Performance of an ammonia-based CO2 capture pilot facility in iron and steel industry

Han, Kunwoo; Ahn, Chi Kyu; Lee, Man Su

doi:10.1016/j.ijggc.2014.05.014

Cited by 71 publications

(27 citation statements)

References 15 publications

(18 reference statements)

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“…Therefore, the issues of CO 2 have attracted great attention with the most attention on the CO 2 emission of coal fired power plants and steel plants [1]. There are two main kinds of CO 2 capturing methods currently under study, namely, pre-combustion and post-combustion [2].…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…Another advantage is that an aqueous ammonia solution can be used to simultaneously remove CO2, SO2 and NOx [12]. Moreover, the other reasons for using aqueous ammonia as an absorbent solution are due to its high CO2 loading capacity, low regeneration energy at a relatively low temperature (~8 °C) and reuse of ammonia and stripped water vapor for the distillation of aqueous carbonated ammonia [1,4,13]. The CO2 absorption process using aqueous ammonia solution depends on the temperature, ion concentration and pH value of the solution where more carbon dioxide is absorbed at a higher pH value and more ammonia is created [3,14].…”

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: Introductionmentioning

confidence: 99%

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%

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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“…More precisely, it is composed of the heat required for evaporating the solvent ( Q vap ), the sensible heat to heat up the solvent to reboiler temperature ( Q sh ), and the heat of CO 2 desorption ( Q des ). The heat required to evaporate the solvent ( Q vap ) is actually equivalent to the latent heat of solvent condensation which can be measured directly around the condenser ( Q cond ) as follows :

\begin{matrix} left Q_{re}_{g} = Q_{vap} + Q_{sh} + Q_{des} \\ left = Q_{cond} + Q_{sh} + Q_{des} \\ = m_{w} Δ H_{w} + m_{s} C_{p} (T_{bottom} - T_{top}) + m_{CO 2} Δ H_{CO 2} \end{matrix}

where m w is the amount of water or methanol flowing into the condenser; Δ H w is the latent heat of water or methanol condensation; m s is the solvent flow rate; C p is the heat capacity of the solvent; T bottom is the temperature of hot lean solvent going out from the bottom of stripper column; T top is the temperature of hot rich solvent entering the top of stripper column; m CO2 is the amount of CO 2 produced from the stripper column and Δ H CO2 is the enthalpy of CO 2 desorption.…”

Section: Methodsmentioning

confidence: 99%

Experimental study of regeneration performance for CO₂desorption from a hybrid solvent MEA‐methanol in a stripper column packed with three different packing: Sulzer BX500, mellapale Y500 and pall rings 16 × 16

Gao

Yin

Zhu

et al. 2017

Env Prog and Sustain Energy

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The regeneration heat duty (Qreg, MJ/kg CO2) which consists of solvent heating energy (Qsh, MJ/kg CO2), solvent vaporization energy (Qvap, MJ/kg CO2), and desorption energy (Qdes, MJ/kg CO2), is a critical parameter in evaluating the performance of a solvent for postcombustion CO2 capture. In this study, Qreg of CO2 desorption from rich monoethanolamine (MEA)‐methanol solvent was experimentally evaluated in a pilot‐plant stripper packed with Sulzer packing BX500, Mellapale packing Y500 and Pall rings 16 × 16. And a comparison of Qreg between MEA‐methanol and aqueous MEA solvent was performed to evaluate the potential for MEA‐methanol's application in industrial CO2 capture process. Also effects of several operating parameters of the stripper consists of rich CO2 loading (0.25–0.52 mol/mol), rich solvent flow rate (21.2–51.4 L/h), rich solvent temperature (40–60°C) and regeneration temperature (68–74°C) on the regeneration performance of the stripper were studied. It was found that Qreg of MEA‐methanol solvent was lower than aqueous MEA solvent (especially Qdes) and Qreg was sensitive to all the four parameters. Also the results obtained in this work showed that the stripper performance of Sulzer BX500 packing was better than Mellapale Y500 packing and Pall rings 16 × 16 packing was the worst. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 838–844, 2017

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Design and study of a novel ammonia‐based CO₂ capture process with bipolar membrane electrodialysis

Song,

Sun,

Wang

et al. 2023

Can J Chem Eng

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Aqueous ammonia is a promising absorbent in the field of post combustion CO2 capture. However, the high volatilization of NH3 results in a high energy requirement, as well as solid precipitation during the CO2 regeneration process. A novel process was designed to reduce energy consumption and solve the problem. The bipolar membrane electrodialysis (EDBM) unit and CO2 regeneration reactor were taken as the regeneration part. In the novel process, the bubble in the EDBM unit would be eliminated, and the regeneration of CO2 and aqueous ammonia would be operated separately, which significantly reduced energy consumption and avoided the risk of precipitation during regeneration. According to the simulation and calculation results, the CO2 regeneration energy consumption of the novel process using H2SO4 for CO2 regeneration is 39.0% lower than that of the conventional ammonia‐based process, which shows good energy saving potential. Moreover, the novel process will be more competitive as membrane technology develops.

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Performance of an ammonia-based CO2 capture pilot facility in iron and steel industry

Cited by 71 publications

References 15 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

Experimental study of regeneration performance for CO₂desorption from a hybrid solvent MEA‐methanol in a stripper column packed with three different packing: Sulzer BX500, mellapale Y500 and pall rings 16 × 16

Design and study of a novel ammonia‐based CO₂ capture process with bipolar membrane electrodialysis

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Performance of an ammonia-based CO2 capture pilot facility in iron and steel industry

Cited by 71 publications

References 15 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

Experimental study of regeneration performance for CO2desorption from a hybrid solvent MEA‐methanol in a stripper column packed with three different packing: Sulzer BX500, mellapale Y500 and pall rings 16 × 16

Design and study of a novel ammonia‐based CO2 capture process with bipolar membrane electrodialysis

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Experimental study of regeneration performance for CO₂desorption from a hybrid solvent MEA‐methanol in a stripper column packed with three different packing: Sulzer BX500, mellapale Y500 and pall rings 16 × 16

Design and study of a novel ammonia‐based CO₂ capture process with bipolar membrane electrodialysis