Tuning residual metal in partially etched carbide-derived carbons for enhanced acid gas adsorption

Moran, Colton M.; Marti, Robert M.; Joshi, Jayraj N.; Hayes, Sophia E.; Walton, Krista S.

doi:10.1016/j.carbon.2019.11.016

Cited by 7 publications

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major problem with EDLCs is that the energy densities are usually low. Activated carbon fibers, , heteroatom-doped biomass carbons, − carbide-derived carbons, , and graphene-like carbons − are common materials used to make EDLCs. Carbon nanotubes, aerogels, , and xerogels have also been used as active materials in EDLCs.…”

Section: Introductionmentioning

confidence: 99%

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

Brown

Agrawal

Wunch

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The development of electrically conductive and high surface area carbon is important for the improvement of supercapacitor energy densities. Yttrium hydroxide microspindles were prepared and shown to catalyze carbon growth. The carbon exhibited a high surface area of 932 m2/g and high conductivity of 2.2 × 105 S/m. The carbon/yttrium oxide interface was probed using XPS, Raman spectroscopy, infrared spectroscopy, and solid-state fluorescence. Supercapacitor cells were assembled using the yttrium-catalyzed carbon and EMI-TFSI ionic liquid as the electrolyte. The symmetric supercapacitor cell had a specific capacitance of 137.2 F/g, energy density of 57.4 Wh/kg, and power density of 1724.3 W/kg, at 1 A/g.

show abstract

Section: Introductionmentioning

confidence: 99%

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

Brown

Agrawal

Wunch

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Additionally, due to its corrosive and poisonous nature, hydrogen sulfide (H 2 S) is another gas that needs removal during the energy generation process. Therefore, significant efforts are being undertaken to develop technologies to curb CO 2 emissions and efficiently remove H 2 S. − In the past 20 years, the most promising and researched materials used for adsorption of harmful gases are zeolites, activated carbons, metal organic frameworks, and amine-functionalized mesoporous silica (silica gels, MCM-41, and SBA-15) due to their favorable porous properties. − …”

Section: Introductionmentioning

confidence: 99%

SBA-15 Functionalized with Amines in the Presence of Water: Applications to CO₂ Capture and Natural Gas Desulfurization

Anyanwu

Wang

Yang

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Conventional and pore expanded SBA-15 were amine-grafted under dry and wet conditions using N 1-(3-trimethoxysilylpropyl)diethylenetriamine. The effects of pore properties and gas hourly space velocity (GHSV) as well as the CO2 and H2S capture performance were investigated, and the results indicated that pore expanded SBA-15 displayed the best performance. Clumping and agglomeration of SBA-15 were observed for conventional SBA-15 under wet grafting conditions due to interparticle polymerization of amines after pores are completely filled. This phenomenon was not observed for pore expanded SBA-15, resulting in viable adsorbents with greater amounts of grafted amines. Pore expanded SBA-15 exhibited the highest CO2 capacity (3.27 mmol/g), which to the best of our knowledge is the largest for amine-grafted adsorbents. It also exhibited high amine efficiency (0.39 mol CO2/mol N) and faster uptake rates compared to conventional SBA-15 due to enhanced amine accessibility. For direct air capture, higher GHSV values result in lower breakthrough CO2 capacities and the breakthrough CO2 capacity of wet grafted pore expanded SBA-15 is more dependent on GHSV than that of dry grafted pore expanded SBA-15 due to diffusion resistance. Last, conventional SBA-15 displayed a marginally lower H2S adsorption capacity compared to pore expanded SBA-15, suggesting that diffusion resistance does not play a significance role during H2S adsorption. These results suggest the consideration of wet grafted pore expanded mesoporous siliceous supports for the design of promising adsorbents for the capture of CO2 and the removal of H2S from natural gas.

show abstract

“…One such alternative is gas adsorption using solid adsorbents such as carbons, − zeolites, − metal–organic frameworks, − nitrogen-functionalized porous polymers, − and amine-functionalized silicas. − The combination of selective capture and catalytic conversion is also an alternative route for CO 2 and H 2 S removal. , Among all the adsorbents, amine grafted silicas are some of the most promising because of their high capacities, high CO 2 (and H 2 S) selectivities, high adsorption rates, ease in regeneration and low moisture sensitivities . Ordered mesoporous silicas (Mobil Composition of Matter- n or MCM- n , Santa Barbara Amorphous- n or SBA- n , , and hexagonal mesoporous silica or HMS) are of great interest due to their adjustable pore sizes, large surface areas, and, most notably, the hydroxyl groups or silanols that dominate the surface.…”

Section: Introductionmentioning

confidence: 99%

Template Removal from SBA-15 by Ionic Liquid for Amine Grafting: Applications to CO₂ Capture and Natural Gas Desulfurization

Wang

Yang

2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

A new ionic liquid treatment method has been developed for removing the organic template from mesoporous silica SBA-15. Compared with conventional template removal by air calcination, the novel ionic liquid treatment method efficiently removed the organic template at a low temperature and preserved the surface silanol groups. The significantly increased silanol density led to higher amine loadings on amine grafted SBA-15. Consequently, the ionic liquid treated sample showed 63% more CO 2 capacity at conditions relevant to CO 2 capture from flue gas. Moreover, the ionic liquid treated sample exhibited significantly higher capacities for H 2 S capture from natural gas as well as CO 2 adsorption capacities for direct air capture which were nearly 3 times higher than the conventionally treated sample. The adsorbent stability, the isosteric heats of adsorption, and the effect of moisture were also investigated for the ionic liquid treated sample. The mechanism of template removal by ionic liquid is discussed, and the feasibility of recovery/reuse of the ionic liquid and the template is shown.

show abstract

Tuning residual metal in partially etched carbide-derived carbons for enhanced acid gas adsorption

Cited by 7 publications

References 66 publications

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

SBA-15 Functionalized with Amines in the Presence of Water: Applications to CO₂ Capture and Natural Gas Desulfurization

Template Removal from SBA-15 by Ionic Liquid for Amine Grafting: Applications to CO₂ Capture and Natural Gas Desulfurization

Contact Info

Product

Resources

About

Tuning residual metal in partially etched carbide-derived carbons for enhanced acid gas adsorption

Cited by 7 publications

References 66 publications

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

SBA-15 Functionalized with Amines in the Presence of Water: Applications to CO2 Capture and Natural Gas Desulfurization

Template Removal from SBA-15 by Ionic Liquid for Amine Grafting: Applications to CO2 Capture and Natural Gas Desulfurization

Contact Info

Product

Resources

About

SBA-15 Functionalized with Amines in the Presence of Water: Applications to CO₂ Capture and Natural Gas Desulfurization

Template Removal from SBA-15 by Ionic Liquid for Amine Grafting: Applications to CO₂ Capture and Natural Gas Desulfurization