Modified carbon nanotubes/tetraethylenepentamine for CO2 capture

Irani, Maryam; Jacobson, Andrew T.; Gasem, Khaled A. M.; Fan, Maohong

doi:10.1016/j.fuel.2017.05.087

Cited by 91 publications

(44 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…XRD patterns of CNTs and AT-CNTs were shown in Figure 2 f. Obviously, the crystalline structure of CNTs did not change after acid treatment. They had the same diffraction peaks at 25° and 42°, corresponding to (002) and (100) orientations, respectively [ 34 ], implying that its d -spacing resembles the one of pristine graphite [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotubes Reinforced Maleic Anhydride-Modified Xylan-g-Poly(N-isopropylacrylamide) Hydrogel with Multifunctional Properties

et al. 2018

View full text Add to dashboard Cite

Introducing multifunctional groups and inorganic material imparts xylan-based hydrogels with excellent properties, such as responsiveness to pH, temperature, light, and external magnetic field. In this work, a composite hydrogel was synthesized by introducing acid treated carbon nanotubes (AT-CNTs) into the maleic anhydride modified xylan grafted with poly(N-isopropylacrylamide) (MAX-g-PNIPAM) hydrogels network. It was found that the addition of AT-CNTs affected the MAX-g-PNIPAM hydrogel structure, the swelling ratio and mechanical properties, and imparted the hydrogel with new properties of electrical conductivity and near infrared region (NIR) photothermal conversion. AT-CNTs could reinforce the mechanical properties of MAX-g-PNIPAM hydrogels, being up to 83 kPa for the compressive strength when the amount was 11 wt %, which was eight times than that of PNIPAM hydrogel and four times than that of MAX-g-PNIPAM hydrogel. The electroconductibility was enhanced by the increase of AT-CNTs amounts. Meanwhile, the composite hydrogel also exhibited multiple shape memory and NIR photothermal conversion properties, and water temperature was increased from 26 °C to 56 °C within 8 min under the NIR irradiation. Thus, the AT-CNTs reinforced MAX-g-PNIPAM hydrogel possessed promising multifunctional properties, which offered many potential applications in the fields of biosensors, thermal-arrest technology, and drug-controlled release.

show abstract

Section: Resultsmentioning

confidence: 99%

Carbon Nanotubes Reinforced Maleic Anhydride-Modified Xylan-g-Poly(N-isopropylacrylamide) Hydrogel with Multifunctional Properties

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Carbon-based materials are the most prevalent sorbents used in various studies to investigate the CO 2 adsorption capability. Irani et al studied modified carbon nanotubes/tetraethylenepentaamine for CO 2 adsorption and the results showed the sorption capacity of 5 mmol/g-sorbent at 60 • C (Irani et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Polyethyleneimine (PEI) Functionalized Metal Oxide Nanoparticles Recovered From the Catalytic Converters of Spent Automotive Exhaust Systems and Application for CO2 Adsorption

2020

View full text Add to dashboard Cite

A novel CO 2 sorbent was prepared from the catalytic converters of spent automotive exhaust system by modifying with polyethyleneimine (PEI) through wet impregnation method. The prepared sorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Brauer-Emmett-teller (BET) analysis before and after functionalization. Different PEI loadings were employed to study the adsorption performance of as-prepared sorbent. The characterization results showed no significant change in the structure, but the surface area was decreased after modification with amine groups. The adsorption was remarkably improved by increasing the PEI loading. The optimal PEI loading on the as-prepared sorbent was 60 wt.%. At optimal PEI loading, the CO 2 adsorption reached to 101.3 mg (g sorbent) −1 at 70 • C and partial pressure of 100 kPa. Further PEI loading had a negative effect on the adsorption. The CO 2 adsorption capacity increased to 125.2 mg (g sorbent) −1 in the presence of 1 vol.% of the H 2 O moisture. Results confirmed the high performance of novel sorbent compared to other porous sorbents such as carbon-based materials. Adsorption/desorption cycles revealed that the PEI-impregnated sorbent can be satisfactorily regenerated after CO 2 adsorption process.

show abstract

“…The functionalization of CNTs can be performed with a wide range of functional groups including oxygen-and nitrogen-containing groups. Incorporation of nitrogen-containing groups enhances the basicity of CNTs and thus can improve capacity and selectivity of carbonaceous materials in adsorption of acidic gases such as CO 2 and SO 2 (Fatemi et al, 2011;Gui et al, 2013;Khalili et al, 2013;Irani et al, 2017;Zhou et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Functionalization of Carbon Nanotubes on Gas Separation

Babaei

Anbia

Kazemipour

2019

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

In order to improve the adsorption capacity and selectivity of CO 2 /CH 4 and CO 2 /N 2 , we have functionalized multi-walled carbon nanotubes (MWCNT) with 3-aminopropyltriethoxysilane (APTES). The functionalized MWCNT was characterized by Fourier transform infrared (FT-IR), energy dispersive X-ray spectroscopy (EDX) and BET analysis. CO 2 , CH 4 and N 2 adsorption at two different temperatures and P < 5 bar on the functionalized MWCNTs was investigated by the volumetric method. The selectivity of the functionalized MWCNTs for CO 2 /CH 4 and CO 2 /N 2 was studied and compared with MWCNTs. The functionalized MWCNTs show higher adsorption capacity of CO 2 and selectivity of CO 2 /CH 4 and CO 2 /N 2 in comparison with the MWCNTs at different pressures. The highest CO 2 /CH 4 and CO 2 /N 2 selectivities for the functionalized MWCNTs were 6.78 and 26.14, respectively, at a pressure of 0.2 bar and at 298 K. Two of the most common adsorption models, the Langmuir and Sips isotherms, were used to correlate the experimental data of CO 2 and CH 4 adsorption on the adsorbents. The results confirm that the functionalized MWCNTs are promising materials for the separation and purification of gases.

show abstract

Modified carbon nanotubes/tetraethylenepentamine for CO2 capture

Cited by 91 publications

References 28 publications

Carbon Nanotubes Reinforced Maleic Anhydride-Modified Xylan-g-Poly(N-isopropylacrylamide) Hydrogel with Multifunctional Properties

Carbon Nanotubes Reinforced Maleic Anhydride-Modified Xylan-g-Poly(N-isopropylacrylamide) Hydrogel with Multifunctional Properties

Polyethyleneimine (PEI) Functionalized Metal Oxide Nanoparticles Recovered From the Catalytic Converters of Spent Automotive Exhaust Systems and Application for CO2 Adsorption

Study of the Effect of Functionalization of Carbon Nanotubes on Gas Separation

Contact Info

Product

Resources

About