Effect of water pretreatment on CO2 capture using a potassium-based solid sorbent in a bubbling fluidized bed reactor

Seo, Yongwon; Jo, Sung-Ho; Ryu, Ho-Jung; Bae, Hee Dal; Ryu, Chong Kul; Yi, Chang-Keun

doi:10.1007/s11814-007-0079-6

Cited by 66 publications

(61 citation statements)

References 3 publications

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“…CO 2 ? H 2 O 2MHCO 3 (M = Na, K) [4][5][6][7][8][9][10][11][12][13][14]. Alkali metal-based sorbents were utilized in CO 2 absorption at low temperatures (50-70°C).…”

Section: Introductionmentioning

confidence: 99%

Structure Effects of Potassium-Based TiO2 Sorbents on the CO2 Capture Capacity

et al. 2010

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“…CO 2 ? H 2 O 2MHCO 3 (M = Na, K) [4][5][6][7][8][9][10][11][12][13][14]. Alkali metal-based sorbents were utilized in CO 2 absorption at low temperatures (50-70°C).…”

Section: Introductionmentioning

confidence: 99%

Structure Effects of Potassium-Based TiO2 Sorbents on the CO2 Capture Capacity

et al. 2010

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“…The effect of both H 2 O pretreatment of solid sorbent and temperature control in the fluidized bed reactor on CO 2 removal was investigated in our previous paper [10]. The present study attempts to examine the effect of bed height on the CO 2 capture characteristics and performance of a potassium-based solid sorbent, SorbKX35T5, in a bubbling fluidized bed reactor.…”

Section: Introductionmentioning

confidence: 95%

“…However, these methods have been faced on the limits of cost and energy required to treat the massive flue gas streams from fossil fuel-fired power plants. Recently, CO 2 chemical absorption using dry regenerable solid sorbents has been studied as an innovative concept for CO 2 recovery [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. CO 2 is efficiently removed from the flue gas stream by reacting with solid sorbents while regeneration produces an off-gas containing only CO 2 and H 2 O.…”

Section: Introductionmentioning

confidence: 99%

“…Among several alkali and alkali earth metals for CO 2 absorption, Lee et al [3] reported that the potassium carbonate showed higher total CO 2 capture capacity than the sodium carbonate at the same operating conditions. And several researches have been performed using potassium-based solid sorbent to find out optimal compositions of the sorbent [4], effects of operating variables on CO 2 removal [10], and the performance of the sorbent by continuous operation [14,15]. However, the reaction characteristics of the potassium-based solid sorbent were not completely identified for some operating variables such as regeneration temperature, gas residence time, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Fig. 1 shows the schematic diagram of the experimental apparatus including a bubbling fluidized bed reactor [10]. The apparatus consists of a gas injection part, reactor, gas post-treatment part, and gas analyzer.…”

Section: Introductionmentioning

confidence: 99%

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Effect of bed height on the carbon dioxide capture by carbonation/regeneration cyclic operations using dry potassium-based sorbents

Park

et al. 2009

Korean J. Chem. Eng.

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The effect of bed height on CO 2 capture was investigated by carbonation/regeneration cyclic operations using a bubbling fluidized bed reactor. We used a potassium-based solid sorbent, SorbKX35T5 which was manufactured by the Korea Electric Power Research Institute. The sorbent consists of 35% K 2 CO 3 for absorption and 65% supporters for mechanical strength. We used a fluidized bed reactor with an inner diameter of 0.05 m and a height of 0.8 m which was made of quartz and placed inside of a furnace. The operating temperatures were fixed at 70 o C and 150 o C for carbonation and regeneration, respectively. The carbonation/regeneration cyclic operations were performed three times at four different L/D (length vs diameter) ratios such as one, two, three, and four. The amount of CO 2 captured was the most when L/D ratio was one, while the period of maintaining 100% CO 2 removal was the longest as 6 minutes when L/D ratio was three. At each cycle, CO 2 sorption capacity (g CO 2 /g sorbent) was decreased as L/D ratio was increased. The results obtained in this study can be applied to design and operate a large scale CO 2 capture process composed of two fluidized bed reactors.

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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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Effect of water pretreatment on CO2 capture using a potassium-based solid sorbent in a bubbling fluidized bed reactor

Cited by 66 publications

References 3 publications

Structure Effects of Potassium-Based TiO2 Sorbents on the CO2 Capture Capacity

Structure Effects of Potassium-Based TiO2 Sorbents on the CO2 Capture Capacity

Effect of bed height on the carbon dioxide capture by carbonation/regeneration cyclic operations using dry potassium-based sorbents

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

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