A review on the selection criteria for slow and medium kinetic solvents used in CO2 absorption for natural gas purification

Shokrollahi, Fatemeh; Lau, Kok Keong; Partoon, Behzad; Smith, Aidan M.

doi:10.1016/j.jngse.2021.104390

Cited by 22 publications

(10 citation statements)

References 164 publications

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“…Given the fact that the keto tautomer of phloroglucinol is more stable than the enol form, [ 21 ] these results suggested the direct participation of phenolic hydroxyl group into the catalytic cycle of telomerization. Considering that tertiary amines were frequently applied as the absorbents for CO 2 capture, [ 22 ] we deduced that for the Pd/PPh 3 system, adding tertiary amine probably enhanced the CO 2 concentration of solution. Opposite to the significant promotion effect on the activity of Pd/PPh 3 system, adding tertiary amine exhibited unbeneficial impact on the activity of Pd/ L3 catalyst.…”

Section: Resultsmentioning

confidence: 99%

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

2022

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By introducing hydroxyl group into PPh 3 ligand, a promoter-free palladium catalytic system based on (p-HOC 6 H 4 )PPh 2 ligand was developed for the telomerization of 1,3-butadiene with CO 2 . High activity and selectivity towards CO 2 -incorporated divinyl δ-lactone monomer were achieved (TON/TOF: up to 4540/568 h -1; selectivity of δ-lactone and its isomers: up to 97%). The key role of phenolic hydroxyl group of the ligand in attaining high activity was validated. The good performance of large-scale reaction in batch reactor demonstrated the potential utility of this simple catalytic system in valorizing CO 2 with bulk chemical feedstock.

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Section: Resultsmentioning

confidence: 99%

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

2022

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“…Herein, k ov is a function of kinetic constants k 2.MDEA , k H2O , and k T−Im . The value of k 2.MDEA can direct be taken from literature 45,47,59,60…”

Section: Termolecular Mechanismmentioning

confidence: 99%

Kinetics Study and Modeling of CO₂ Capture in New Class Dual-Functionalized Ionic Liquid Blend Methyl Diethanolamine Absorbents

Tiwari,

Pant,

Upadhyayula

2024

Ind. Eng. Chem. Res.

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In the capture of CO2 through the absorption process, selecting the absorbent blend system based on the absorption kinetics is crucial. This study focuses on the kinetic investigation of two new lab-synthesized dual-functionalized ionic liquids (DFILs), namely, T-Im and D-Im, which were employed as promoters in low-reactive aqueous methyldiethanolamine (MDEA) solvent for making a highly CO2 absorbing blend system. Then, CO2 absorption kinetic performance of these blends was assessed across a temperature range of 303–328 K. The results indicated a significant enhancement in the initial absorption rate with an increase in the DFIL concentration (2.5–10 wt %). The overall rate constant (k ov) values were higher in the capture using these DFILs compared to those with the reported promoters such as monoethanolamine (MEA), diethanolamine (DEA), and piperazine (PZ). The absorption rate followed the Arrhenius law with an activation energy of 25.61 kJ/mol for T-Im/MDEA and 24.87 kJ/mol for D-Im/MDEA, respectively. 13C NMR characterization confirmed that carbamate formation increased with an increasing T-Im concentration in the blend. The rate kinetic was modeled using the termolecular, zwitterion, and base-catalyzed hydration mechanisms. The rate equations based on the zwitterion mechanism for the T-Im and D-Im blended absorbents were k 2 , normalT − I m = 2.242 × 10 9 exp ( − 3531.09 T ) and k 2 , normalD − I m = 1.11 × 10 9 exp ( − 3504.22 T ) , respectively. The accuracy of the rate kinetic models expressed in terms of average absolute deviation (AAD) was found to be in the range of 4 to 8%.

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“…Typical destruction methods include catalytic ozonation and biodegradation. − Many kinds of CVOCs such as chlorobenzene (CB) and dichloromethane (DCM) are commonly used as chemical raw materials or solvents in industry. , Thus, compared with destruction methods, recovery methods are in line with the concept of sustainable development. It is noteworthy that the solvent absorption method is widely used in gas purification processes, which has the advantages of recyclability, simple operation, large capacity, and mature technology …”

Section: Introductionmentioning

confidence: 99%

“…It is noteworthy that the solvent absorption method is widely used in gas purification processes, which has the advantages of recyclability, simple operation, large capacity, and mature technology. 16 At present, the absorbents used for the capture of CVOCs mainly contain high-boiling organic solvents or ionic liquids (ILs). Some high-boiling organic solvents are readily available and have a strong affinity for CVOCs.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Molecular Mechanism of Two Chlorinated Volatile Organic Compounds in Ionic Liquids

Gui

Lei

et al. 2023

Ind. Eng. Chem. Res.

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The structure−property relationship between ionic liquids (ILs) and two chlorinated volatile organic compounds (CVOCs), dichloromethane (DCM) and 1,2-dichloroethane (DCE), was systematically investigated. The suitable IL was screened using the COSMO-RS model, and 1-ethyl-3-methylimidazolium acetate [EMIM][Ac] was considered the optimal absorbent to capture the two CVOCs. The vapor−liquid equilibrium experiment demonstrates that the addition of the IL significantly reduces the vapor pressures of the IL + DCM (or DCE) systems. The structure of ILs on the absorption performance was investigated by absorption capacity experiments. Then, the absorption mechanism was investigated through QC calculations and wavefunction analysis. The consistency between the experiments and the molecular mechanism reveals that the formation of the hydrogen bond between the IL and CVOC enhances the absorption process.

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A review on the selection criteria for slow and medium kinetic solvents used in CO2 absorption for natural gas purification

Cited by 22 publications

References 164 publications

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

Kinetics Study and Modeling of CO₂ Capture in New Class Dual-Functionalized Ionic Liquid Blend Methyl Diethanolamine Absorbents

Experiment and Molecular Mechanism of Two Chlorinated Volatile Organic Compounds in Ionic Liquids

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A review on the selection criteria for slow and medium kinetic solvents used in CO2 absorption for natural gas purification

Cited by 22 publications

References 164 publications

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO2

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO2

Kinetics Study and Modeling of CO2 Capture in New Class Dual-Functionalized Ionic Liquid Blend Methyl Diethanolamine Absorbents

Experiment and Molecular Mechanism of Two Chlorinated Volatile Organic Compounds in Ionic Liquids

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Product

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Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

Hydroxyl Group‐Enabled Highly Efficient Ligand for Pd‐Catalyzed Telomerization of 1,3‐Butadiene with CO₂

Kinetics Study and Modeling of CO₂ Capture in New Class Dual-Functionalized Ionic Liquid Blend Methyl Diethanolamine Absorbents