Behaviors of Cellulose-Based Activated Carbon Fiber for Acetaldehyde Adsorption at Low Concentration

Ryu, Dong Yeon; Nakabayashi, Koji; Shimohara, Takaaki; Morio, Ueda; Mochida, Isao; Miyawaki, Jin; Jeon, Yukwon; Park, Joo Il; Yoon, Seong Ho

doi:10.3390/app10010025

Cited by 9 publications

(7 citation statements)

References 35 publications

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“…Therefore, AC 4 , which is an impregnated AC, can be considered a promising adsorbent for the adsorption of acetaldehyde from the air. These results are supported by those of a previous study in which the adsorption capacity of impregnated AC using various impregnants was explored based on their steric structure and acidity for acetaldehyde adsorption [29]. Therefore, the highest adsorption of acetaldehyde by AC might be achieved because of lesser benzene ring presence in the impregnated amine that hinders the condensation of acetaldehyde.…”

Section: Acetaldehyde Adsorption By the Selected Carbon-based Adsorbentssupporting

confidence: 85%

“…The adsorption capacity of AC for acetaldehyde removal has been reported to not be promising, as discussed in the literature [24, 4 28]. It was reported that the acetaldehyde adsorption capacity of impregnants AC is affected by the steric structure and acidity [29]. A recent study showed that cellulose-based AC fibers (CACFs) can be used as a potential adsorbent for the adsorption of acetaldehyde from the air [30].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Park

Yaqub

Lee

et al. 2021

Environmental Engineering Research

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The adsorption of acetaldehyde from air using various activated carbon and carbon fibers was investigated in this study. These adsorbents included activated carbon (AC), carbon fibers (CFs), activated carbon fibers (ACFs), and metal-coated carbon fibers (MCCFs) supplied by different manufacturers. AC was categorized as AC 1 , AC 2 , AC 3 , and AC 4 , CFs were denoted as ACF 1 , while ACFs and MCCFs were denoted as ACF 2 and ACF 3 , respectively. Five composite materials were prepared using the AC and ACFs in different ratios, and experiments were conducted to assess their acetaldehyde adsorption efficiency under dry and wet conditions. The results showed that the acetaldehyde adsorption efficiency of an impregnated AC 4 was higher (95.9%) than that of both non-impregnated AC 1 and AC 3 and an impregnated AC 2 after 1 min of operation. ACF 2 showed a higher acetaldehyde adsorption efficiency (50.9%) as compared to ACF 1 and ACF 3 because of its larger surface area and selective absorption capability after 1 min of operation. A composite material consisting of 6.3 g of AC 4 and 1 g of ACF 2 showed the highest adsorption efficiency of 97.9% under dry conditions. However, this adsorption efficiency significantly decreased under wet conditions.

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Section: Acetaldehyde Adsorption By the Selected Carbon-based Adsorbentssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Park

Yaqub

Lee

et al. 2021

Environmental Engineering Research

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“…These aminated ACs showed a greater improvement in the adsorption performance in various adsorption processes. The mechanism of FA is described in our previous report [63]. Considering urea as an amine source, the carbonyl group of FA adsorbs onto the active sites (micro-walls) of AC (HCHO( g ) → HCHO( ad.…”

Section: Approaches To Chemical Modifications Of the Ac Surfacementioning

confidence: 91%

A Brief Review of Formaldehyde Removal through Activated Carbon Adsorption

Kang

Jang

et al. 2022

Applied Sciences

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Formaldehyde is a highly toxic indoor pollutant that can adversely impact human health. Various technologies have been intensively evaluated to remove formaldehyde from an indoor atmospheres. Activated carbon (AC) has been used to adsorb formaldehyde from the indoor atmosphere, which has been commercially viable owing to its low operational costs. AC has a high adsorption affinity due to its high surface area. In addition, applications of AC may be diversified by the surface modification. Among the different surface modifications for AC, amination treatments of AC have been reported and evaluated. Specifically, the amine functional groups of the amine-treated AC have been found to play an important role in the adsorption of formaldehyde. Surface modifications of AC by impregnating and/or grafting the amine functional groups onto the AC surface have been reported in the literature. The impregnation of the amine-containing species on AC is mainly achieved by physical interaction or H-bond of the amines to the AC surface. Meanwhile, the grafting of the amine functional groups is mainly conducted through chemical reactions occurring between the amines and the AC surface. Herein, the carboxyl group, as a representative functional group for grafting on the surface of AC, plays a key role in the amination reactions. A qualitative comparison of amination chemicals for the surface modification of AC has also been discussed. Thermodynamics and kinetics for adsorption of formaldehyde on AC are firstly reviewed in this paper, and then the major factors affecting the adsorptive removal of formaldehyde over AC are highlighted and discussed in terms of humidity and temperature. In addition, new strategies for amination, as well as the physical modification option for AC application, are proposed and discussed in terms of safety and processability.

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“…In addition, no change in the structure of BAC is observed, as there is almost no change in the -CH2 groups. Ryu et al [34] reported that the amine functional groups on activated carbon lead to a higher CH 3 CHO adsorption efficiency, and thus, the amine groups should increase CH 3 CHO adsorption.…”

Section: Chemical Characterizationmentioning

confidence: 99%

Effective Removal of Acetaldehyde Using Piperazine/Nitric Acid Co-Impregnated Bead-Type Activated Carbon

et al. 2023

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Acetaldehyde (CH3CHO) in the atmosphere is associated with adverse health effects. Among the various options for use in removing CH3CHO, adsorption is often employed because of its convenient application and economical processes, particularly when using activated carbon. In previous studies, the surface of activated carbon has been modified with amines to remove CH3CHO from the atmosphere via adsorption. However, these materials are toxic and can have harmful effects on humans when the modified activated carbon is used in air-purifier filters. Therefore, in this study, a customized bead-type activated carbon (BAC) with surface modification options via amination was evaluated for removing CH3CHO. Various amounts of non-toxic piperazine or piperazine/nitric acid were used in amination. Chemical and physical analyses of the surface-modified BAC samples were performed using Brunauer–Emmett–Teller measurements, elemental analyses, and Fourier transform infrared and X-ray photoelectron spectroscopy. The chemical structures on the surfaces of the modified BACs were analyzed in detail using X-ray absorption spectroscopy. The amine and carboxylic acid groups on the surfaces of the modified BACs are critical in CH3CHO adsorption. Notably, piperazine amination decreased the pore size and volume of the modified BAC, but piperazine/nitric acid impregnation maintained the pore size and volume of the modified BAC. In terms of CH3CHO adsorption, piperazine/nitric acid impregnation resulted in a superior performance, with greater chemical adsorption. The linkages between the amine and carboxylic acid groups may function differently in piperazine amination and piperazine/nitric acid treatment.

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Behaviors of Cellulose-Based Activated Carbon Fiber for Acetaldehyde Adsorption at Low Concentration

Cited by 9 publications

References 35 publications

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

A Brief Review of Formaldehyde Removal through Activated Carbon Adsorption

Effective Removal of Acetaldehyde Using Piperazine/Nitric Acid Co-Impregnated Bead-Type Activated Carbon

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