Analysis of K2CO3/Al2O3 CO2 sorbent tested with coal-fired power plant flue gas: Effect of SOx

Kim, Kyeongsook; Yang, Seugran; Lee, Joong Beom; Eom, Tae Hyoung; Ryu, Chong Kul; Jo, Sung-Ho; Park, Young Cheol; Yi, Chang-Keun

doi:10.1016/j.ijggc.2012.04.004

Cited by 33 publications

(10 citation statements)

References 18 publications

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“…Three developed sorbents were tested for the CO 2 sorption capacity to screen the chemical reactivity for matrices of prepared sorbent, 2 cycle carbonation and regeneration test was carried out at 70°C and 140°C based on the results of P1, respectively (Kim et al, 2012). Figure 4 shows the sorption capacities of these sorbents.…”

Section: Chemical Reactivitymentioning

confidence: 99%

“…In 2010, the 2,000 Nm 3 /h (0.5 MW e ) capture process was installed to slip stream of the flue gas of coal-fired power plant of Korea Southern Power Co., Ltd. (KOSPO) located in Hadong, Korea and is being evaluated for various operation conditions and sorbents. The results of CO 2 removal attained approximately 80% for 50 h (Kim et al, 2012). This paper presents the properties, CO 2 sorption capacity, rate, and regenerability, as well as the important physical properties, of K 2 CO 3 -MgO based solid sorbents selected as a candidate for the 2,000 Nm 3 /h (0.5 MW) and the 10 MW e capture process developed to improve the performances such as mechanical strength expressed in the attrition index and chemical reactivity of K 2 CO 3 -Al 2 O 3 based sorbent named KEP-CO2P (P1, hereafter), and addressed the results of various analysis, i.e.…”

Section: Introductionmentioning

confidence: 96%

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Characteristics of Spray-Dried K2CO3-MgO Solid Sorbent for CO2 Capture from Power Plant Flue Gas

Eom

Lee

Kim

et al. 2017

J. Chem. Eng. Japan / JCEJ

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Three K 2 CO 3 -MgO based solid sorbents were prepared with a spray drying method to prevent the degradation of the chemical reactivity of K 2 CO 3 -Al 2 O 3 sorbents named KEP-CO2P, which were produced in bulk. Their physical properties and reactivity were screened to evaluate their applicability to a 0.5 MWe (2,000 Nm 3 /h) CO 2 capture pilot plant built for Unit 3 and a 10 MWe (40,000 Nm 3 /h) CO 2 capture pilot plant built for Unit 8 of the Hadong thermal power station. The CO 2 sorption capacity and percentage utilization of K 2 CO 3 -MgO based sorbent, Sorb-KM2, was 8.6 wt% (g-CO 2 /100 g-sorbent) and 90%, respectively, along with good mechanical strength for uidized-bed application. Sorb-KM2 was tested using a 2 Nm 3 /h circulating uidized bed process to evaluate their applicability to a uidized bed process, and the chemical and structural characteristics were investigated by PSA, FE-SEM, EPMA and XPS.

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Section: Chemical Reactivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Characteristics of Spray-Dried K2CO3-MgO Solid Sorbent for CO2 Capture from Power Plant Flue Gas

Eom

Lee

Kim

et al. 2017

J. Chem. Eng. Japan / JCEJ

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“…The effects of SO 2 on the carbonation process of K 2 CO 3 calcined from KHCO 3 and K 2 CO 3 /Al 2 O 3 were studied in a TGA (Wu, Chen, & Zhao, 2011) and a fixed-bed reactor (Kim et al, 2012). It was found that compared with the reaction process of K 2 CO 3 /Al 2 O 3 without H 2 O pretreatment, its reaction rate increased after H 2 O pretreatment and the amount of the formation of K 2 SO 3 is about a half of that without H 2 O pretreatment.…”

Section: Effects Of Operation Conditionsmentioning

confidence: 99%

Low-temperature solid carbon dioxide carriers

Zhao

Chen

2015

Calcium and Chemical Looping Technology for Power Generation and Carbon Dioxide (CO2) Capture

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“…However, to the best knowledge of these authors, only a couple of studies have been conducted to evaluate the effects of SO 2 on potassium-based CO 2 capture [12][13][14]. These studies were focused on confirming the fact that R2 and R3 exist and SO 2 was really competitive than CO 2 in consuming K 2 CO 3 .…”

Section: Introductionmentioning

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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Analysis of K2CO3/Al2O3 CO2 sorbent tested with coal-fired power plant flue gas: Effect of SOx

Cited by 33 publications

References 18 publications

Characteristics of Spray-Dried K<sub>2</sub>CO<sub>3</sub>-MgO Solid Sorbent for CO<sub>2</sub> Capture from Power Plant Flue Gas

Characteristics of Spray-Dried K<sub>2</sub>CO<sub>3</sub>-MgO Solid Sorbent for CO<sub>2</sub> Capture from Power Plant Flue Gas

Low-temperature solid carbon dioxide carriers

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

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