Density studies of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-glycerol and CO2-DBU-glycerol solutions at temperatures between 288.15 K and 328.15 K

Lin, Si Jian; Lu, Houfang; Liu, Yingying; Liu, Changjun; Liang, Bin; Wu, Kejing

doi:10.1016/j.jct.2018.03.017

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…When DBU-glycerol solution was used as an absorbent, considering the high boiling points of DBU and glycerol, CO 2 absorbed by the solvent can be calculated by the mass difference before and after the absorption, which is calculated as follows: …”

Section: Methodsmentioning

confidence: 99%

“…Compared with 1-propanol and 1-hexanol, , higher boiling points of DBU and glycerol than 1-propanol (97 °C) and 1-hexanol (157 °C) are preferred due to less evaporation of solvent. The physicochemical properties, such as the density, viscosity, conductivity, and surface tension, as well as the CO 2 solubility of the resultant DBU-glycerol solution have been well investigated. − This work focused on the performance of DBU-glycerol solvent in CO 2 absorption and desorption processes. The effect of solvent composition, operation temperature, and the cyclic absorption–desorption performance of the DBU-glycerol solvent were systemically investigated.…”

Section: Introductionmentioning

confidence: 99%

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DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy

Zhu

et al. 2020

Environ. Sci. Technol.

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1,.0]-undec-7-ene (DBU)-glycerol solution is employed as a promising CO 2 absorbent. The regeneration of the CO 2 -loaded solution is of vital importance for its commercialization. It was investigated and compared with 30 wt % monoethanolamine (MEA). Variables affecting the absorption and desorption processes were studied, including the solvent composition, reaction temperature, and agitation. It shows that the absorption capacity for DBU-glycerol is comparable with 30 wt % MEA, and the desorption ratio for CO 2 -loaded DBU-glycerol mixture can reach as high as 95% in 60 min, 363 K at the 3:1 molar ratio of DBU to glycerol, while it is only 68% even after 165 min for CO 2 -saturated 30 wt % MEA. DBU-glycerol solution has higher cycling CO 2 loading than 30 wt % MEA. Its cyclic capacity could keep above 90% after 10 cycles of absorption−desorption experiments. The desorption reaction is irreversible at the initial stage, and the reaction rate is expected as a first-order reaction from 349 to 377 K, and the apparent activation energy is 68.94 kJ/mol. Moreover, the heat duty of the reboiler during regeneration is estimated to be reduced by about 27% when compared with 30 wt % MEA.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy

Zhu

et al. 2020

Environ. Sci. Technol.

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“…For the carbon dioxide (CO 2 ) capture process, amine-based chemical absorption is one of the most widely used methods. − However, because of the highly alkaline, highly viscous, and high energy consumption of amine, water, alcohol, and other solvents , are usually introduced into the amine absorbent to improve the kinetic rates, reduce equipment corrosion, or enhance the efficiency. Hence, the thermodynamic properties of the binary mixtures containing amine are important to the CO 2 capture process.…”

Section: Introductionmentioning

confidence: 99%

Volumetric Properties of a Binary Mixture Composed of N,N-Dimethylcyclohexylamine and Alcohols

et al. 2020

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The densities of six binary systems containing N,N-dimethylcyclohexylamine (DMCA) and ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol, or tert-butanol were reported in this work at temperatures ranging from (288.15 to 318.15) K and atmospheric pressure. According to the experimental density values, molar volume (V m), thermal expansion coefficient (α p ), and excess molar volume (V m E) were calculated. The results showed that V m E values were all negative over the entire composition. The minimum values of the six systems at 298.15 K were located at (−1.097, −1.094, −0.900, −1.033, −1.154, and −1.073) cm3·mol–1 at about x DMCA = 0.4, respectively. All these are dependent on intermolecular interactions and the steric structural effect. Furthermore, V m E variations with composition (x DMCA) as well as temperature were well fitted with the Redlich–Kister-type polynomial equation.

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“…Chemical physical properties of neat DBU [37][38][39] The interatomic potential chosen for this study succeeds in describing the experimental diffraction data (see Figure 4) and the correspondingly generated MD trajectories are then reliably used to account for structural properties of these systems.…”

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confidence: 99%

Structural features of selected protic ionic liquids based on a super-strong base

Triolo

Celso

Ottaviani

et al. 2019

Phys. Chem. Chem. Phys.

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Density studies of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-glycerol and CO2-DBU-glycerol solutions at temperatures between 288.15 K and 328.15 K

Cited by 13 publications

References 36 publications

DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy

DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy

Volumetric Properties of a Binary Mixture Composed of N,N-Dimethylcyclohexylamine and Alcohols

Structural features of selected protic ionic liquids based on a super-strong base

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Density studies of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-glycerol and CO2-DBU-glycerol solutions at temperatures between 288.15 K and 328.15 K

Cited by 13 publications

References 36 publications

DBU-Glycerol Solution: A CO2 Absorbent with High Desorption Ratio and Low Regeneration Energy

DBU-Glycerol Solution: A CO2 Absorbent with High Desorption Ratio and Low Regeneration Energy

Volumetric Properties of a Binary Mixture Composed of N,N-Dimethylcyclohexylamine and Alcohols

Structural features of selected protic ionic liquids based on a super-strong base

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Product

Resources

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Density studies of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-glycerol and CO2-DBU-glycerol solutions at temperatures between 288.15 K and 328.15 K

DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy

DBU-Glycerol Solution: A CO₂ Absorbent with High Desorption Ratio and Low Regeneration Energy