Hydrophobic Zeolites as Adsorbents for Removal of Volatile Organic Compounds from Air

Chandak, M. V.; Yue, Lin

doi:10.1080/09593331908616752

Cited by 21 publications

(7 citation statements)

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“…Porous media such as activated carbon and zeolite possess large specific areas and have high adsorption capacity. They are frequently employed in traditional adsorption air purification systems to adsorb gases or odours [6][7][8][9]. Pollutant adsorption by activated carbon provides a cost-effective and feasible way to minimize the pollutant level.…”

Section: Introductionmentioning

confidence: 99%

Potential use of a combined ozone and zeolite system for gaseous toluene elimination

Chao

Kwong

Hui

2007

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Potential use of a combined ozone and zeolite system for gaseous toluene elimination

Chao

Kwong

Hui

2007

Journal of Hazardous Materials

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“…This driving force is defined as the difference between the surface concentration (pellet/gas interphase) and the average adsorbed-phase concentration (). Recent studies ( − ) have given good results for modeling dynamic adsorption with this model. Moreover, its simplicity allows significant savings in computation time.…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer in VOC Adsorption on Zeolite: Experimental and Theoretical Breakthrough Curves

Brosillon

Manero

Foussard

2001

Environ. Sci. Technol.

129

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From experimental results of adsorption of volatile organic compounds (VOCs) on zeolite, we propose simulations of the breakthrough curves based on the Linear Driving Force model. Experiments were run on fixed beds of hydrophobic commercial zeolites. Pollutants chosen are from several chemical classes with different polarities. A good agreement between experimental and numerical results is found when an adjustable value of the internal mass-transfer coefficient is used. A constant value of effective diffusivity is found independent of the nature and the amount of VOCs adsorbed. A relation linking intrapellet mass-transfer coefficient and equilibrium constant is proposed, including the average effective diffusivity, to make predictions of breakthrough curves for any kind of volatile organic pollutant in gaseous effluents.

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“…Zeolites are porous aluminosilicates with a high surface area and a high thermal stability and are used in applications such as catalysis [1,2], ion exchange [3,4] and in separation and purification processes [5,6]. Currently, the potential use of low-cost zeolites for carbon capture is to mitigate the anthropogenic release of carbon dioxide, e.g., combustion of fossil fuels is attracting a significant interest [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Methylcellulose-Directed Synthesis of Nanocrystalline Zeolite NaA with High CO2 Uptake

et al. 2014

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Zeolite NaA nanocrystals with a narrow particle size distribution were prepared by template-free hydrothermal synthesis in thermo-reversible methylcellulose gels. The effects of the amount of methylcellulose, crystallization time and hydrothermal treatment temperature on the crystallinity and particle size distribution of the zeolite NaA nanocrystals were investigated. We found that the thermogelation of methylcellulose in the alkaline Na2O-SiO2-Al2O3-H2O system played an important role in controlling the particle size. The synthesized zeolite nanocrystals are highly crystalline, as demonstrated by X-ray diffraction (XRD), and scanning electron microscopy (SEM) shows that the nanocrystals can also display a well-defined facetted morphology. Gas adsorption studies on the synthesized nanocrystalline zeolite NaA showed that nanocrystals with a size of 100 nm displayed a high CO2 uptake capacity (4.9 mmol/g at 293 K at 100 kPa) and a relatively rapid uptake rate compared to commercially available, micron-sized particles. Low-cost nanosized zeolite adsorbents with a high and rapid uptake are important for large scale gas separation processes, e.g., carbon capture from flue gas.

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Hydrophobic Zeolites as Adsorbents for Removal of Volatile Organic Compounds from Air

Cited by 21 publications

References 0 publications

Potential use of a combined ozone and zeolite system for gaseous toluene elimination

Potential use of a combined ozone and zeolite system for gaseous toluene elimination

Mass Transfer in VOC Adsorption on Zeolite: Experimental and Theoretical Breakthrough Curves

Methylcellulose-Directed Synthesis of Nanocrystalline Zeolite NaA with High CO2 Uptake

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