The dynamic CO<sub>2</sub> adsorption of polyethylene polyamine-loaded MCM-41 before and after methoxypolyethylene glycol codispersion

Wang, Xia; Zeng, Wu-Lan; Zhang, Hongyan; Li, Dan; Tian, Hongjing; Hu, Xiude; Wu, Qian; Xin, Chengqi; Cao, Xiaoyu; Liu, Wenjing

doi:10.1039/c9ra05404a

Cited by 13 publications

(5 citation statements)

References 46 publications

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“…Shafawi et al (2021) have mentioned that the presence of N-functional groups will increase the surface basicity and polarity of the aminefunctionalized biochar, thus strengthening the adsorption of CO 2 molecules. This statement also agrees well with research work by Wang et al (2019), which also stated that nitrogen amount is frequently cited as the primary variable affecting the selectivity of CO 2 adsorption in carbon sorbents. Thus, this result q e q t k 2…”

Section: Selectivitysupporting

confidence: 92%

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

Zakaria,

Rozi,

Halim

et al. 2024

Environ Sci Pollut Res

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Environmental problems such as climate change and global warming caused by greenhouse gases, mainly CO 2, have become a worldwide topic of concern. Adsorption is a promising method for CO 2 capture. In this research, a series of amine functionalized on biochar based desiccated coconut waste (amine-biochar@DCW) namely ethylenediamine functionalized biochar@DCW (EDA-biochar@DCW), diethylenetriamine functionalized biochar@DCW (DETA-biochar@DCW), triethylenetetramine functionalized biochar@DCW (TETA-biochar@DCW), tetraethylenepentamine functionalized biochar@DCW (TEPA-biochar@DCW), and pentaethylenehexamine functionalized biochar@DCW (PEHAbiochar@DCW) adsorbents were synthesized and characterized. From the characterization analyses, series of amine-biochar@DCW adsorbents had better developed pore structure and larger speci c surface area than that of pristine desiccated coconut waste (DCW). Furthermore, the results showed that the increase percentage of elemental of C and N as well the presence peaks NH stretching, NH bending, CN stretching, and CN bending, revealing the presence of amine on the surface of biochar@DCW. From the CO 2 adsorption experiment, among amine modi ed biochar adsorbents, TETA-biochar@DCW had higher CO 2 adsorption capacity (61.78 mg/g) with mass ratio (m:m) of biochar@DCW:TETA (1:2). The adsorption kinetics on the TETA-biochar@DCW was best tted by the pseudo-second model, suggesting the adsorption process occurs through chemisorption. Additionally, TETA-biochar@DCW depicts high selectivity towards CO 2 gas and good reusability after ve CO 2 adsorption-desorption cycles.

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Section: Selectivitysupporting

confidence: 92%

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

Zakaria,

Rozi,

Halim

et al. 2024

Environ Sci Pollut Res

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“…However, the amount of N 2 sorbed by the modified samples decreases as a result of the amine group being an N 2 donor, which cannot adsorb more N 2 molecules since they are like charges (like charges repel). However, they have been reported to have a high affinity for CO 2 because it is an unlike charge that they can attract due to electrostatic forces [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

Optimization of CO2 Sorption onto Spent Shale with Diethylenetriamine (DETA) and Ethylenediamine (EDA)

et al. 2022

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A novel technique was employed to optimize the CO2 sorption performance of spent shale at elevated pressure–temperature (PT) conditions. Four samples of spent shale prepared from the pyrolysis of oil shale under an anoxic condition were further modified with diethylenetriamine (DETA) and ethylenediamine (EDA) through the impregnation technique to investigate the variations in their physicochemical characteristics and sorption performance. The textural and structural properties of the DETA- and EDA- modified samples revealed a decrease in the surface area from tens of m2/g to a unit of m2/g due to the amine group dispersing into the available pores, but the pore sizes drastically increased to macropores and led to the creation of micropores. The N–H and C–N bonds of amine noticed on the modified samples exhibit remarkable affinity for CO2 sequestration and are confirmed to be thermally stable at higher temperatures by thermogravimetric (TG) analysis. Furthermore, the maximum sorption capacity of the spent shale increased by about 100% with the DETA modification, and the equilibrium isotherm analyses confirmed the sorption performance to support heterogenous sorption in conjunction with both monolayer and multilayer coverage since they agreed with the Sips, Toth, Langmuir, and Freundlich models. The sorption kinetics confirm that the sorption process is not limited to diffusion, and both physisorption and chemisorption have also occurred. Furthermore, the heat of enthalpy reveals an endothermic reaction observed between the CO2 and amine-modified samples as a result of the chemical bond, which will require more energy to break down. This investigation reveals that optimization of spent shale with amine functional groups can enhance its sorption behavior and the amine-modified spent shale can be a promising sorbent for CO2 sequestration from impure steams of the natural gas.

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“…In spite of the relatively good adsorption performance for the grafted and impregnated porous sorbents, the low amine contents of aminosilanes and the agglomeration and weak volatility of liquid amines limited the adsorption capacity or amine efficiency. Thus, a combined method of either first grafting then impregnation was adopted [ 30 , 31 , 32 ], otherwise the additives were added during the impregnation of liquid amines into the supporting materials [ 33 , 34 , 35 , 36 , 37 ]. Sanz et al synthesized the pore-expanded MCM-41-based sorbents, respectively, by grafting with aminosilane of aminopropyl orethylenediamino, impregnating with liquid amine of PEI or tetraethylenepentamine (TEPA), and a double functionalization method of first grafting with aminosilane then impregnating with organic amine; the results showed that their corresponding maximum CO 2 adsorption capacity were respectively 1.75, 2.20 and 2.36 mmol/g, with amine efficiency separately being 0.38, 0.25 and 0.37 mol CO 2 /mol N, and a double functionalization method improved the dispersion and exposure of viscous amine [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study, the polyetheramine of poly(propylene glycol)bis(2-aminopropyl ether) (A) was chosen as the additive, and coimpregnated with TEPA into MCM-41 to prepare the composite CO 2 sorbents [ 33 ]. Due to the high electron cloud density around the O atoms in A and good dispersion of TEPA in pore channels, the composites exhibited not only good physisorption at 30 °C and ideal chemisorption at 60 °C, but also high desorption efficiency; methoxypolyethylene glycol (MPEG) was codispersed and coimpregnated with PEPA to prepare composite sorbents for CO 2 capture, in which the adsorption capacity and regeneration performance were improved with respect to that of PEPA-impregnated MCM-41 [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Additives on CO2 Adsorption of Polyethylene Polyamine-Loaded MCM-41

Wang,

Zeng,

et al. 2024

Molecules

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Organic amine-modified mesoporous carriers are considered potential CO2 sorbents, in which the CO2 adsorption performance was limited by the agglomeration and volatility of liquid amines. In this study, four additives of ether compounds were separately coimpregnated with polyethylene polyamine (PEPA) into MCM-41 to prepare the composite chemisorbents for CO2 adsorption. The textural pore properties, surface functional groups and elemental contents of N for MCM-41 before and after functionalization were characterized; the effects of the type and amount of additives, adsorption temperature and influent velocity on CO2 adsorption were investigated; the amine efficiency was calculated; and the adsorption kinetics and regeneration for the optimized sorbent were studied. For 40 wt.% PEPA-loaded MCM-41, the CO2 adsorption capacity and amine efficiency at 60 °C were 1.34 mmol/g and 0.18 mol CO2/mol N, when the influent velocity of the simulated flue gas was 30 mL/min, which reached 1.81 mmol/g and 0.23 mol CO2/mol N after coimpregnating 10 wt.% of 2-propoxyethanol (1E). The maximum adsorption capacity of 2.16 mmol/g appeared when the influent velocity of the simulated flue gas was 20 mL/min. In addition, the additive of 1E improved the regeneration and kinetics of PEPA-loaded MCM-41, and the CO2 adsorption process showed multiple adsorption routes.

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The dynamic CO₂ adsorption of polyethylene polyamine-loaded MCM-41 before and after methoxypolyethylene glycol codispersion

Abstract: To reduce the cost of CO2 capture, polyethylene polyamine (PEPA), with a high amino density and relatively low price, was loaded into MCM-41 to prepare solid sorbents for CO2 capture from flue gases.

Cited by 13 publications

References 46 publications

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

Optimization of CO2 Sorption onto Spent Shale with Diethylenetriamine (DETA) and Ethylenediamine (EDA)

Effect of Additives on CO2 Adsorption of Polyethylene Polyamine-Loaded MCM-41

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The dynamic CO2 adsorption of polyethylene polyamine-loaded MCM-41 before and after methoxypolyethylene glycol codispersion

Abstract: To reduce the cost of CO2 capture, polyethylene polyamine (PEPA), with a high amino density and relatively low price, was loaded into MCM-41 to prepare solid sorbents for CO2 capture from flue gases.

Cited by 13 publications

References 46 publications

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

New porous amine-functionalized biochar-based desiccated coconut waste as efficient CO2 adsorbents

Optimization of CO2 Sorption onto Spent Shale with Diethylenetriamine (DETA) and Ethylenediamine (EDA)

Effect of Additives on CO2 Adsorption of Polyethylene Polyamine-Loaded MCM-41

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The dynamic CO₂ adsorption of polyethylene polyamine-loaded MCM-41 before and after methoxypolyethylene glycol codispersion