CO2 capture by aqueous amines and aqueous ammonia–A Comparison

Dave, N.; Do, Thong; Puxty, Graeme; Rowland, Robert; Feron, Paul; Attalla, Moetaz I.

doi:10.1016/j.egypro.2009.01.126

Cited by 110 publications

(41 citation statements)

References 3 publications

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“…However, the K G a, as obtained here, is in the range of 0.0136-0.3302 1/s, which is comparable with other solvents, such as MEA solvent which is in the range of 0.0342-0.881 1/s [28] and NaOH/BaCl 2 /H 2 O, which is in the ranges of 0.0651-0.3396 1/s [5] and 0.015-0.14 1/s for a stirred-tank scrubber using an aqueous ammonia solution as the scrubbing solution [4]. On the other hand, from data reported in literatures [8,13,26,27], the K G a can be recalculated for comparison. The recalculated values of wetted-wall column tests are 0.03469-0.2658 1/s [13] and 0.02551-0.4336 1/s [26], respectively; while the recalculated values for packed column are in the range of 0.486-2.43 1/s [8] when a specific area of packings, 500 m 2 /m 3 , is available.…”

Section: Effect Of Process Variables On the R A And K G Amentioning

confidence: 93%

“…In the case of using MEA as the absorbent, the absorbed carbon dioxide is stored in the liquid phase in a liquid state, which might be released again due to the influence of the pH value and the huge volume. Therefore, in some studies, MEA is changed to aqueous ammonia as the absorbent, which is used to absorb the carbon dioxide as reported in the literature [1,3,8].…”

Section: Introductionmentioning

confidence: 99%

“…aqueous ammonia as the absorbent, which is used to absorb the carbon dioxide as reported in the literature [1,3,8].…”

Section: Introductionmentioning

confidence: 99%

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CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

Chen

2018

Crystals

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A lab-scale bubble-column scrubber is used to capture CO 2 gas and produce ammonia bicarbonate (ABC) using aqueous ammonia as an absorbent under a constant pH and temperature. The CO 2 concentration is adjusted by mixing N 2 and CO 2 in the range of 15-60 vol % at 55 • C. The process variables are the pH of the solution, temperature, gas-flow rate and the concentration of gas. The effects of the process variables on the removal efficiency (E), absorption rate (R A ) and overall mass-transfer coefficient (K G a) were explored. A multiple-tube mass balance model was used to determine R A and K G a, in which R A and K G a were in the range of 2.14 × 10 −4 -1.09 × 10 −3 mol/(s·L) and 0.0136-0.5669 1/s, respectively. Results found that, R A showed an obvious increase with the increase in pH, inlet gas concentration and gas temperature, while K G a decreased with an increase in inlet gas concentration. Using linear regression, an empirical expression for K G a/E was obtained. On the other hand, ammonia bicarbonate crystals could be produced at a pH of 9.5 when the gas concentration was higher than 30% and γ (=F g /F A , the gas-liquid molar flow rate ratio) ≥ 1.5.

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Section: Effect Of Process Variables On the R A And K G Amentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

Chen

2018

Crystals

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“…However, it is expected that a considerable amount of additional energy is required to produce chilled water. Dave et al (2009) simulated the aqueous ammonia based process by keeping the flue gas and lean solvent temperatures to the absorber at 10°C and solvent concentration at 2.5 and 5 wt%. Effect of temperature on the CO 2 absorption rate and NH 3 loss rate in absorber 1 under similar conditions.…”

Section: Ammonia Lossmentioning

confidence: 99%

“…Currently, the commercially available PCC technology is mainly based on alkanol/alkyl amine solutions. A study by Dave et al (2009) shows that retrofitting a MEA based PCC plant to the existing/new mechanical draft water cooled black coal fired plants will reduce the power plant efficiency by 10 absolute percentage points and involves significant capital investment costs. Moreover, there is some concern about the formation of carcinogenic nitrosamines from the use of amines in PCC and their possible spread into the environment (MacDowell et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Aqueous Ammonia (NH₃) Based Post Combustion CO₂Capture: A Review

Yang

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Aqueous Ammonia (NH 3 ) Based Post Combustion CO 2 Capture: A Review -Aqueous ammonia (NH 3 ) is an emerging, promising and challenging solvent for capture of CO 2 emitted from coal and gas fired power stations and other industrial sources. Over the last few years, intensive research activities have been carried out to understand the thermo-chemical and physical properties of the CO 2 -NH 3 -H 2 O system and the chemistry/kinetics involved, to obtain information on absorption rate, ammonia loss, regeneration energies, and practical issues, and to assess the technical and economical feasibility of the aqueous ammonia based post combustion capture technologies. This paper reviews these research activities, makes comparisons with MonoEthanolAmine (MEA, the benchmark solvent) and identifies the research opportunities for further improvements.

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Total Resource Circulation of Desalination Brine: A Review

Lee,

Ho,

Chen

et al. 2024

Advanced Sustainable Systems

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Desalination brine is a concentrated stream that is generated during the desalination process. Brine commonly has high salinity and TDS (total dissolved ions), which contains ions such as Na+, K+, Ca2+, Mg2+, Cl−, SO42−, HCO3−, PO43−, and some critical elements. Currently, the brine treatment mainly applies direct disposal, like surface water discharge, sewer discharge, deep‐well injection, and evaporation ponds. However, these methods can cause harm to marine ecosystems, soil, and groundwater. Therefore, brine can be regarded as a resource to be reutilized. This work then aims to highlight the novel developments of brine application. For example, Na, Ca, and Mg in brine can be employed for carbon capture and utilization with ammonia, amines, and alkaline substances. With slight adjustment, brine can also be directly used as irrigation water, aquaculture water, and the activation of biochar. Furthermore, brine holds a higher concentration of critical elements, which makes many countries and scholars start to conduct element extraction, reducing the amount of ore exploitation. At last, the major obstacles related to these advancements in sustainability, expenses, and technological aspects are outlined, and promising research trends of brine reutilization are also suggested.

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CO2 capture by aqueous amines and aqueous ammonia–A Comparison

Cited by 110 publications

References 3 publications

CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

Aqueous Ammonia (NH₃) Based Post Combustion CO₂Capture: A Review

Total Resource Circulation of Desalination Brine: A Review

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CO2 capture by aqueous amines and aqueous ammonia–A Comparison

Cited by 110 publications

References 3 publications

CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

Aqueous Ammonia (NH3) Based Post Combustion CO2Capture: A Review

Total Resource Circulation of Desalination Brine: A Review

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Product

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Aqueous Ammonia (NH₃) Based Post Combustion CO₂Capture: A Review