Amine-modified mesocellular silica foams for CO2 capture

Yan, Xinlong; Zhang, Lei; Zhang, Ying; Qiao, Ke; Zhang, Yan; Komarneni, Sridhar

doi:10.1016/j.cej.2011.01.066

Cited by 167 publications

(117 citation statements)

References 36 publications

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“…The adsorption capacity of MSU-J-TEPA-n in pure CO 2 increased with the increasing of the TEPA loaded amount until it reached a maximum of 164.3 mg/g with 50 wt% of TEPA at 25°C and 0.1 MPa, after which it decreased, this result was in agreement with the research of Xu et al [29] and Yan [30], at amine loading of 50 wt% in the silicon support, the highest CO 2 adsorption capacity was obtained. The MSU-J support alone showed a CO 2 adsorption capacity of 43.2 mg/g, the low adsorption capacity may ascribe to the weak interaction between CO 2 and Si-OH [29].…”

Section: Effects Of Amount Of Tepa and Adsorption Temperaturesupporting

confidence: 94%

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CO2 capture of amino functionalized three-dimensional worm-hole mesostructured MSU-J silica

Wang

Dan

et al. 2014

J Porous Mater

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Tetraethylenepentamine (TEPA) was employed to functionalize the large-pore mesoporous silica (denoted MSU-J) with 3D worm-hole framework structures which was prepared through a supramolecular hydrogen-bonding assembly pathway from low-cost H 2 NCH(CH 3 )CH 2 [OCH 2 CH(CH 3 )] 33 NH 2 (D2000) as structure-directing porogens and tetraethylorthosilioate as the silica source for capturing CO 2 . The resultant adsorbents were characterized by FT-IR, Transmission electron microscopy (TEM), N 2 adsorption/desorption and thermogravimetric analysis. Textural properties, elemental analysis and TEM measurement of the samples showed a severe pore filling of MSU-J as TEPA loading was increased to 70 wt%. CO 2 adsorption isotherms measured at different temperatures revealed the optimal adsorption temperature is 25°C. The adsorption capacity of MSU-J with different TEPA loading contents was calculated. As a result, 50 wt% of TEPA supported on as-synthesized MSU-J achieved the highest capacity with the value of 164.3 mg/g under the conditions of 99.99 % CO 2 at 25°C and 0.1 MPa. Repeated adsorption/desorption cycles revealed that amine-impregnated materials was very efficient for less apparent decrease in CO 2 adsorption capacity even after 6 adsorption-regeneration cycles.

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Section: Effects Of Amount Of Tepa and Adsorption Temperaturesupporting

confidence: 94%

“…Then the slurry was dried at 70°C for 16 h,followed by elimination of ethanol on a water-bath at 80°C. The as-prepared adsorbent was denoted as MSU-J-TEPA-X, where X represents the amine loading (20,30,50 and 70 %)as weight percentage in the sample.…”

Section: Synthesis Of the Functionalized Msu-jmentioning

confidence: 99%

CO2 capture of amino functionalized three-dimensional worm-hole mesostructured MSU-J silica

Wang

Dan

et al. 2014

J Porous Mater

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“…As the N content of PEI423 is $23.3 mmol N g À1 , the stoichiometric ratio of CO 2 to N (CO 2 /N) for F-PEI423%80 is 0.31, comparable to that of sorbents based on the textural mesoporous silica, 11 mesocellular foams 21 and mesocapsules, 27 but higher than that of MCM-41-PEI423%75 (CO 2 /N ¼ 0.22) and SBA-15-PEI423%75 (CO 2 /N ¼ 0.23). In recent contributions Sayari et al reported that coating a layer of long-chain hydrophobic alkyl groups on mesoporous silica can greatly enhance the amine efficiency, up to CO 2 /N z 0.36.…”

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confidence: 90%

Efficient CO2 sorbents based on silica foam with ultra-large mesopores

Choi

et al. 2012

Energy Environ. Sci.

151

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A series of high-capacity, amine impregnated sorbents based on a cost-effective silica foam with ultralarge mesopores is reported. The sorbents exhibit fast CO 2 capture kinetics, high adsorption capacity (of up to 5.8 mmol g À1 under 1 atm of dry CO 2 ), as well as good stability over multiple adsorptiondesorption cycles. A simple theoretical analysis is provided relating the support structure to sorbent performance.

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“…In the past decade, development of processes based on solid adsorbents has been considered as alternative separation technologies for postcombustion CO 2 capture. Porous solids such as zeolites [2][3][4][5], activated carbons [6][7][8][9], hydrotalcites [10][11][12][13][14], metal-organic frameworks [15][16][17] and mesoporous silicas [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] are good candidates for capturing CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Carbon dioxide adsorption using amine-functionalized mesocellular siliceous foams

Liu

Chen

et al. 2014

J Mater Sci

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Mesocellular siliceous foams (MCFs) with and without remaining template were prepared and modified by polyethylenimine (PEI) or mixed amines [Diethylenetriamine and PEI or 3-aminopropyltrimethoxysilane (APTMS) and PEI]. These samples were evaluated for their adsorption capacities for CO 2 at different temperatures. With the increase of PEI loading, the optimal adsorption temperature shifts to higher temperature for samples prepared in our study. The remaining template in MCF materials plays an important role in promoting CO 2 adsorption capacity, which could be 3.24 mmol/g when the amount of PEI loading is 70 % at 85°C. Meanwhile, the remaining template contributes greatly to the dispersion of PEI, resulting in higher adsorption capacity at low temperature. The effect of the amount of remaining template was studied, and it was found that CO 2 adsorption capacity decreases with increasing template. The CO 2 adsorption capacities for mixed-amine-modified MCFs are higher than those of the samples modified by PEI only, which was ascribed to the better dispersion of PEI. MCF modified with the mixing of APTMS and PEI exhibited highest adsorption capacity of 2.67 mmol/g at 50°C. These findings reveal that pore structure, PEI loading, PEI dispersion, and remaining template work together to influence the CO 2 adsorption performance.

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Amine-modified mesocellular silica foams for CO2 capture

Cited by 167 publications

References 36 publications

CO2 capture of amino functionalized three-dimensional worm-hole mesostructured MSU-J silica

CO2 capture of amino functionalized three-dimensional worm-hole mesostructured MSU-J silica

Efficient CO2 sorbents based on silica foam with ultra-large mesopores

Carbon dioxide adsorption using amine-functionalized mesocellular siliceous foams

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