Kinetic study of carbon dioxide absorption with aqueous potassium carbonate promoted by arginine

Shen, Shufeng; Feng, Xiaoxia; Zhao, Rongqin; Ghosh, Ujjal; Chen, Aibing

doi:10.1016/j.cej.2013.02.093

Cited by 97 publications

(97 citation statements)

References 43 publications

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“…Guo et al (2011) used a stopped flow indicator method, and found that at total boron concentrations range of 4-12.5 mM and temperature range of 298-313 K the active form of the boron is B(OH) − 4 , and this ion can catalyze the CO 2 hydration using the enzyme carbonic anhydrase (CA) mechanism. Shen et al (2013b) took advantage of a WWC to perform the kinetic experiments on the argininepromoted PC solution. Nicholas et al (2014) first investigated the speciation of Pyrovanadate (Potassium-Vanadium-Oxide) in the aqueous solution of potassium carbonate.…”

Section: Kinetic Experimentsmentioning

confidence: 99%

CO2 capture with potassium carbonate solutions: A state-of-the-art review

Borhani

Azarpour

Akbari

et al. 2015

International Journal of Greenhouse Gas Control

182

105

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Section: Kinetic Experimentsmentioning

confidence: 99%

CO2 capture with potassium carbonate solutions: A state-of-the-art review

Borhani

Azarpour

Akbari

et al. 2015

International Journal of Greenhouse Gas Control

182

105

View full text Add to dashboard Cite

“…Therefore, it is desired that more K in form of K 2 CO 3 is loaded on SCFD-KN with a given surface area to maximize the CO 2 sorption capacities of the composite sorbents. However, the activation energy of CO 2 sorption with ANH 2 (E R3 , 49.0 kJ/mol), is smaller than that with K 2 CO 3 (E R1 , 71.9 kJ/mol) [22,23]. Based on…”

Section: K and N Loadingsmentioning

confidence: 98%

Development of K and N based composite CO2 sorbents (KN) dried with a supercritical fluid

Chen

Fan

et al. 2015

Chemical Engineering Journal

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h i g h l i g h t sA KN-based composite CO 2 sorbent dried with supercritical approach was developed. The sorbent has higher CO 2 sorption than that dried with conventional method does. The sorbent has higher stability than that dried with conventional method does. The sorbent has higher CO 2 sorption kinetics than the conventional one does. a b s t r a c tThe objective of this research was to develop composite CO 2 sorbents for overcoming the shortcomings of the corresponding individual sorbents. The composite sorbents were synthesized with K 2 CO 3 , 3-aminopropyltriethoxysilane (APTES), tetraethylorthosilicate (TEOS) and dried either with supercritical or conventional technique. Comparative experiments demonstrated that supercritical fluid drying (SCFD) was better than conventional drying (CD) in preparing CO 2 sorbents with more developed pore structure and thus higher CO 2 sorption capacity. The composite sorbent prepared with SCFD was tested under various conditions for their effects on CO 2 sorption capacity. The optimal K:N mole ratio for preparation of the composite sorbent and the reaction conditions for achieving the highest sorption capacity were obtained. In addition, the sorbent proved to be regenerable. Thus, supercritical drying is an effective technique for preparation of a promising composite CO 2 sorbent.

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“…In addition, since the activation energy for R1 is 71.9 kJ mol -1 [20], the activation energy for R2 should be 55.01 kJ mol -1 . Therefore, E16 can be organized as:…”

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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Kinetic study of carbon dioxide absorption with aqueous potassium carbonate promoted by arginine

Cited by 97 publications

References 43 publications

CO2 capture with potassium carbonate solutions: A state-of-the-art review

CO2 capture with potassium carbonate solutions: A state-of-the-art review

Development of K and N based composite CO2 sorbents (KN) dried with a supercritical fluid

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

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