Continuous operation of the potassium-based dry sorbent CO2 capture process with two fluidized-bed reactors

Yi, Chang-Keun; Jo, Sung-Ho; Seo, Yongwon; Lee, Joong-Beom; Ryu, Chong-Kul

doi:10.1016/s1750-5836(07)00014-x

Cited by 181 publications

(110 citation statements)

References 4 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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“…However, more research should be done to reduce the sulfation percentage of active content (K 2 CO 3 ). H 2 O concentration plays an important role in the CO 2 sorption process [21,22]. It is worthwhile in this study to investigate the effects of H 2 O concentration on the competitiveness of R1 and R2.…”

Section: Factors Affect the Competitivenessmentioning

confidence: 99%

The negative effects of SO2 on CO2 capture with K2CO3/Al2O3

Chen

2015

J Therm Anal Calorim

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Post-combustion CO 2 capture technology with K-based sorbent is considered to be an innovative capture concept; however, the residual SO 2 in the flue gas will still affect the CO 2 sorption performance of the K-based sorbent. This paper investigated the CO 2 sorption and sulfation characteristics of K 2 CO 3 /Al 2 O 3 . The effects of several variables such as H 2 O concentration, SO 2 concentration, and sorption temperature were studied. Results showed that it was important to investigate the effects of SO 2 on the CO 2 capture capacity of this sorbent, even when the SO 2 concentration is very low due to the fact that the sulfation competes with the CO 2 sorption process. K 2 SO 3 , as the sulfation product, cannot be converted back to K 2 CO 3 for reuse. In order to enhance the CO 2 sorption competitiveness or to increase the reaction rate ratio (e) of the sorbent, the fluidized bed reactor (FBR) was selected as the suitable reactor for the sorption process. Also, besides increasing CO 2 /SO 2 volume ratio in the flue gas, properly increasing the sorption temperature and H 2 O concentration will increase the CO 2 sorption competitiveness. Pretreating sorbent with H 2 O vapor and using them to capture CO 2 in FBR will get further better CO 2 sorption competitiveness. Based on the competition model built in this paper, the activation energy for K 2 CO 3 and SO 2 is 55.01 kJ mol -1 . The results from this study supply theoretical evidence for commercial operation of post-combustion CO 2 capture technology with K-based sorbent.

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“…Many studies have found ways to remove CO 2 from flue gas massively with regenerable sorbents which are based on Na, K, and Ca [1][2][3][4][5][6][7][8][9][10][11]. The fluidized-bed CO 2 capture system consisting of a riser or a transportor entrained-bed absorber and a bubbling-bed regenerator is used due to several potential advantages.…”

Section: Introductionmentioning

confidence: 99%

A model on an entrained bed-bubbling bed process for CO2 capture from flue gas

Choi

2011

Korean J. Chem. Eng.

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A simplified model has been developed to investigate effects of important operating parameters on performance of an entrained-bed absorber and bubbling-bed regenerator system collecting CO 2 from flue gas. The particle population balance was considered together with chemical reaction to determine the extent of conversion in both absorber and regenerator. The calculated CO 2 capture efficiency agreed with the measured value reasonably well. Effects of absorber parameters -temperature, gas velocity, static bed height, moisture content of feed gas on CO 2 capture efficiency -have been investigated in a laboratory scale process. The CO 2 capture efficiency decreased as temperature or gas velocity increased. However, it increased with static bed height or moisture concentration. The CO 2 capture efficiency was exponentially proportional to each parameter. Based on the absolute value of exponent of the parameter, the effect of gas velocity, static bed height, and moisture content was one-half, one-third, and one-fourth as strong as that of temperature, respectively.

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Continuous operation of the potassium-based dry sorbent CO2 capture process with two fluidized-bed reactors

Cited by 181 publications

References 4 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

The negative effects of SO2 on CO2 capture with K2CO3/Al2O3

A model on an entrained bed-bubbling bed process for CO2 capture from flue gas

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