Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant

Баженов, С. Л.; Rieder, Alexander; Schallert, B.; Vasilevsky, Vladimir; Unterberger, S.; Грушевенко, Е. А.; Волков, В. В.; Волков, А. В.

doi:10.1016/j.ijggc.2015.09.015

Cited by 30 publications

(20 citation statements)

References 27 publications

(26 reference statements)

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“…Similarly, ED can regenerate spent alkanolamine absorbents for CO 2 . Pilot-scale studies were conducted with a spent solution at 30 wt% monoethanolamine, showing stable performances during long-term operations [294]. The effect of CO 2 loading (from 0 to 0.2 mole/mole amine) on heat stable salts (48 meq/L) removal from monoethanolamine-based solvent (30 wt%) was studied by two-stage ED [295] ( Figure 17).…”

Section: Spent Solutions From Chemical Absorption Of Flue Gasesmentioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and other treatments with significant environmental benefits. ED technologies can be used in operations of concentration, dilution, desalination, regeneration, and valorisation to reclaim wastewater and recover water and/or other products, e.g., heavy metal ions, salts, acids/bases, nutrients, and organics, or electrical energy. Intense research activity has been directed towards developing enhanced or novel systems, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive. Despite few real plants having been installed, recent developments are opening new routes for the large-scale use of ED techniques in a plethora of treatment processes for wastewater.

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Section: Spent Solutions From Chemical Absorption Of Flue Gasesmentioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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“…They found that ED is useful in removing anions and cations, but it can also cause absorbent losses during the process [ 21 ]. Bazhenov et al [ 22 ] studied the removal of HSS during the reclaiming of degraded monoethanolamine (MEA) solutions by ED in a pilot plant. They found that ED provides quite a uniform removal of HSS ions regardless of the nature of anions, but ED is unable to remove heavy metal.…”

Section: Introductionmentioning

confidence: 99%

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

et al. 2020

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This study presents an efficient and scalable process for removing the heat-stable salts (HSS) ions from amine solution while recovering methyl diethanolamine (MDEA) solution for its reuse in gas sweetening plants. The presence of HSS in the amine solution causes the loss of solvent capacity, foaming, fouling, and corrosion in gas sweetening units so their removal is crucial for a more well-performing process. Furthermore, the recovery of the amine solution can make the sweetening step a more sustainable process. In this study, for the first time, the removal of a multicomponent mixture of HSS from MDEA solution was investigated via a nanofiltration process using flat-sheet NF-3 membranes. The impact of operating parameters on salts and amine rejection, and flux, including the operating pressure, HSS ions concentration, and MDEA concentration in the feed solution was investigated. Results based on the nanofiltration of an amine stream with the same composition (45 wt.% MDEA solution) as that circulating in a local gas refinery (Ilam Gas refinery), demonstrated a removal efficiency of HSS ions in the range from 75 to 80% and a MDEA rejection of 0% indicating the possibility of reusing this stream in the new step of gas sweetening.

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“…The accumulation of HSS in the absorption system leads to such operational problems as the decrease of the absorbent CO 2 capacity and change in its physicochemical properties, increase in the corrosiveness and consequent clogging and equipment erosion [5]. HSS can be removed from the amine solvent by means of distillation (process by Gazprom VNIIGAZ [6] and CCR Technologies Ltd. [7]), ion exchange (process MPR CCAR™ and AmiPur ® –CCS by MPR Servises, Inc and Eco-Tec, correspondingly [8]) or electrodialysis [9,10,11,12,13,14,15,16]. The distillation process enables to remove all major impurities, but it is an energy-intensive process since HSS together with other non-volatile products of degradation (e.g., resins) are accumulated in the bottom residue, while the most of alkanolamine and water are evaporated.…”

Section: Introductionmentioning

confidence: 99%

“…The distillation process enables to remove all major impurities, but it is an energy-intensive process since HSS together with other non-volatile products of degradation (e.g., resins) are accumulated in the bottom residue, while the most of alkanolamine and water are evaporated. At the same time, the amine solvents can be reclaimed without phase change by ion-exchange [8,17,18,19] or electrodialysis (ED) [12,13,14,15,16]. Electrodialysis possesses several advantages typical for membrane processes: compactness, modularity, the flexibility of exploitation and easiness of upscaling [20,21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis

et al. 2019

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Heat stable salts (HSS) formed and continuously accumulated in the amine-based solvents due to solvent degradation and impurities in the feed gas can dramatically change the efficiency of the amine scrubbing process. HSS can be removed by using different methods including membrane separation such as electrodialysis (ED). In this work, we studied the effect of CO2 loading of the lean 30 wt % monoethanolamine (MEA) solution on the efficiency of HSS removal and MEA loss. In the model MEA solution containing HSS on the level of 48 meq/L, the carbon dioxide concentration was varied from 0.2 down to 0 mole (CO2)/mole (MEA). The reclaiming of model MEA solution was carried out by lab-scale two-stage ED unit when the concentrate stream after the first stage was additionally treated using ED (second stage) that allowed reducing MEA loss. It was shown that the decrease of carbon dioxide content from 0.2 down to 0 mole (CO2)/mole (MEA) resulted in a substantial reduction of both parameters—the MEA loss and the specific power consumption with respect to extracted HSS (from 140 down 37 kJ per 1 g of recovered HSS anions). This can be explained by the drop in the total concentration of ions formed by the interaction of MEA solution with carbon dioxide. However, the change of CO2 loading is associated with additional power consumption towards further solvent regeneration in the column. Based on the preliminary estimations of power consumption required for additional CO2 stripping with the respect to the power consumption of ED stage, it seems that lean solvent CO2 loading of 0.1 mole/mole provides an optimum for the power input at 25.9 MJ/kg(solvent).

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Reclaiming of degraded MEA solutions by electrodialysis: Results of ED pilot campaign at post-combustion CO 2 capture pilot plant

Cited by 30 publications

References 27 publications

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis

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