Effect of vacuum regeneration of activated carbon on volatile organic compound adsorption

Pak, Seo Hyun; Jeon, Yong Woo

doi:10.4491/eer.2016.120

Cited by 12 publications

(8 citation statements)

References 16 publications

(18 reference statements)

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“…Therefore, the results demonstrated that ACF 2 outperformed ACF 1 and showed comparatively higher adsorption efficiency than ACF 3 . Similar results were derived in a previous study on cellulose-based ACFs modified by an amine functional group for the adsorption of acetaldehyde under 40% humidity conditions [32]. At start acetaldehyde adsorbed physically onto the active sites with oxygen and nitrogen of adsorbent that creates a bonding with acetaldehyde molecule quickly.…”

Section: Acetaldehyde Adsorption By the Selected Carbon-based Adsorbentssupporting

confidence: 88%

“…The results indicated that the performance of the composite adsorbents in terms of acetaldehyde adsorption from the air was poor under wet conditions. The adsorption efficiencies of the composite materials under wet conditions were lower than those under dry conditions, as mentioned in previous studies [32][33][34]…”

Section: Acetaldehyde Adsorption By Composite Adsorbents Under Dry Ansupporting

confidence: 66%

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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: 88%

Section: Acetaldehyde Adsorption By Composite Adsorbents Under Dry Ansupporting

confidence: 66%

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Park

Yaqub

Lee

et al. 2021

Environmental Engineering Research

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“…TVSA was expected to lower the desorption temperature, enhance the desorption rate, and shorten the desorption time of heavy VOCs. Pak et al [21] studied the adsorption and desorption of toluene using commercial activated carbons by TVSA. They reported a toluene desorption rate of 90% under the desorption conditions of 90 °C and 13 kPa.…”

Section: Introductionmentioning

confidence: 99%

Removal of Toluene by Adsorption/Desorption Using Ultra-stable Y Zeolite

Zhu

et al. 2019

Trans. Tianjin Univ.

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The adsorption performance of toluene on ultra-stable Y zeolite (USY) was studied via dynamic adsorption. The effects of bed temperature, initial concentration, and feed flow rate on adsorption were investigated. The Yoon-Nelson model was used to fit the toluene breakthrough curves. The length of mass transfer zone was calculated based on breakthrough curves. The Langmuir-Freundlich model fit the adsorption isotherms of toluene on USY, which indicated that the surface of USY was heterogeneous. The adsorption isosteric heat calculated from adsorption isotherms ranged from 54.3 to 69.8 kJ/mol, indicating physical adsorption. The combined technique of temperature swing adsorption with vacuum swing adsorption (TVSA) exhibited excellent desorption performance, which was attributed to the low desorption activation energy. Under optimized TVSA conditions, the desorption rate of toluene reached 90.6% within 10 min. The long-term cyclic utilization results indicated that the adsorption capacity of USY was stable.

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“…As shown in Table 1, studies related to removing VOCs have focused on various aspects, including performance improvement, modeling, performance testing, preparation of adsorbent, modification of adsorbent, and analysis of physicochemical properties. For example, activated carbon was used by Mofidi et al, 19 Dehdashti et al, 20 and Pak and Jeon 21 to discuss its adsorption capacities for styrene and toluene. To obtain more knowledge on the behaviors of the breakthrough curve, the Yoon and Nelson model was applied by Lemus et al 23 and Kalender and Akosman 24 to predict the breakthrough curves for removing chlorinated VOCs.…”

Section: Introductionmentioning

confidence: 99%

Effects of Molecular Properties on Adsorption of Six-Carbon VOCs by Activated Carbon in a Fixed Adsorber

Huang

Chung

2021

ACS Omega

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Gravimetric adsorption equipment with a microbalance was used to measure the adsorption of volatile organic compounds (VOCs) by activated carbon from 288 to 313 K. VOCs [n-hexane, cyclohexane, 1-hexene, 2-methylpentane, 3methylpentane, 2,2-dimethylbutane, acetone, butanone, and 2pentanone (Pentan-2-one)] were used as adsorbates in the adsorption system. Considering the geometric barrier, the critical diameter, and the boiling point, the adsorption capacities for sixcarbon (C 6 ) alkane isomers decrease in the order of n-hexane, 3methylpentane, and 2-methylpentane. The adsorbates, including nonpolar or weakly polar substances, and substances with smaller geometric obstacles and smaller molecular weights, were more easily adsorbed by the activated carbon. However, the dipole−dipole interactive force at higher pressures resulted in a higher adsorption capacity for 1-hexene than for n-hexane. Both polarity and molecular size should be considered in the analysis of the adsorption of ketones by activated carbon. The adsorption equilibrium constants decreased with increases in temperature because a higher temperature was unfavorable for adsorption. The results for the Toth adsorption isotherm model fitted by the adsorption data showed that the experimental data and the Toth adsorption isotherm model were consistent with each other, as evidenced by the low deviation between the experimental data and those from the fitted model.

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Effect of vacuum regeneration of activated carbon on volatile organic compound adsorption

Cited by 12 publications

References 16 publications

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Removal of Toluene by Adsorption/Desorption Using Ultra-stable Y Zeolite

Effects of Molecular Properties on Adsorption of Six-Carbon VOCs by Activated Carbon in a Fixed Adsorber

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