Compact fluidized bed sorber for CO2 capture

Khongprom, Parinya; Gidaspow, Dimitri

doi:10.1016/j.partic.2010.09.001

Cited by 32 publications

(17 citation statements)

References 7 publications

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“…This indicates that all the grids are sufficiently fine for providing reliable results. The solid-volume fraction in the riser-sorber is approximately double that of computed by Kongporm and Gidaspow 21 for 75 micron particles at the same velocity of 1 m/s.…”

Section: Thermodynamics and Availabilitymentioning

confidence: 49%

“…These problems can be almost completely eliminated by improving the inlet conditions and some solid sorbent properties. The recent study by Khongprom and Gidaspow 21 showed that a compact fluidized-bed riser sorber with a proper configuration can eliminate the usual core-annular flow in the circulating fluidized beds. The simulations in this study for the riser-sorber section were done similarly to the Khongprom and Gidaspow 21 study.…”

Section: Fluidized-bed Riser-sorbermentioning

confidence: 99%

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Carbon dioxide capture using solid sorbents in a fluidized bed with reduced pressure regeneration in a downer

Kongkitisupchai

Gidaspow

2013

AIChE Journal

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The most common technology for postcombustion CO 2 capture for existing power plants is the amine solvent scrubber. The energy consumption for capturing CO 2 from flue gases using amine solvent technology is 15 to 30% of the power plant electricity production. Hence, there is a need to develop more efficient methods of removing CO 2 . Here, we show a novel design, obtained using multiphase CFD, and of a fluidized-bed reduced pressure regenerator, coupled with a fluidized-bed sorber, which has the potential to reduce the energy consumption. The undesirable core-annular flow regime in the riser-sorber is eliminated using multiple jet inlets and large particles leading to a shorter height. Up to 88% of the heat liberated in the riser-sorber is recovered in the downer-regenerator.

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Section: Thermodynamics and Availabilitymentioning

confidence: 49%

Section: Fluidized-bed Riser-sorbermentioning

confidence: 99%

Carbon dioxide capture using solid sorbents in a fluidized bed with reduced pressure regeneration in a downer

Kongkitisupchai

Gidaspow

2013

AIChE Journal

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“…Since then the kinetic theory approach was extended to flow of mixtures of particles of various sizes by several groups, including rotation (Songprawat andGidaspow 2010, Shuai et al 2012), to anisotropic flow using the method of moments (Strumendo et al 2005, Juhui et al 2012 and to continuous particle size distributions using population balances (Strumendo and Arastoopour, 2010). Recently, it was shown that the core-annular flow can be eliminated (Khongprom andGidaspow 2010, Kashyap et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Kinetic theory based multiphase flow with experimental verification

Gidaspow

Bacelos

2017

Reviews in Chemical Engineering

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Abstract This review is an extension of our 2014 circulating fluidized bed (CFB) plenary lecture. A derivation of multiphase mass, momentum and energy balances is presented, with a review of elementary kinetic theory, to explain the concepts of granular temperature and pressure and the core-annular flow regime commonly observed in CFB. The kinetic theory shows that the particle concentration is given by the reciprocal of a fourth order parabola of dimensional tube radius, in agreement with experiments. Computed flow regimes and heat and mass transfer coefficients in fluidization are also discussed.

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“…Consequently, computational fluid dynamics (CFD) becomes an attractive and feasible method for performance analysis, design and optimization of multiphase reactors. Numerical simulations of the fluidized-bed CO 2 capture reactors with alkali metal as sorbent have been reported in the published literature [14][15][16][17]. However, CFD modeling of CO 2 capture process using solid amine sorbent is still scarce.…”

Section: Introductionmentioning

confidence: 99%