The CO2 desorption analysis of tri-solvent MEA+BEA+DEEA with several commercial solid acid catalysts

Shi, Huancong; Peng, Jiacheng; Cheng, Xiaofang; Yang, Xuan; Jin, Jing; Hu, Jiaxing

doi:10.1016/j.ijggc.2022.103647

Cited by 19 publications

(27 citation statements)

References 45 publications

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Section: The Catalytic Co 2 Desorption Of Mea + Eae + Amp With Direct...supporting

confidence: 91%

“…This phenomenon was explicable, since the optimized blending ratio of 0.2/2 with solid acid was slightly better than the biggest blending ratio 0.5/2 with optimized catalysis. This result and academic explanation are similar to those of another test on MEA + BEA + DEEA + γ-Al2O3/H-ZSM-5 [64]. The comparison of optimized ratio plus catalysts with boundary ratio plus optimized catalysis needs to be further studied case by case.…”

Section: The Catalytic Co 2 Desorption Of Mea + Eae + Amp With Direct...supporting

confidence: 81%

“…The smaller, the better. This outcome was not only similar to those in the other three cases, but also accorded with previous studies in tri-solvent MEA + BEA + DEEA[64]. The heat duty of HND-8 was the lowest among the five types of solid acid catalysts.Compared Figure12with Figure6, the heat duty of 0.2 + 1 + 3 mol/L was less than that of 0.2 + 2 + 2 mol/L at both 30 and 60 min.…”

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confidence: 91%

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Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Zhang

Peng

et al. 2022

Catalysts

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The Paris Agreement and one of its goals, “carbon neutrality,” require intensive studies on CO2 absorption and desorption processes. When searching for ways of reducing the huge energy cost of CO2 desorption in the amine scrubbing process, the combination of blended amine with solid acid catalysts turned out to be a powerful solution in need of further investigation. In this study, the tri-solvent MEA (monoethanolamine) + EAE(2-(ethylamino)ethanol) + AMP(2-amino-2-methyl-1-propanol) was prepared at: 0.2 + 2 + 2, 0.5 + 2 + 2, 0.3 + 1.5 + 2.5 and 0.2 + 1 + 3 mol/L. The heterogeneous catalytic CO2 desorptions were tested with five commercial catalysts: blended γ-Al2O3/H-ZSM-5, H-beta, H-mordenite, HND-8 and HND-580. Desorption experiments were conducted via a recirculation process with direct heating at 363 K or using temperature programming method having a range of 303–363 K. Then, the average CO2 desorption rate, heat duty and desorption factors were studied. After comparison, the order of CO2 desorption performance was found to be HND-8 > HND-580 > H-mordenite > Hβ > blended γ-Al2O3/H-ZSM-5 > no catalyst. Among the other combinations, the 0.2 + 1 + 3 mol/L MEA + EAE + AMP with HND-8 had a minimized heat duty (HD) of 589.3 kJ/mol CO2 and the biggest desorption factor (DF) of 0.0277 * (10−3 mol CO2)3/L2 kJ min. This study provided a kind of tri-solvent with catalysts as an energy-efficient solution for CO2 absorption and desorption in industrial CO2 capture pilot plants.

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Section: The Catalytic Co 2 Desorption Of Mea + Eae + Amp With Direct...supporting

confidence: 91%

Section: The Catalytic Co 2 Desorption Of Mea + Eae + Amp With Direct...supporting

confidence: 81%

supporting

confidence: 91%

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Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Zhang

Peng

et al. 2022

Catalysts

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“…On the other hand, tertiary amines cannot react directly with CO 2 (because they do not have hydrogens on the amino functionality necessary for the formation of carbamate) and act as a base to promote the CO 2 hydration reaction and form bicarbonate and carbonate ions. − As a result, the tertiary amines always demonstrate much lower reaction kinetics for CO 2 absorption than the primary/secondary amines but they can be regenerated with less energy consumption and can provide higher CO 2 loading capacities . Recently, the blending of different amines with different properties has attracted great interest, as it has been shown that it is possible to exploit the advantage of each individual amine solvent to formulate absorbents with superior CO 2 capture performance. − …”

Section: Introductionmentioning

confidence: 99%

“…Ethanolamine (MEA) is certainly the most studied and used amine and is considered the benchmark for every sorbent-based CCS process. − More recently, benzylamine (BZA), another primary amine, has also aroused the interest of numerous research groups to be used both individually and mixed with other amines. ,− Many studies have shown that BZA and MEA have similar absorption capacity, carbamate stability, comparable vapor pressure, and boiling point. , Compared to MEA, BZA exhibits higher cyclic capacity, lower viscosity and lower heat capacity, faster absorption rate, and a better ability to promote mass transfer in blends . Furthermore, BZA is less subject to oxidative degradation than MEA and has a less corrosive behavior for the equipment .…”

Section: Introductionmentioning

confidence: 99%

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis

et al. 2022

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Aiming at formulating efficient sorbents for carbon capture and separation (CCS) processes, in this work, we evaluated the CO2 capture performance of aqueous blends of two primary amines, namely, ethanolamine (MEA), the benchmark for any capture process, combined with benzylamine (BZA), which has intriguing characteristics for industrial use, such as low corrosivity and good resistance to thermal and oxidative degradation. The CO2 loading, the CO2 absorption rate, and the CO2 heat of absorption were determined at 313 K for three different formulations of aqueous BZA/MEA blends, all with the same overall amine concentration (6 M) but with different amine molar ratios (1/2, 1/1, 2/1) by treating a gas mixture containing 15% CO2 (by volume) mimicking a fossil-derived flue gas. Furthermore, through an accurate 13C NMR study, the species present in solution during the CO2 absorption process were identified and quantified to understand the capture mechanism and to evaluate the interactions of the two primary amines when present together in different molar ratios. As a result, the three tested blends show similar high CO2 absorption rates, and their final loading values decrease in the order BZA/MEA 1/2 > BZA/MEA 1/1 > BZA/MEA 2/1, suggesting that a greater relative amount of MEA in the blend is advantageous to achieve a relatively higher CO2 loading. The 13C NMR analysis confirmed that the greater alkalinity of MEA leads to a greater formation of bicarbonate in solution and consequently higher loading. Finally, the CO2 absorption heat of all tested mixtures, measured using a high-precision microcalorimeter, was found to be comparable, if not even higher, to that of each individual amine.

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Catalytic and noncatalytic CO₂ abs‐desorption studies of MEA‐TETA‐DEEA/MEA‐TETA‐AMP tri‐solvents at specific blended ratios

Wei,

Shi,

Jin

et al. 2024

Asia-Pacific J Chem Eng

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To discover the “coordinative effect” within MEA‐polyamines, the non‐catalytic CO2 absorption‐desorption tests were conducted within tri‐solvents of “MEA‐TETA (triethylenetetramine)‐DEEA (N, N‐diethylethanolamine)/AMP(2‐amino‐2‐methyl‐1‐propanol)” at specific concentrations of .1 ~ .5 + 2 + 2 mol/L for the first time. The energy efficient combinations were detected of MEA‐TETA based tri‐solvents with solid acid catalysts, from catalytic CO2 desorption experiments onto MEA‐TETA‐DEEA/MEA‐TETA‐AMP with several commercial solid acid catalysts: blended γ‐Al2O3/H‐ZSM‐5 = 2:1, H‐mordenite, H‐Beta (Hβ), HND‐580, and HND‐8. Three parameters were adopted to evaluate desorption activity: average desorption rate, heat duty, and desorption factors (DFs). After analyses, the .1 + 2 + 2 mol/L MEA‐TETA‐AMP with catalyst HND‐8 possessed the best CO2 desorption at 95–98°C with biggest DF. The desorption ability of DEEA was better than AMP, but with aid of solid acid catalyst, the AMP can release more CO2 than DEEA due to weak stability of AMP‐CO2− carbamate.

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The CO2 desorption analysis of tri-solvent MEA+BEA+DEEA with several commercial solid acid catalysts

Cited by 19 publications

References 45 publications

Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis

Catalytic and noncatalytic CO₂ abs‐desorption studies of MEA‐TETA‐DEEA/MEA‐TETA‐AMP tri‐solvents at specific blended ratios

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The CO2 desorption analysis of tri-solvent MEA+BEA+DEEA with several commercial solid acid catalysts

Cited by 19 publications

References 45 publications

Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Evaluating CO2 Desorption Activity of Tri-Solvent MEA + EAE + AMP with Various Commercial Solid Acid Catalysts

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO2 Capture through 13C NMR Speciation and Heat of CO2 Absorption Analysis

Catalytic and noncatalytic CO2 abs‐desorption studies of MEA‐TETA‐DEEA/MEA‐TETA‐AMP tri‐solvents at specific blended ratios

Contact Info

Product

Resources

About

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis

Catalytic and noncatalytic CO₂ abs‐desorption studies of MEA‐TETA‐DEEA/MEA‐TETA‐AMP tri‐solvents at specific blended ratios