Pilot scale absorption experiments with carbonic anhydrase-enhanced MDEA- Benchmarking with 30 wt% MEA

Gladis, Arne; Lomholdt, Niels F.; Fosbøl, Philip Loldrup; Woodley, John M.; Solms, Nicolas von

doi:10.1016/j.ijggc.2018.12.017

Cited by 22 publications

(12 citation statements)

References 27 publications

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“…However, enzyme catalysts have not been assumed to tolerate exposure to the high temperatures and the alkaline environment of amine-based capture and desorption processes. Yet, an engineered CA from Desulfovibrio vulgaris (DvCA8.0) was shown to have exceptional properties for CO 2 absorption at high temperatures in MDEA. , …”

Section: Introductionmentioning

confidence: 99%

“…Yet, an engineered CA from Desulfovibrio vulgaris (DvCA8.0) was shown to have exceptional properties for CO2 absorption at high temperatures in MDEA. 14,15 Comparatively, little work has been done on the integration of CA to amine systems other than MDEA, most likely due to the poor performance of CA in reactive highly alkaline amine 6 solutions, such as MEA. Ionic liquids, which are basically molten salts with tunable properties, have gained attention as CO2 sorbents, as the regeneration energies can be significantly lower compared to alkanolamines.…”

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confidence: 99%

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Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Sjöblom

Αντωνοπούλου

Jiménez

et al. 2020

ACS Sustainable Chem. Eng.

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The influence of carbonic anhydrase (CA) on the CO2 absorption rate and CO2 load in aqueous blends of the amino acid ionic liquid pentaethylenehexamine prolinate (PEHAp) and methyl diethanolamine (MDEA) was investigated and compared to aqueous monoethanolamine (MEA) solutions. The aim was to identify blends with good enzyme compatibility, several fold higher absorption rates than MDEA and superior desorption potential compared to MEA. The blend of 5% PEHAp and 20% MDEA gave a solvent with approximately 5-fold higher initial absorption rate than MDEA and a 2-fold higher regeneration compared to MEA. Experiments in a small pilot absorption rig resulted in a mass transfer coefficient (KGa) of 0.48, 4.6 and 15 mol (m 3 s mol fraction)-1 for 25% MDEA, 5% PEHAp 20% MDEA and 25% MEA, respectively. CA could maintain approximately 70% of its initial activity after 2 h incubation in PEHAp MDEA blends. Integration of CA with amine-based absorption resulted in a 31.7% increase in mass of absorbed CO2 compared to the respective non-enzymatic reaction at the optimal solvent: CA ratio and CA load. Combining novel blends and CA can offer a good compromise between capital and operating costs for conventional amine scrubbers, which could outperform MEA-based systems.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Sjöblom

Αντωνοπούλου

Jiménez

et al. 2020

ACS Sustainable Chem. Eng.

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“…The biocatalytic CO 2 capture mediated by CAs has been studied in a wide range of aqueous solvents, most likely in the presence of promoters, as amines (e.g., monoethanolamine-MEA, N-methyldiethanolamine-MDEA) [10] and salts, such as inorganic carbonates (K 2 CO 3 , Na 2 CO 3 ) [11,12], and ionic liquids under high water activity (a w ) conditions (e.g., 1-butyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide-[C 4 mim][Tf 2 N], at a w = 0.836) [13]. Therefore, the comprehension of the enzyme performance under different environmental conditions is important for the development of industrially-relevant processes of CO 2 capture.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its key role in living organisms, the previous structural investigations on BCA have focused on the elucidation of its properties under physiological conditions (pH below 7.5) to address queries related to life sciences [8,9,14,15]. Thus, to the best of our knowledge, there is a lack of studies and available data that relate BCA structural properties and its performance under industrially-relevant CO 2 capture conditions (mostly alkaline pH conditions) [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Biocatalytic CO2 Absorption and Structural Studies of Carbonic Anhydrase under Industrially-Relevant Conditions

Castro

Ferreira

Portugal

et al. 2020

IJMS

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The unprecedently high CO2 levels in the atmosphere evoke the urgent need for development of technologies for mitigation of its emissions. Among the alternatives, the biocatalytic route has been claimed as one of the most promising. In the present work, the carbonic anhydrase from bovine erythrocytes (BCA) was employed as a model enzyme for structural studies in an aqueous phase at alkaline pH, which is typical of large-scale absorption processes under operation. Circular dichroism (CD) analysis revealed a high enzymatic stability at pH 10 with a prominent decrease of the melting temperature above this value. The CO2 absorption capacity of the aqueous solutions were assessed by online monitoring of pressure decay in a stainless-steel cell, which indicated a better performance at pH 10 with a kinetic rate increase of up to 43%, as compared to non-biocatalytic conditions. Even low enzyme concentrations (0.2 mg g−1) proved to be sufficient to improve the overall CO2 capture process performance. The enzyme-enhanced approach of CO2 capture presents a high potential and should be further studied.

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“…Table 1 summarizes the energy performance of three kinds of new amine-based solvents. [29,31] A blend of amines solvents integrates the properties and advantages of various amines, such as a classic combination of primary amines (e.g., MEA) or secondary amines (e.g., DEA) mixed with tertiary amines (e.g., MDEA) [32,33]. The performance of this kind of solvent, which combines the high reaction rate of primary or secondary amines with the high absorption capacity and lower absorption heat of tertiary amines, has been tested at the pilot scale or even higher scales for many years [34,35].…”

Section: Introductionmentioning

confidence: 99%

Application of the Thermodynamic Cycle to Assess the Energy Efficiency of Amine-Based Absorption of Carbon Capture

Deng

Zhao

et al. 2019

Energies

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The thermodynamic cycle, as a significant tool derived from equilibrium, could provide a reasonable and rapid energy profile of complicated energy systems. Such a function could strongly promote an in-depth and direct understanding of the energy conversion mechanism of cutting-edge industrial systems, e.g., carbon capture system (CCS) However, such applications of thermodynamics theory have not been widely accepted in the carbon capture sector, which may be one of the reasons why intensive energy consumption still obstructs large-scale commercialization of CCS. In this paper, a kind of thermodynamic cycle was developed as a tool to estimate the lowest regeneration heat (Qre) of a benchmark solvent (MEA) under typical conditions. Moreover, COPCO2, a new assessment indicator, was proposed firstly for energy-efficiency performance analysis of such a kind of CCS system. In addition to regeneration heat and second-law efficiency (η2nd), the developed COPCO2 was also integrated into the existing performance analysis framework, to assess the energy efficiency of an amine-based absorption system. Through variable parameter analysis, the higher CO2 concentration of the flue gas, the higher COPCO2, up to 2.80 in 16 vt% and the Qre was 2.82 GJ/t, when Rdes = 1 and ΔTheat-ex = 10 K. The η2nd was no more than 30% and decreased with the rise of the desorption temperature, which indicates the great potential of improvements of the energy efficiency.

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Pilot scale absorption experiments with carbonic anhydrase-enhanced MDEA- Benchmarking with 30 wt% MEA

Cited by 22 publications

References 27 publications

Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Biocatalytic CO2 Absorption and Structural Studies of Carbonic Anhydrase under Industrially-Relevant Conditions

Application of the Thermodynamic Cycle to Assess the Energy Efficiency of Amine-Based Absorption of Carbon Capture

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Pilot scale absorption experiments with carbonic anhydrase-enhanced MDEA- Benchmarking with 30 wt% MEA

Cited by 22 publications

References 27 publications

Enzyme-Assisted CO2 Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Enzyme-Assisted CO2 Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Biocatalytic CO2 Absorption and Structural Studies of Carbonic Anhydrase under Industrially-Relevant Conditions

Application of the Thermodynamic Cycle to Assess the Energy Efficiency of Amine-Based Absorption of Carbon Capture

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Product

Resources

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Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends

Enzyme-Assisted CO₂ Absorption in Aqueous Amino Acid Ionic Liquid Amine Blends