Aerosol filtration enhancement using carbon nanostructures synthesized within a sintered nickel microfibrous matrix

Karwa, Amogh N.; Tatarchuk, Bruce J.

doi:10.1016/j.seppur.2011.11.026

Cited by 31 publications

(21 citation statements)

References 19 publications

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“…The flow rates of gases were controlled by Aalborg rotameters. Details of the thermal CVD setup have been described elsewhere [46]. The nickel foil sample was placed at the center of the reactor with its faces parallel to the direction of flow for equal exposure of gases to both faces of the foil.…”

Section: Methodmentioning

confidence: 99%

“…Figures 11(c1), 11(c2), and 11(c3) show that the CNF is uniformly deposited throughout the thickness of the SMM matrix [46]. These matrices with 3-dimensional deposition of CNF have shown enhancement in air filtration performance due to CNF synthesis [46]. Figure 12 shows the SEM images of surface deposition of CNF on the SMM matrix using synthesis conditions optimized for a high rate of reaction.…”

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

“…Figure 11 shows the SEM images of the 3-dimensional deposition of CNF within the SMM matrix using the synthesis conditions optimized in this study for a low rate of reaction. Figures 11(a) and 11(b) show the SEM images of SMM matrix before and after 11 min synthesis, respectively [46]. Figures 11(c1), 11(c2), and 11(c3) show that the CNF is uniformly deposited throughout the thickness of the SMM matrix [46].…”

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

“…Figures 11(a) and 11(b) show the SEM images of SMM matrix before and after 11 min synthesis, respectively [46]. Figures 11(c1), 11(c2), and 11(c3) show that the CNF is uniformly deposited throughout the thickness of the SMM matrix [46]. These matrices with 3-dimensional deposition of CNF have shown enhancement in air filtration performance due to CNF synthesis [46].…”

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

“…These two different structures were desired keeping in mind the potential engineering applications. Surface deposition of CNF on SMM can create a membrane-like structure with very small pores, whereas 3-dimensional deposition within the SMM matrix can provide benefits for other process applications such as liquid or air filtration [46]. Variations in the growth layer morphology of CNF were thought to be possible by varying the rate of reaction for CNF synthesis.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Karwa

Davis

Tatarchuk

2012

Journal of Nanotechnology

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This study focuses on the process of optimization for carbon nanofiber synthesis at the exterior and the interior of 3-dimensional sintered nickel microfibrous networks. Synthesis of carbon nanofibers (CNF) by catalytic decomposition of acetylene (ethyne) was conducted at atmospheric pressure and short reaction times (10 min). Two factors evaluated during the study were (a) CNF quality (observed by SEM and Raman spectroscopy) and (b) rate of reaction (gravimetrically measured carbon yield). Independent optimization variables included redox faceting pretreatment of nickel, synthesis temperature, and gas composition. Faceting resulted in an 8-fold increase in the carbon yield compared to an untreated substrate. Synthesis with varying levels of hydrogen maximized the carbon yield (9.31 mg C/cm 2 catalyst). The quality of CNF was enhanced via a reduction in amorphous carbon that resulted from the addition of 20% ammonia. Optimized growth conditions that led to high rates of CNF deposition preferentially deposited this carbon at the exterior layer of the nickel microfibrous networks (570 • C, 78% H 2 , 20% NH 3 , 2% C 2 H 2 , faceted Ni.). CNF growth within the 3-dimensional nickel networks was accomplished at the conditions selected to lower the gravimetric reaction rate (470 • C, 10% H 2 , 88% N 2 , 2% C 2 H 2 , nonfaceted Ni).

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Section: Methodmentioning

confidence: 99%

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

Section: Synthesis Of Cnf Within Nickel Sintered Metal Microfibrous (mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Karwa

Davis

Tatarchuk

2012

Journal of Nanotechnology

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Loading of fibrous filter media and newly designed filter configurations by salt particles: An experimental study

2016

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in Wiley Online Library (wileyonlinelibrary.com)Various fibrous filter media, including surface filter media, depth filter media, woven and nonwoven filter media, were tested and particle loading capacity was calculated using bench-scale setup via a new estimation approach which was proposed and experimentally verified with Novick-Kozeny model. Multi-element structured arrays (MESAs) developed by our research group were evaluated as well for particle loading capacity and filter lifetime on 24 00 3 24 00 full scale test rig (based on ASHRAE 52.2 Standard). Effects of varying filter media type, filter depth, pleat count and MESAs' element count on salt particle loading performance were experimentally investigated. The experimental studies showed that nonwoven activated carbon fiber filter media have allowed significantly higher salt particle loading capacity and longer useful lifetime compared to woven or nanofiber entrapped media. Furthermore, MESAs were able to significantly enhance loading capacity for salt particles and useful lifetime due to higher filtration area and lower filtration velocity.

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Self‐supported single‐wall carbon nanotube buckypaper membranes applied to air and water filtration

Berned‐Samatán

Jiménez

Rubio

et al. 2022

J of Chemical Tech & Biotech

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Background: This work addresses the use of self-supported single-wall carbon nanotube (SWCNT) buckypapers as filters or membranes to treat air or water streams to reduce the concentration of pollutants.Results: The fabrication of the buckypapers was carried out by a facile filtration method. The performance of the buckypaper as an air filter was tested with a NaCl aerosol obtaining a permeance of 241 m 3 m −2 h −1 bar −1 and a filtration efficiency of 99.9991%. The performance of the buckypaper as a water ultrafiltration (UF) membrane was studied separating ZIF-8 nanoparticles of 30, 50 and 120 nm in diameter, achieving a permeance of 124 L•m −2 h −1 bar −1 and a rejection of 99.99%.Conclusions: A simple technique is described for the rapid fabrication of self-supported SWCNT buckypaper membranes with a filtration method resulting in an excellent performance in both air and water filtration. In addition, because of the acquired control of ZIF-8 crystallization, particles of different sizes of this material were synthesized ad hoc to serve as a reference solute of UF separation.

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Aerosol filtration enhancement using carbon nanostructures synthesized within a sintered nickel microfibrous matrix

Cited by 31 publications

References 19 publications

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Loading of fibrous filter media and newly designed filter configurations by salt particles: An experimental study

Self‐supported single‐wall carbon nanotube buckypaper membranes applied to air and water filtration

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