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**Harvard**

Sette, E., Pallares, D. och Johnsson, F. (2015) *Influence of bulk solids cross-flow on lateral mixing of fuel in dual fluidized beds*.

** BibTeX **

@article{

Sette2015,

author={Sette, Erik and Pallares, David and Johnsson, Filip},

title={Influence of bulk solids cross-flow on lateral mixing of fuel in dual fluidized beds},

journal={Fuel processing technology},

issn={0378-3820},

volume={140},

pages={245-251},

abstract={In typical dual fluidized bed systems — used e.g. in chemical looping combustion or indirect gasification of
biomass for production of second-generation biofuels — the bulk solids are continuously circulating between a
tall high-velocity riser and a bubbling bed. This circulation results in a solids cross-flow in the bubbling bed,which creates a net convective solids flow. The aims of this paper are to describe this convective flow by
means of mathematical modeling and to investigate the effect of the cross-flow of bulk solids on the lateral
mixing of fuel particles.
Experiments relevant for industrial conditions are carried out in a fluid dynamically downscaled cold flowmodel
of an existing indirect gasifier. It is found that the velocity field of the bulk solids induced by the solids cross-flow
can be described by a potential function obtained from a diffusion equation. As for the fuel particles, their slip
respect to the bulk solids cross-flowis quantified using a cross-flowimpact factor, θ, which is found to be a linear
function of fluidization velocity and in the range 0.18–0.68 for the conditions investigated. Finally, we conclude
that the fuel mixing in fluidized beds with a significant cross-flow of bed material can be described by a
convection–diffusion equation.},

year={2015},

keywords={Cross-flow; Fluidized bed; Lateral mixing},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 222896

A1 Sette, Erik

A1 Pallares, David

A1 Johnsson, Filip

T1 Influence of bulk solids cross-flow on lateral mixing of fuel in dual fluidized beds

YR 2015

JF Fuel processing technology

SN 0378-3820

VO 140

SP 245

OP 251

AB In typical dual fluidized bed systems — used e.g. in chemical looping combustion or indirect gasification of
biomass for production of second-generation biofuels — the bulk solids are continuously circulating between a
tall high-velocity riser and a bubbling bed. This circulation results in a solids cross-flow in the bubbling bed,which creates a net convective solids flow. The aims of this paper are to describe this convective flow by
means of mathematical modeling and to investigate the effect of the cross-flow of bulk solids on the lateral
mixing of fuel particles.
Experiments relevant for industrial conditions are carried out in a fluid dynamically downscaled cold flowmodel
of an existing indirect gasifier. It is found that the velocity field of the bulk solids induced by the solids cross-flow
can be described by a potential function obtained from a diffusion equation. As for the fuel particles, their slip
respect to the bulk solids cross-flowis quantified using a cross-flowimpact factor, θ, which is found to be a linear
function of fluidization velocity and in the range 0.18–0.68 for the conditions investigated. Finally, we conclude
that the fuel mixing in fluidized beds with a significant cross-flow of bed material can be described by a
convection–diffusion equation.

LA eng

DO 10.1016/j.fuproc.2015.09.017

LK http://dx.doi.org/10.1016/j.fuproc.2015.09.017

OL 30