Pentaethylenehexamine-C60 for Temperature Consistent Carbon Capture

Fabiano, Thales Albuquerque; Soares, Vanessa Pavanelo; Andreoli, Enrico

doi:10.3390/c1010016

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…Two other absorption bands, 2818 cm -1 and 2934 cm -1 , were also identified which refer to the symmetrical and asymmetric stretches of CH 2 , respectively. The presence of these bands suggests that the amine PEHA was introduced into the material and have also been reported by 42,55,56 . It is visible from the figures that Ti/M1-P has more pronounced bands referring to the amine group, thus indicating that this sample has higher amine content than the other samples.…”

Section: Ftirsupporting

confidence: 73%

Development of Silica-Based Monoliths for the Capture of CO2

2019

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The synthesis of mesoporous materials in macroscopic scale, as for example, the monoliths, has been of great interest in view of the wide range of applications that this material holds. Thus, this work consists of the production of silica monoliths for the purpose of they being used in the carbon dioxide (CO 2) adsorption process. The adsorbents were prepared in pure form and also with addition of heteroatoms: Al, Ti and Zr. The samples were then functionalized with pentaethylenehexamine (PEHA) by the wet impregnation method. The materials were characterized by the following techniques: X-ray diffraction (XRD), textural analysis, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Thermogravimetry (TG/DTG). The analyses indicated that the materials synthesized with heteroatom incorporation presented a disordered pore structure and high surface area (1387 m 2 /g for sample Ti/M1). In addition, they showed a significant increase in adsorption of CO 2 relative to their parent sample, a fact that is not much explored in the literature. The CO 2 adsorption performance tests were carried out at 30 ºC and atmospheric pressure. All functionalized materials demonstrated improved CO 2 adsorption capacity relative to their starting samples. Adsorption capacities up to 111.3 mg/g were found in this work, which makes the materials developed promising candidates for the capture of CO 2 .

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Section: Ftirsupporting

confidence: 73%

Development of Silica-Based Monoliths for the Capture of CO2

2019

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“…Recently, pentaethylenehexamine (PEHA), which has two primary and four secondary amine groups in the structure (Figure ), has been used as the modifier to synthesize solid amine-based sorbents for CO 2 adsorption due to its high amine group content per unit mass, high thermal stability, and low toxicity. − Nevertheless, there is little detailed information available on the CO 2 capture performance of aqueous PEHA. To the best of our knowledge, only three publications − mentioned the utilization of the water-PEHA system for CO 2 absorption.…”

Section: Introductionmentioning

confidence: 99%

Switchable Aqueous Pentaethylenehexamine System for CO₂ Capture: An Alternative Technology with Industrial Potential

Bui

Khokarale

Shukla

et al. 2018

ACS Sustainable Chem. Eng.

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Herein we report the application of polyamine pentaethylenehexamine (PEHA, 3,6,9,12-tetraazatetradecane-1,14-diamine) in CO2 absorption with both neat PEHA and aqueous solutions thereof. The absorption of molecular CO2 in pure PEHA and in PEHA-water systems resulted in the formation of two chemical species, namely, PEHA carbamate and bicarbonate. It was observed that, upon formation of these species, both the CO2 absorption capacity and CO2 absorption rate were controlled by the amount of water in the system. During the CO2 absorption, the neat PEHA and 92 wt % PEHA were capable of forming carbamate species only while other aqueous analogues with higher dilution allowed for the formation of both carbamate and bicarbonate species upon exceeding 8 wt % water in the mixture. The CO2 uptake steadily increased with an increase in the water concentration in the solvent mixture and reached the maximum value of 0.25 g of CO2/(g of solvent) in the case of 56 wt % PEHA in water. However, in the case of more dilute systems (i.e., <56 wt % PEHA in water), the trend reversed and the CO2 loading decreased linearly to 0.05 g of CO2/(g of solvent) for 11 wt % PEHA in water. Meanwhile, it usually took shorter time to achieve the full CO2 absorption capacity (equilibrium) with increasing water content in all cases. The 13C NMR analysis was used to quantify the relative amount of PEHA carbamate and bicarbonate, respectively, in reaction mixtures. The Kamlet–Taft parameters (α, β, and π*) of aqueous solutions for different concentrations of PEHA were also studied taking advantage of various solvatochromic dyes and correlated with the CO2 absorption capacity. The thermally induced switchable nature of CO2-saturated neat and aqueous PEHA solutions for transformation of ionic PEHA carbamate and bicarbonate moieties to molecular PEHA is also represented. A comparison between aqueous PEHA and aqueous monoethanolamine (industrial solvent) for CO2 capture is reported. Hence, most importantly, a switchable PEHA system is demonstrated for reversible CO2 absorption processes.

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“…Compared with solvent absorption and membrane separation, solid adsorption has many potential advantages for CO 2 capture, such as high capacity, good selectivity, and easy processing [ 13 ]. In the last few years, new solid CO 2 capture sorbents with excellent performance and cost efficiency have been developed [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. To improve the CO 2 selectivity and adsorption capacity, a variety of micro-meso-porous materials loaded with basic nitrogen functionalities have been found to be very promising [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Pentaethylenehexamine-Loaded Hierarchically Porous Silica for CO2 Adsorption

Huang

et al. 2016

Materials

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Recently, amine-functionalized materials as a prospective chemical sorbent for post combustion CO2 capture have gained great interest. However, the amine grafting for the traditional MCM-41, SBA-15, pore-expanded MCM-41 or SBA-15 supports can cause the pore volume and specific surface area of sorbents to decrease, significantly affecting the CO2 adsorption-desorption dynamics. To overcome this issue, hierarchical porous silica with interparticle macropores and long-range ordering mesopores was prepared and impregnated with pentaethylenehexamine. The pore structure and amino functional group content of the modified silicas were analyzed by scanning electron microscope, transmission electron microscope, N2 adsorption, X-ray powder diffraction, and Fourier transform infrared spectra. Moreover, the effects of the pore structure as well as the amount of PEHA loading of the samples on the CO2 adsorption capacity were investigated in a fixed-bed adsorption system. The CO2 adsorption capacity reached 4.5 mmol CO2/(g of adsorbent) for HPS−PEHA-70 at 75 °C. Further, the adsorption capacity for HPS-PEHA-70 was steady after a total of 15 adsorption-desorption cycles.

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Pentaethylenehexamine-C60 for Temperature Consistent Carbon Capture

Cited by 7 publications

References 16 publications

Development of Silica-Based Monoliths for the Capture of CO2

Development of Silica-Based Monoliths for the Capture of CO2

Switchable Aqueous Pentaethylenehexamine System for CO₂ Capture: An Alternative Technology with Industrial Potential

Pentaethylenehexamine-Loaded Hierarchically Porous Silica for CO2 Adsorption

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Pentaethylenehexamine-C60 for Temperature Consistent Carbon Capture

Cited by 7 publications

References 16 publications

Development of Silica-Based Monoliths for the Capture of CO2

Development of Silica-Based Monoliths for the Capture of CO2

Switchable Aqueous Pentaethylenehexamine System for CO2 Capture: An Alternative Technology with Industrial Potential

Pentaethylenehexamine-Loaded Hierarchically Porous Silica for CO2 Adsorption

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Product

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Switchable Aqueous Pentaethylenehexamine System for CO₂ Capture: An Alternative Technology with Industrial Potential