Adsorption of a four-component gas mixture on zeolite NaX

Vashchenko, L. A.; Katal'nikova, V. V.

doi:10.1007/bf01431299

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…For a long time now research has been conducted into the adsorption and separation of gas mixtures for preparative purposes [1][2][3][4][5][6][7]. Several modifications have been performed to improve the efficiency of VOC degradation.…”

Section: Introductionmentioning

confidence: 99%

Catalyzed Reactions on Mineral Plaster Materials Used for Indoor Air Purification

Gunschera¹,

Markewitz²,

Koberski³

et al. 2013

CLEAN Soil Air Water

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Zeolites have been used for a long time for purification and catalytical purposes. Recently, first products appeared on the market using zeolites also for improving the indoor air quality so far volatile organic compounds (VOC) are concerned. However, porous compounds like zeolites can be found also in plaster material. Therefore, it was manifest to evaluate the capability of plaster with regard to air cleaning. In this article, the contribution of plaster compounds toward adsorption and catalytical decomposition of VOCs is evaluated using a-pinene, chlorobenzene, 2-ethoxyethylacetate, and pentanal as target substances under standard conditions (238C, 50% r.H.). These compounds were chosen because of their VOC typical physicochemical properties like molecular dimensions, density, boiling point, vapor pressure, and octanol-water distribution coefficient (logk ow ). Hydrated lime and metakaolin were found out to have good adsorption properties under these circumstances. Also natural zeolites showed good results especially on pentanal. By investigations in environmental chambers the reduction potential of test plasters on chlorobenzene and 2-ethoxyethylacetate concentrations could be shown. Application of coatings had no or only temporary influence on the performance of the plaster. Additional tests in small chambers demonstrated the possibility to improve the properties of plasters with help of FAU-or MFI-type zeolites but the experiments also showed that a-pinene and pentanal undergo chemical reactions. Further effort should be made on investigations also toward other compounds, especially more volatile ones like formaldehyde. Also additional building materials like insulation material or boards should be taken into account.

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Section: Introductionmentioning

confidence: 99%

Catalyzed Reactions on Mineral Plaster Materials Used for Indoor Air Purification

Gunschera¹,

Markewitz²,

Koberski³

et al. 2013

CLEAN Soil Air Water

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Accurate Fit and Thermochemical Analysis of the Adsorption Isotherms of Methane in Zeolite 13X

Llano‐Restrepo

2010

Adsorption Science & Technology

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ABSTRACT:The recovery of methane from landfill gases and coal mines has become of the utmost importance because methane has a global-climate warming potential much higher than that of carbon dioxide. Zeolite 13X is widely used for the separation of methane and carbon dioxide from such sources. Accurate fits of the adsorption isotherms of methane in zeolite 13X are required for the rigorous simulation of that separation. In this work, a generalized statistical thermodynamic adsorption (GSTA) model has been used to obtain a very accurate correlation of a published set of adsorption isotherms of methane in zeolite 13X that were measured from 120 K to 273 K over the pressure range 0.07 Pa to 12.2 MPa. In contrast, none of five traditional adsorption models was capable of fitting these isotherms. A thermochemical interpretation of the correlation is provided and predictions for the isosteric heat of adsorption are made, which turn out to be in excellent agreement with the available experimental data.

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Adsorption of a four-component gas mixture on zeolite NaX

Cited by 2 publications

References 3 publications

Catalyzed Reactions on Mineral Plaster Materials Used for Indoor Air Purification

Catalyzed Reactions on Mineral Plaster Materials Used for Indoor Air Purification

Accurate Fit and Thermochemical Analysis of the Adsorption Isotherms of Methane in Zeolite 13X

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