Shape-tailorable amine grafted silica aerogel microsphere for CO2 capture

Jiang, Xing; Ren, Jian; Kong, Yong; Zhao, Zhiyang; Shen, Xiaodong; Fan, Maohong

doi:10.1016/j.gce.2020.11.010

Cited by 11 publications

(14 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many types of aerogels for oil adsorption, including hydrophobic silica aerogels, − graphene aerogels, , and nanowire aerogels. , Among the kinds of aerogel sorbents, hydrophobic silica aerogels have desirable characteristics such as high porosities, high specific surface areas, and tailorable structure and chemical composition, which are desirable sorbents for water purification . However, the hydrophobic silica aerogel products are mostly irregular monoliths and powders, which are difficult to use in the real world no matter whether on a fixed bed or a fluidized bed . The aerogel powders will block the fixed bed and result in high backpressure and low permeability .…”

Section: Introductionmentioning

confidence: 99%

“…These monoliths and powders are not available in the fluidized bed owing to the irregular shape and size. Microspheres are a new product type of aerogels . The aerogel microsphere not only avoids blockage in the fixed bed but also can be used in the fluidized bed benefiting from their uniform size and regular shape, which offer good sorbent and adsorbate interaction. ,− …”

Section: Introductionmentioning

confidence: 99%

“…21 However, the hydrophobic silica aerogel products are mostly irregular monoliths and powders, which are difficult to use in the real world no matter whether on a fixed bed or a fluidized bed. 22 The aerogel powders will block the fixed bed and result in high backpressure and low permeability. 23 The massive monoliths lead to inefficient mass transfer owing to the short-circuiting effect.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

et al. 2022

Self Cite

View full text Add to dashboard Cite

The objective of this research was to develop new hydrophobic silica aerogel microspheres (HSAMs) with water glass and hexmethyldisilazane for oil adsorption. The effects of the hexmethyldisilazane concentration and drying method on the structure and organic liquid adsorption capacity were investigated. The hexmethyldisilazane concentration of the modification solution did not influence the microstructure and pore structure in a noteworthy manner, which depended more on the drying method. Vacuum drying led to more volume shrinkage of the silica gel microsphere (SGM) than supercritical CO 2 drying, thus resulting in a larger apparent density, lower pore volume, narrower pore size distribution, and more compact network. Owing to the large pore volume and pore size, the HSAMs synthesized via supercritical CO 2 drying had a larger organic liquid adsorption capacity. The adsorption capacities of the HSAMs with pore volumes of 4.04−6.44 cm 3 /g for colza oil, vacuum pump oil, and hexane are up to 18.3, 18.9, and 11.8 g/g, respectively, higher than for their state-of-the-art counterparts. The new sorbent preparation method is facile, cost-effective, safe, and ecofriendly, and the resulting HSAMs are exceptional in capacity, stability, and regenerability.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Microsphere is a new product type of aerogels, which was synthesized by the ball drop method, emulsion method, and jet cutting method, which are potential in water treatment [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. The microsphere avoids the blockage of the fixed adsorbent bed and offers good interaction between adsorbent and adsorbate [ 21 , 30 , 31 ]. Moreover, microspheres are easy to recycle from water for regeneration.…”

Section: Introductionmentioning

confidence: 99%

Auto-Continuous Synthesis of Robust and Hydrophobic Silica Aerogel Microspheres from Low-Cost Aqueous Sodium Silicate for Fast Dynamic Organics Removal

Sun

Zhao

Kong

et al. 2022

Gels

Self Cite

View full text Add to dashboard Cite

An efficient auto-continuous globing process was developed with a self-built apparatus to synthesize pure silica aerogel microspheres (PSAMs) using sodium silicate as a precursor and water as a solvent. A hydrophobic silica aerogel microsphere (HSAM) was obtained by methyl grafting. A reinforced silica aerogel microsphere (RSAM) was prepared by polymer cross-linking on the framework of the silica gel. The pH value of the reaction system and the temperature of the coagulating bath were critical to form perfect SAMs with a diameter of 3.0 ± 0.2 mm. The grafted methyl groups are thermally stable up to 400 °C. Polymer cross-linking increased the strength significantly, owing to the polymer coating on the framework of silica aerogel. The pore volumes of HSAM (6.44 cm3/g) and RSAM (3.17 cm3/g) were much higher than their state-of-the-art counterparts. Their specific surface areas were also at a high level. The HSAM and RSAM showed high organic sorption capacities, i.e., 17.9 g/g of pump oil, 11.8 g/g of hexane, and 22.2 mg/g of 10 mg/L methyl orange. The novel preparation method was facile, cost-effective, safe, and eco-friendly, and the resulting SAM sorbents were exceptional in capacity, dynamics, regenerability, and stability.

show abstract

“…To solve this problem, it is feasible to combine MOFs with appropriate substrate materials. Among many substrates, aerogels have excellent capture ability for CO 2 adsorption due to its advantages of high porosity and large specific surface area (Jiang et al 2020;Kong et al 2016a, b). Hence, MOFs have been combined with aerogels via direct mixing (Zhu et al 2016;Ma et al 2019a, b;Wang et al 2019Wang et al , 2020Wu et al 2020) or in-situ growth methods (Jiang et al 2018;Ren et al 2018;Zhu et al 2018;Valencia and Abdelhamid 2019;Yang et al 2019;Ma et al 2019a, b;Lei et al 2019;Cui et al 2020;Li et al 2020;Zong et al 2020;).…”

Section: Introductionmentioning

confidence: 99%

A novel combining strategy of cellulose aerogel and hierarchically porous metal organic frameworks (HP-MOFs) to improve the CO2 absorption performance

Zhao

Zhang

et al. 2022

Cellulose

View full text Add to dashboard Cite

show abstract

Shape-tailorable amine grafted silica aerogel microsphere for CO2 capture

Cited by 11 publications

References 36 publications

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

Development of Regular Hydrophobic Silica Aerogel Microspheres for Efficient Oil Adsorption

Auto-Continuous Synthesis of Robust and Hydrophobic Silica Aerogel Microspheres from Low-Cost Aqueous Sodium Silicate for Fast Dynamic Organics Removal

A novel combining strategy of cellulose aerogel and hierarchically porous metal organic frameworks (HP-MOFs) to improve the CO2 absorption performance

Contact Info

Product

Resources

About