Investigation of CO2 desorption kinetics in MDEA and MDEA+DEA rich amine solutions with thermo-gravimetric analysis method

Kang, Shunji; Shen, Xizhou; Yang, Wei

doi:10.1016/j.ijggc.2019.102947

Cited by 18 publications

(16 citation statements)

References 21 publications

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“…Among the several technologies for CO 2 capture from flue gases, aqueous amine solutions, such as monoethanolamine (MEA), methyldiethanolamine (MDEA), and 2-amino-2-methyl-1-propanol (AMP) have traditionally been used as chemical solvents to capture CO 2 by chemical absorption. − They exhibit excellent absorption capacity, high reactivity, high selectivity, and low price . However, they are not environment friendly due to their toxicity, partial degradation, high vapor pressure, corrosive byproduct formation, intensive energy consumption, and high uptake costs.…”

Section: Introductionmentioning

confidence: 99%

Gas Solubility Using Deep Eutectic Solvents: Review and Analysis

Pelaquim

Neto

Dalmolin

et al. 2021

Ind. Eng. Chem. Res.

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The increasing global levels of anthropogenic greenhouse gases (GHGs), especially CO 2 emissions, have caused environmental problems that impact humanity and the ecosystems. Therefore, gas capture and storage are a feasible solution to this global issue. Some aqueous amine solutions, such as monoethanolamine (MEA), have been used to capture GHGs, but they are not environment friendly. Research on greener solvents for this task led to deep eutectic solvents (DESs) as a novel option. This review explores the applications of different DESs; compares the differences between gas solubility methodologies; and studies the interference of the DESs' molar ratio, the influence of HBA and HBD, and the differences between the solubility of some gases in these solvents. More than 40 DESs have been analyzed; however, some gaps need to be filled, such as data for gas solubility under higher pressures and thermodynamic modeling of experimental data.

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Section: Introductionmentioning

confidence: 99%

Gas Solubility Using Deep Eutectic Solvents: Review and Analysis

Pelaquim

Neto

Dalmolin

et al. 2021

Ind. Eng. Chem. Res.

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“…The component material balance can be found as follows: (19) where xf, xD, and xB are the distillate compositions in the feed, distillate, and residue, respectively. The overall heat balance can be found as follows: (20) where Qr and Qc are the reboiler duty and condenser duty, respectively, and hf, hd, and hB are the specific enthalpies (J/kg) for the feed, distillate, and residue, respectively. (23) Here, λmix and λ steam are the latent heat of vaporization (J/kg) values for the overhead mixture and reboiler steam, respectively [31].…”

Section: Detailed Equipment Equations 281 Distillation (Stripper)mentioning

confidence: 99%

“…in the case of SRU plants the MDEA solvent is used to absorb H2S and desorb CO2. MDEA is regenerated and the stripped H2S is recycled again to the SRU feed [15,[17][18][19][20]. The world's fastest expanding population lead to a dramatic increase in energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

2021

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Process sour water produced from refinery contains some hazardous pollutants as (H2S and NH3). Sour water stripper units remove both compounds from water. The two stripped pollutants are sent to Sulphur recovery unit to produce Sulphur and prevent any acidic emissions against environmental regulations. The sour water stripper unit serving the delayed Coker unit was simulated with Aspen HYSYS V.11 and an exergy study was conducted on different equipment. While energy is transformed from a form to another, exergy is destructed in an irreversible process. The total exergy is equal to physical and chemical exergies. Physical exergy is calculated through HYSYS and chemical exergy is calculated through a series of equations embedded in excel. The exergy destruction rates, the destruction efficiency and the percentage share of the destruction of each equipment was calculated. The total unit destruction rate was 2996.25 kW. The stripper showed the highest destruction rate 2592.23 kW and a percentage share of 86.52 % of total destruction. The overall efficiency of exergy is 81.58%. A comparison was conducted between the exergy results of this study with two other exergy studies performed in the same refinery plant. The columns in the three studies showed the highest destruction rates exceeding 78% of the total destruction of each unit. The air coolers showed the second-highest destruction rates in their units with a percentage share exceeding 7% of total destruction. The pumps showed the lowest destruction rates with values of less than 1% of the total destruction of each unit.

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“…Aqueous solutions of MDEA and DEA are widely used in industrial treatment, especially for acid gas streams containing H 2 S and CO 2 . MDEA has high selectivity for H 2 S rather than CO 2 ; therefore, in the presence of both acid gases, MDEA is used to absorb H 2 S and desorb CO 2 , while DEA is usually used if H 2 S is by itself [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Ibrahim

Ashour

Gadalla

2021

Heliyon

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Refinery plants use diethanolamine (DEA) solutions for gas sweetening. The role of DEA is to absorb H 2 S from sour gas. Amine Regeneration Units (ARU) are used to regenerate the rich Amine with H 2 S from refinery units to Lean Amine. An ARU unit of a Middle Eastern refinery that began official production in 2020 was simulated using Aspen HYSYS V.11, and an exergy study was conducted on different equipment. Whereas energy is transformed from one form to another, the exergy is destroyed in an irreversible process. The total exergy was equal to the physical and chemical exergy. The physical exergy was calculated using HYSYS, and the chemical exergy was calculated using a series of equations embedded in Excel. The DEA concentration used was 25 wt%. The exergy destruction rates, destruction efficiency, and percentage share of destruction of each piece of equipment were calculated. The regenerator exhibited the highest destruction rate of 13459.73 kW, and a percentage share of 79.61% of the total destruction. The overall exergy efficiency was 99.7%. The DEA concentration decreased from 25% to 20% as a result of system losses during start-up. Therefore, a case study was conducted to test the effect of this decrease in the H 2 S concentration in the sweet gas, and no effect was observed. An exergy study was conducted using an DEA of 20%. The distribution of the equipment destruction did not change. The total destruction loss increased by 2057.08 kW. From the exergy and operation point of view, the best scenario was to use a 25% concentration, to prevent destruction losses and operation problems.

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Investigation of CO2 desorption kinetics in MDEA and MDEA+DEA rich amine solutions with thermo-gravimetric analysis method

Cited by 18 publications

References 21 publications

Gas Solubility Using Deep Eutectic Solvents: Review and Analysis

Gas Solubility Using Deep Eutectic Solvents: Review and Analysis

Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

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