Adsorption of organic solvent vapors on hydrophobic Y‐type zeolite

Yun, Je Moon; Choi, Dae Ki; Kim, Sung Hyun

doi:10.1002/aic.690440612

Cited by 42 publications

(22 citation statements)

References 16 publications

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“…Time dependence of VOC adsorption capacity for GAC and SPME fiber The VOC adsorption capacity (Q, g VOC/g GAC) by an adsorbent increases as the concentration of VOC increase (C, ppm) (Yun et al, 1998;Erdem-Şenatalar et al, 2004;Cheng and Tsai, 2007). Additionally, Scahill et al (2004) used the Nelson-Harder correlation to determine the breakthrough time variations (t 1 and t 2 ) of the different inlet contaminant concentrations (C 1 and C 2 ):…”

Section: Methodsmentioning

confidence: 99%

Adsorption Characteristics of Granular Activated Carbon and SPME Indication of VOCs Breakthrough

Cheng

2008

Aerosol Air Qual. Res.

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Internal circulation cabinets equipped with granular activated carbon (GAC) to adsorb volatile organic compounds (VOCs) are extensively utilized to store bottles containing organic solvents in Taiwanese university, college, and hospital laboratories. This work evaluates the VOC adsorption capacity of GAC with various adsorption periods for 102-2652 ppm average inlet toluene concentrations at 27 o C and relative humidity (RH) 72 ± 3%. Additionally, solid-phase microextraction (SPME) technology was employed for indicating the renew moment of GAC, and avoiding a breakthrough of toluene from adsorbents. Experimental results demonstrate that toluene adsorption capacity is linearly expressed as the natural logarithm of adsorption time (ln(t)) at a constant temperature, and the equilibrium adsorption capacity (Q e , g toluene/g GAC) for average 102-2652 ppm gaseous toluene was accurately simulated using the proposed models. The SPME fiber installed in the outlet air stream for adsorbing toluene exhausted through GAC effectively indicated the breakthrough of VOCs. The GAC-SPME operational instructions to indicate the replace time of adsorbent in the internal circulation cabinets are concluded in this study.

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Section: Methodsmentioning

confidence: 99%

Adsorption Characteristics of Granular Activated Carbon and SPME Indication of VOCs Breakthrough

Cheng

2008

Aerosol Air Qual. Res.

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“…The VOC adsorption capacity (Q, g VOC/g MS) by molecular sieve increases with the concentration of VOC (C, ppm) (Erdem-Şenatalar et al, 2004;Yun, et al, 1998). Additionally, Scahill et al (2004) used the Nelson-Harder correlation to relate the breakthrough time variations (t 1 and t 2 ) of the different inlet contaminant concentration (C 1 and C 2 ):…”

Section: Fundamental Adsorption Theory Used In This Studymentioning

confidence: 99%

“…The Langmuir (Eq. (3)) isotherm models are used to fit the experimental equilibrium capacity data (Q e ) with various inlet concentrations (C) for adsorption of a single VOC at a constant temperature (Chou and Chiou, 1997;Yun, et al, 1998;Manjare and Ghoshal, 2006;Choudary, et al, 2002;Yoo, et al, 2005;O'Connor, 2006)). …”

Section: Fundamental Adsorption Theory Used In This Studymentioning

confidence: 99%

“…Experimentally, the adsorption capacities of chloroanilines on montmorillonite and kaolinite sieves depend on the hydrophilicity and lipophilicity of adsorbates; that is, the extent of adsorption on hydrophobic adsorbents increases with lipophilicity of adsorbates (Angioi, et al, 2005;Polati, et al, 2006). Additionally, the effects of moisture competition and high temperature desorption, which reduce the VOC adsorption capacities of adsorbents, have been extensively investigated (Keener and Zhou, 1990;Chou and Chiou, 1997;Lercher and Seshan, 1997;Yun, et al, 1998;Gawryś et al, 2001;Bilgiç and Aşkin, 2003;Manjare and Ghoshal, 2006). Generally, various solvents (such as ketones and alcohols) are gathered together in an internal circulation cabinet.…”

Section: Introductionmentioning

confidence: 99%

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Competition among Mixed Adsorbates Affecting the Adsorption of Gaseous Methyl Ethyl Ketone by Hydrophobic Molecular Sieve

Cheng

Tsai

2007

Aerosol Air Qual. Res.

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Internal circulation cabinets, equipped with adsorbents for emitted volatile organic compounds (VOCs), are extensively used to store organic solvents in Taiwanese university and hospital laboratories.This work evaluates how ketone and isopropanol (IPA) respectively influence the methyl ethyl ketone (MEK) adsorption capacity of a hydrophobic molecular sieve (MS) with a high Si/Al ratio of 1000, and concentration (C, ppm) are closely fitted using a Langmuir isotherm. Lower VOC concentration ratios less than 0.17 for mixing acetone and IPA respectively with MEK rarely affect the MEK adsorption by HiSiv 1000. However, the effect of competitive adsorption, which evidently reduces the adsorption capacity of MEK, is related to the higher mixture concentration ratio (> 0.80) of IPA to MEK. The experimental results show that the hydrophobicity characteristics of MEK, acetone and IPA were responsible for variation in adsorption capacity of hydrophobic molecular sieve. Working parameters of adsorbent materials in the internal circulation cabinet have been also provided for preventing breakthrough of VOC adsorption by the molecular sieve.

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“…These include desulfurization by microbial oxidation 6,7 , chemical oxidation 8,9 , ultraviolet-assisted oxidation 10 , biodesulfurization 11,12 , and adsorption [13][14][15][16][17] . In the adsorption process, sulfur compounds are removed via p-complexation [18][19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

Baeza¹,

Bassi²,

Villarroel³

et al. 2015

J. Chil. Chem. Soc.

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The adsorption of refractory sulfur molecule 4,6-Dimethyldibenzothiophene (4,6-DMDBT) over copper supported on zirconia, using different copper loadings (2-10% w/w) and a zirconia support with a high specific surface area, was studied. The results showed that the adsorption capacity of 4,6-DMDBT over Cu/ZrO 2 increased with copper content, reaching a maximum at around 8% Cu (0.58 mmol 4,6-DMDBT per gram of adsorbent). The results of characterizations with H 2 -TPR, Electrophoretic Migration, and XRD demonstrated that this Cu loading (8%) also corresponds to a maximum copper dispersion capacity for ZrO 2 support. Also, these absorbents showed considerable selectivity toward the adsorption of 4,6-DMDBT in a feed stream also containing Quinoline, decreasing adsorption capacity of 4,6-DMDBT by only 35%, despite both molecules being present in the same concentrations. The results of this work showed that desulfurization adsorption using Cu/ZrO 2 adsorbents can be an effective method to remove this type of refractory sulfur molecules, and an excellent alternative as a complementary process for deep desulfurization in the fuel industry.

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Adsorption of organic solvent vapors on hydrophobic Y‐type zeolite

Abstract: Experimental isotherms and prediction results for adsorption of benzene

Cited by 42 publications

References 16 publications

Adsorption Characteristics of Granular Activated Carbon and SPME Indication of VOCs Breakthrough

Adsorption Characteristics of Granular Activated Carbon and SPME Indication of VOCs Breakthrough

Competition among Mixed Adsorbates Affecting the Adsorption of Gaseous Methyl Ethyl Ketone by Hydrophobic Molecular Sieve

ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

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