Influence of temperature on the kinetics of enzyme catalysed absorption of carbon dioxide in aqueous MDEA solutions

Elk, Nathalie J.M.C. Penders-van; Aken, Coen van; Versteeg, Geert

doi:10.1016/j.ijggc.2016.02.021

Cited by 13 publications

(6 citation statements)

References 31 publications

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“…In this study, we assumed that the maximum value was 0.5 mol CO 2 mol −1 MDEA (Shen and Li 1992;El Hadri 2017). Addition of carbonic anhydrase as a catalyst should not influence the physical or chemical properties of the amine solvent (Penders-van Elk et al 2016).…”

Section: Resultsmentioning

confidence: 99%

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Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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Carbon dioxide is considered the most important contributor to the global warming effect. To reduce greenhouse gas emissions, CO 2 should be separated from the exhaust gas stream in a selective way. The most often applied technology to capture CO 2 from exhaust gases is the reactive absorption in aqueous amine solutions, which is currently widely used in different industrial applications. The efficiency of this technology could be improved by applying high-gravity technologies that intensify mass transfer and can enable substantial equipment size reduction compared to the traditionally used packed columns. Rotating packed bed (RPB) technology meets these requirements very well. Applying innovative materials such as the highly efficient enzyme carbonic anhydrase can further improve the efficiency of the CO 2 absorption process. This combination of intensified technology together with new solvents is expected to improve the total efficiency of CO 2 absorption. In this study, we present our experimental results of CO 2 absorption using 30 wt% N-methyldiethanolamine (MDEA) solution in water in an RPB unit with and without carbonic anhydrase for different gas and liquid flow rates. The results indicate significantly improved performance of CO 2 absorption, up to 18 times compared to the solvent without enzyme. Keywords Rotating packed bed • RPB • CO 2 absorption • Carbonic anhydrase • MDEA Symbols a Specific surface area of the packing m 2 m −3 A Cross-section area m 2 c %MDEA MDEA concentration in water solution % F factor F factor Pa 0.5 M MDEA Molar mass of MDEA kg kmol −1 n CO 2 ,abs Molar flow rate of total absorbed CO 2 mol h −1 n CO 2 ,abs,packing Molar flow rate of absorbed CO 2 inside the packing mol h −1ṅ CO 2 ,abs,case Molar flow rate of absorbed CO 2 in the casing mol h −1 n G in CO 2 Molar flow rate of CO 2 in gas inlet mol h −1 n G inside CO 2 Molar flow rate of CO 2 in the casing mol h −1 n G out CO 2 Molar flow rate of CO 2 in gas outlet mol h −1 p Pressure Pa R Gas constant J mol −1 K −1 T Temperature K u L Specific liquid load m 3 m −2 h −1 v in CO 2 Volume fraction of CO 2 in gas inlet m 3 m −3 v inside CO 2 Volume fraction of CO 2 in gas m 3 m −3 v out CO 2 Volume fraction of CO 2 in gas outlet m 3 m −3 V G Volumetric gas flow m 3 h −1 V L Volumetric liquid flow m 3 h −1 Y CO 2 CO 2 loading mol mol −1 Greek letters Porosity of the packing m 3 m −3 G Density of gas kg m −3 MDEA Density of MDEA kg m −3

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Section: Resultsmentioning

confidence: 99%

“…The complete reaction mechanism of carbonic anhydrase with CO 2 is a closed cycle, which is presented in Fig. 3 (1) Penders-van Elk et al 2016). The "B" represents the base that is used for enzyme regeneration, e.g., hydroxide ion, carbonate ion, bicarbonate ion or alkanolamine (Penders-van Elk et al 2016).…”

Section: Theoreticalmentioning

confidence: 99%

Enzyme-enhanced CO2 absorption process in rotating packed bed

et al. 2018

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“…Some researchers found an increase in CA reaction rate constant with temperature, for MDEA [17] and K 2 CO 3 [19], whereas others observed no change in K 2 CO 3 [18]. In our previous study we even reported a decrease in kinetic rate constant with temperature for a different CA in MDEA [30].…”

Section: 4liquid Phase Compositionmentioning

confidence: 57%

“…Several authors reported a deviation from that linear relationship at high enzyme concentrations[10][36][37]. Pender-van Elk et al proposed a Langmuir-Hinshelwood type of relation as in Eq (17). to describe that behavior.…”

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confidence: 99%

CO2 mass transfer model for carbonic anhydrase-enhanced aqueous MDEA solutions

Gladis

Gundersen

Neerup

et al. 2018

Chemical Engineering Journal

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“…Genetically modified CA is also capable of catalyzing the reaction between CO 2 and aqueous alkanolamine solutions (or buffer solutions) in industrial applications 29,33–35 . In a recently published paper, the authors also proposed the acceleration of carbon capture performance using proprietary enzymatic technology 36 .…”

Section: Introductionmentioning

confidence: 99%

The enhanced enzymatic performance of carbonic anhydrase on the reaction rate between CO₂ and aqueous solutions of sterically hindered amines

Cihan

Orhan

2020

Greenhouse Gases

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The kinetics of the reactions of carbon dioxide (CO 2) with aqueous solutions of two different sterically hindered amines (SHAs), 2-amino-2-ethyl-1,3-propanediol (AEPD) and 2-amino-2-methyl-1,3-propanediol (AMPD), in the presence and absence of carbonic anhydrase (CA) was investigated experimentally using stopped-flow conductimetry. The amine concentration, CA concentration, and temperature were varied within the ranges of 0.1-0.5 kmol•m-3 , 0-125 g•m-3 , and 298-353 K, respectively. Based on pseudo first-order reaction conditions, the intrinsic reaction rate (k o) was obtained according to a modified termolecular reaction mechanism. The obtained results showed that the reaction rate between the SHA solutions (either aqueous AEPD or aqueous AMPD) and CO 2 was enhanced significantly upon adding small amounts of CA as a promoter. Such a result supports the use of the aforementioned solvent system as a candidate for CO 2 capture.

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Influence of temperature on the kinetics of enzyme catalysed absorption of carbon dioxide in aqueous MDEA solutions

Cited by 13 publications

References 31 publications

Enzyme-enhanced CO2 absorption process in rotating packed bed

Enzyme-enhanced CO2 absorption process in rotating packed bed

CO2 mass transfer model for carbonic anhydrase-enhanced aqueous MDEA solutions

The enhanced enzymatic performance of carbonic anhydrase on the reaction rate between CO₂ and aqueous solutions of sterically hindered amines

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Influence of temperature on the kinetics of enzyme catalysed absorption of carbon dioxide in aqueous MDEA solutions

Cited by 13 publications

References 31 publications

Enzyme-enhanced CO2 absorption process in rotating packed bed

Enzyme-enhanced CO2 absorption process in rotating packed bed

CO2 mass transfer model for carbonic anhydrase-enhanced aqueous MDEA solutions

The enhanced enzymatic performance of carbonic anhydrase on the reaction rate between CO2 and aqueous solutions of sterically hindered amines

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The enhanced enzymatic performance of carbonic anhydrase on the reaction rate between CO₂ and aqueous solutions of sterically hindered amines