Three-dimensional molecular basket sorbents for CO2 capture: Effects of pore structure of supports and loading level of polyethylenimine

Wang, Dongxiang; Wang, Xiaoxing; Ma, Xiaoliang; Fillerup, Eric; Song, Chunshan

doi:10.1016/j.cattod.2014.01.038

Cited by 69 publications

(53 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was suggested that as a greater volume of amine was loaded onto the carbon support, transport to the active sites was limited due to a blocking effect where the CO 2 had difficulty accessing the active sites. These findings support the conclusions from recent studies of PEI impregnated silica materials [25].…”

Section: Resultssupporting

confidence: 93%

“…There are a large number of promising reports in the literature on the potential of silicas loaded with a variety of amines [15e24]. A recent paper by Wang et al [25] compared different mesoporous silicas and emphasized the importance of pore structure for efficient utilization of amine on the support. However, there is a difference in terms of the loading of the amine onto the carbon support, as the cohesive properties of the silica and carbon surfaces will vary [2,26,27].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

Gibson

Gromov

Brandani

et al. 2015

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

a b s t r a c tThe effect of polyamine impregnation on the CO 2 adsorption properties of two different porous carbons, one microporous and one mesoporous, was studied systematically. The pore filling during impregnation with polyamines was shown to result in a fraction of the unfilled micropore volume being blocked for gas adsorption. Thermal gravimetric analysis was used to compare the CO 2 capacity at 0.1 bar with respect to the carbon support type, the amount of amine loading, and the type of amine. A 12 fold increase in the CO 2 capacity was observed when the impregnated activated carbon was compared to the raw starting material. A heat of adsorption for amine impregnated support of~90 kJ mol À1 was found, clearly indicating a chemisorption mechanism. The mesoporous material provided a more efficient support for the amine to interact with the CO 2 . The interaction between low molecular weight amines and CO 2 showed a more efficient utilization of the basic groups in comparison to high molecular weight species.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

Gibson

Gromov

Brandani

et al. 2015

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

show abstract

“…[9][10][11][12][13] The most common way to obtain amine functionalized solid sorbents is the impregnation of highly-ordered porous supports with low molecular amines or amino polymers. [14][15][16] A well-structured porosity and large pore volumes are among the most important characteristic of the supports making SBA-15 or MCM-41 often the material of choice. [17][18] High molecular weight amines that contain several primary, secondary or tertiary amine groups, i.e., tetraethylenpentamine (TEPA) or polyethyleneimine (PEI), are frequently employed in the impregnation.…”

Section: Introductionmentioning

confidence: 99%

Role of Amine Functionality for CO₂ Chemisorption on Silica

et al. 2016

View full text Add to dashboard Cite

The mechanism of CO2 adsorption on primary, secondary, and bibasic aminosilanes synthetically functionalized in porous SiO2 was qualitatively and quantitatively investigated by a combination of IR spectroscopy, thermogravimetry, and quantum mechanical modeling. The mode of CO2 adsorption depends particularly on the nature of the amine group and the spacing between the aminosilanes. Primary amines bonded CO2 preferentially through the formation of intermolecular ammonium carbamates, whereas CO2 was predominantly stabilized as carbamic acid, when interacting with secondary amines. Ammonium carbamate formation requires the transfer of the carbamic acid proton to a second primary amine group to form the ammonium ion and hence two (primary) amine groups are required to bind one CO2 molecule. The higher base strength of secondary amines enables the stabilization of carbamic acid, which is thereby hindered to interact further with nearby amine functions, because their association with Si-OH groups (either protonation or hydrogen bonding) does not allow further stabilization of carbamic acid as carbamate. Steric hindrance of the formation of intermolecular ammonium carbamates leads to higher uptake capacities for secondary amines functionalized in porous SiO2 at higher amine densities. In aminosilanes possessing a primary and a secondary amine group, the secondary amine group tends to be protonated by Si-OH groups and therefore does not substantially interact with CO2.

show abstract

“…Furthermore, various other materials were selected as supports such as activated carbon, carbon black, TUD-1, mesocellular siliceous foam (MCF) and MSU-J, etc. [28][29][30] , because the structure of the support material may also affect the CO 2 sorption properties of MBS. A sponge-like material TUD-1 was explored as the support to prepare MBS for CO 2 capture, and the results indicated that with 50 wt% PEI loading the highest CO 2 sorption capacity was obtained at 75 °C [29] .…”

Section: Introductionmentioning

confidence: 99%

“…Carbon based MBS was evaluated by using a thermogravimetric analyzer (TGA) and a fixed-bed flow sorption system [28] , which showed higher CO 2 sorption capacity due to the higher pore volume and larger pore size. Wang et al [30] used mesocellular siliceous foam (MCF), MSU-J and hexagonal mesoporous silica (HMS) as supports to prepare the threedimensional (3-D) MBS and studied the CO 2 sorption performance with TGA. It was observed that support materials exert positive effect on the CO 2 sorption capacity [30] .…”

Section: Introductionmentioning

confidence: 99%

CO2 capture over molecular basket sorbents: Effects of SiO2 supports and PEG additive

Zhang

Wang

Fujii

et al. 2017

Journal of Energy Chemistry

Self Cite

View full text Add to dashboard Cite

Three-dimensional molecular basket sorbents for CO2 capture: Effects of pore structure of supports and loading level of polyethylenimine

Cited by 69 publications

References 34 publications

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

Role of Amine Functionality for CO₂ Chemisorption on Silica

CO2 capture over molecular basket sorbents: Effects of SiO2 supports and PEG additive

Contact Info

Product

Resources

About

Three-dimensional molecular basket sorbents for CO2 capture: Effects of pore structure of supports and loading level of polyethylenimine

Cited by 69 publications

References 34 publications

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

Role of Amine Functionality for CO2 Chemisorption on Silica

CO2 capture over molecular basket sorbents: Effects of SiO2 supports and PEG additive

Contact Info

Product

Resources

About

Role of Amine Functionality for CO₂ Chemisorption on Silica