A comparative study of CO<sub>2</sub>capture by amine grafted vs amine impregnated zeolite 4A

Panda, Debashis; Singh, Sanjay Kumar; Kumar, E. Anil

doi:10.1088/1757-899x/377/1/012148

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…Amine incorporation gave rise to new peaks, in addition to the original 1000 cm −1 band attributed to the Si–O stretching vibration of the Si–O–Si structure and 750 cm −1 peak due to Al–O–Al groups of zeolites [ 11 , 22 , 25 , 32 , 35 , 48 , 49 , 50 , 51 , 52 , 53 ]. These bands rather appeared as barely detectable shoulders at 1250–1020 cm −1 (C–N-bond stretching) and 910–665 cm −1 (N–H wagging).…”

Section: Resultsmentioning

confidence: 99%

“…The resulting mixture was continuously and vigorously stirred for 12 h at room temperature (RT), then dried under vacuum at 60 °C for ca. 45 min, according to previous works [ 25 , 34 , 51 , 53 ]. CO 2 capture tests on all modified zeolites allowed for the selection of NaP1 containing 1% DAP, denoted as NaP1-DAP-1, as being the most efficient adsorbent for CO 2 ( Table 3 ).…”

Section: Methodsmentioning

confidence: 99%

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Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Beltrão-Nunes,

Pires,

Roy

et al. 2024

Molecules

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Zeolite NaP1 was found to display the highest affinity for CO2 in preliminary modifications of coal fly ash-derived zeolites (4A, Y, NaP1 and X) by four amines (1,3-diaminopropane, N,N,N′,N′-tetramethylethylenediamine, Tris(2-aminoethyl)amine and ethylenediamine). In the second step, different fatty acid loaded NaP1 samples were prepared using palmitic, oleic and lauric acids. CO2 and H2O thermal programmed desorption (TPD) revealed changes in intrinsic basicity and hydrophilic character, expressed in terms of CO2 and H2O retention capacity (CRC and WRC, respectively). Infrared spectroscopy (IR), N2 adsorption-desorption isotherms and scanning electron microscopy allowed for correlating these changes with the type of interactions between the incorporated species and the zeolite surface. The highest CRC values and the lowest CO2 desorption temperatures were registered for NaP1 with the optimum content in palmitic acid (PA) and were explained in terms of the shading effect of surface acidity by the rise of basic Na+-palmitate salt upon cation exchange. The amine/fatty acid combination was found to paradoxically mitigate this beneficial effect of PA incorporation. These results are of great interest because they demonstrate that fatty acid incorporation is an interesting strategy for reversible CO2 capture.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Beltrão-Nunes,

Pires,

Roy

et al. 2024

Molecules

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“…In addition to temperature and pressure, the amount of amine loaded on the support material, the pore size, the pore volume, the surface area and the interconnection of the pores are also factors affecting CO 2 uptake 66–71 . Among the support properties, the pore size is more important in mass transfer, as the pore size decreases by amine loading the resistance to CO 2 mass transfer increases, 40,72 and CO 2 capture by amine impregnated sorbents becomes diffusion controlled 73,74 . Consequently, capturing of CO 2 by an amine impregnated porous support depends on the diffusion of CO 2 molecules ( D am ), reaction products, and un‐reacted amine molecules in the bulk of the amine solution.…”

Section: Resultsmentioning

confidence: 99%

“…[66][67][68][69][70][71] Among the support properties, the pore size is more important in mass transfer, as the pore size decreases by amine loading the resistance to CO 2 mass transfer increases, 40,72 and CO 2 capture by amine impregnated sorbents becomes diffusion controlled. 73,74 Consequently, capturing of CO 2 by an amine impregnated porous support depends on the diffusion of CO 2 molecules (D am ), reaction products, and un-reacted amine molecules in the bulk of the amine solution. According to Eqn.…”

Section: Co 2 Adsorption By Amine-loaded Adsorbentsmentioning

confidence: 99%

Adsorptive capture of CO₂ by amine‐impregnated activated carbon, pumice, and zeolite 4A

2022

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This study provides comparative information about CO2 capture of raw and amine‐impregnated micro‐, meso‐, and macroporous support materials. Zeolite 4A (4A), activated carbon (AC), and pumice (P) were used as micro‐, meso‐, and macroporous support materials, respectively, and monoethanolamine (MEA) and diethanolamine (DEA) were used as the immobilized liquid. Adsorption of CO2 from CO2‐N2 mixtures (3–28%, v/v) was performed in a constant volume‐variable pressure cell at 293 ± 2 K, and desorption of saturated sorbents was carried out at 373 ± 2 K. The textural properties of the porous supports have been seen to play an important role in amine loading into the pores and the mass transport of CO2 into/from the amine‐loaded pores. Among the porous supports, despite its lower surface area, pumice with a macroporous backbone helped immobilization of a large amount of amine and facilitated the CO2 sorption and desorption. Amine loading increased the CO2 capture efficiencies of activated carbon, pumice, and zeolite 4A as 13.4, 19.1, and 5.4 times for MEA and 6.2, 8.8, and 4.1 times for DEA, respectively. It was found that the CO2 release rates from MEA‐ and DEA‐impregnated 4A, AC, and P were 0.215, 0.475, and 0.556 mg CO2·g sorbent–1·min–1 and 0.242, 0.580, and 0.670 mg CO2·g sorbent–1·min–1, respectively, at 373 ± 2 K and 1 kPa. The CO2 sorption capacities of the MEA‐impregnated support materials from the cyclic operation were affected negatively more than the DEA‐impregnated ones and this effect increased from the microporous support material to the macroporous. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Various methods for sorbent preparation and situating amine groups on the porous supports are applied in the literature. Among them, impregnation of the supports with amines as well as grafting the amine groups on the supports are the main methods used for sorbent preparation [39,40]. The effects of various preparation techniques on the sorbent performance can be informative for sorbent optimization.…”

Section: Effect Of the Preparation Methodsmentioning

confidence: 99%

Data‐Driven Analysis of Amine‐Based Sorbents for CO₂ Removal from the Atmosphere

Bahmanpour,

Tegeler,

Colbert

et al. 2023

Chem Eng & Technol

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Available data on amine‐based sorbents used for the direct air capture (DAC) process were gathered and analyzed to identify the correlations between various aspects of these sorbents and the operating conditions they are used in. It is demonstrated that a moderately high temperature (∼ 50 °C) can help with higher CO2 capture capacity. The effect of sorbent preparation method on its activity and stability was studied. Also, the influence of amine groups and support choice on amine efficiency and CO2 capture capacity was discussed. The DAC process conditions proved to play a major role in determining the optimal sorbent. An outlook for characteristics to be sought for in future DAC sorbents for CO2 removal is proposed.

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A comparative study of CO₂capture by amine grafted vs amine impregnated zeolite 4A

Cited by 13 publications

References 22 publications

Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Adsorptive capture of CO₂ by amine‐impregnated activated carbon, pumice, and zeolite 4A

Data‐Driven Analysis of Amine‐Based Sorbents for CO₂ Removal from the Atmosphere

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A comparative study of CO2capture by amine grafted vs amine impregnated zeolite 4A

Cited by 13 publications

References 22 publications

Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Surface Basicity and Hydrophilic Character of Coal Ash-Derived Zeolite NaP1 Modified by Fatty Acids

Adsorptive capture of CO2 by amine‐impregnated activated carbon, pumice, and zeolite 4A

Data‐Driven Analysis of Amine‐Based Sorbents for CO2 Removal from the Atmosphere

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Product

Resources

About

A comparative study of CO₂capture by amine grafted vs amine impregnated zeolite 4A

Adsorptive capture of CO₂ by amine‐impregnated activated carbon, pumice, and zeolite 4A

Data‐Driven Analysis of Amine‐Based Sorbents for CO₂ Removal from the Atmosphere