel Processing Technology, V126,(366)(367)(368)(369)(370)(371)(372)(373)(374)(375)(376)(377)(378)(379)(380)(381)(382). The predictions of the gas-solid separation efficiency, temperature distribution, residence time and the pyrolysis product yield are presented and discussed. For the operating conditions considered, the devolatilisation efficiency was found to be above 60% and the yield composition in mass fraction was 56.85% bio-oil, 37.87% bio-char and 5.28% non-condensable gas (NCG). This has been found to agree reasonably well with recent relevant published experimental data. The novel gas-solid separation mechanism allowed achieving greater than 99.9% separation efficiency and < 2 s pyrolysis gas residence time. The model has been found to be robust and fast in terms of computational time, thus has the great potential to aid in future design and optimisation of the biomass fast pyrolysis process.

show abstract

Section: Computation Procedures and Boundary Conditionsmentioning

confidence: 53%

Section: 32devolatilizationmentioning

confidence: 99%

Section: Fig 6 Shows the Gas Velocity Vector After 5 S Operation (Stmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

Hassan

Ocone

et al. 2015

Fuel Processing Technology

View full text Add to dashboard Cite

show abstract

“…With the rapid development of computer technology, computational fluid dynamics method has become an important means for hydrocyclone due to the high speed and low cost [7][8][9][10]. Research of hydrocyclone separation mainly concentrated on solid-liquid aspect.…”

Section: Introductionmentioning

confidence: 99%

Oil-water separation efficiency and fluid mechanics of a hydrocyclone

Fan¹

2016

Proceedings of the 2016 7th International Conference on Mechatronics, Control and Materials (ICMCM 2016)

View full text Add to dashboard Cite

Abstract. Hydrocyclone separation technology as a kind of effective oil water separation technology, has been applied in the oil industry. The paper proposes numerical simulation of computational fluid dynamics which combine Reynolds stress model and Euler multi-phase model together, and discusses the operating conditions and material properties making influence on the efficiency of oil-water separation of a hydrocyclone by Fluent6.3. The simulation shows that the hydrocyclone with diameter 50mm, two inlets, and a single cone angle 5.5°, has an optimum distribution ratio 10%，a best concentration of oil droplets 0.5%. Under the above conditions, the hydrocyclone could remove more than 80% per 15 m  oil droplets, and the separation of oil droplets cut size is 9.2 m  for 50% separation efficiency. Through simulated prediction of separation efficiency corresponding to the measured values, the error is obtained less than 15%.

show abstract

Multiphase Reactors for Biomass Processing and Thermochemical Conversions

Masnadi

2017

Multiphase Reactor Engineering for Clean and Low‐Carbon Energy Applications

View full text Add to dashboard Cite

Computational fluid dynamics modeling of biomass fast pyrolysis in a fluidized bed reactor, using a comprehensive chemistry scheme

Cited by 112 publications

References 25 publications

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

Oil-water separation efficiency and fluid mechanics of a hydrocyclone

Multiphase Reactors for Biomass Processing and Thermochemical Conversions

Contact Info

Product

Resources

About