Post-synthesis treatment for improving zeolite coating stability

Atakan, Aylin; Atalay-Oral, Çiğdem; Tatlıer, Melkon; Erciyes, Tuncer; Erdem-Şenatalar, Ayşe

doi:10.1016/j.micromeso.2012.03.002

Cited by 16 publications

(11 citation statements)

References 23 publications

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“…It is possible that the dissolution of glass, interfering with zeolite synthesis as mentioned before, may also affect the stabilities of the zeolite coatings in different amounts at different stages of synthesis. Covering the zeolite with thin polyacrylic acid layers after synthesis was observed to favor stability to a great extent, similar to the coatings prepared on stainless steel (Atakan et al, 2012). By using this post-synthesis treatment, the mass loss in the coating was almost avoided, reducing it to about 2-3% of the original sample mass.…”

Section: Resultssupporting

confidence: 53%

“…It was previously observed that the additional thin polyacrylic acid layers covering zeolite coatings did not lead to any reduction in the adsorption/desorption capacities of the samples (Atakan et al, 2012). On the other hand, slightly adverse impacts were observed on the adsorption kinetics, especially after relatively high normalized loadings for the zeolitepolymer composite samples (Atakan et al, 2013).…”

Section: Resultsmentioning

confidence: 87%

“…This was shown previously to improve the stabilities of zeolite on stainless steel substrates (Atakan et al, 2012). For this purpose, a solution containing 4% (by weight) of polymer was prepared from commercial polyacrylic acid (Aldrich, MW=450000 g/mol).…”

Section: Methodsmentioning

confidence: 99%

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Preparation of Zeolite X Coatings on Soda-Lime Type Glass Plates

Tatlıer

Atalay-Oral

2017

Braz. J. Chem. Eng.

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-The dissolution of glass in highly alkaline reaction mixtures and the impact of this phenomenon on zeolite coating formation were investigated. Coating samples were prepared and characterized by X-ray diffraction (XRD), field emission gun scanning electron microscopy (FEGSEM) and thermogravimetry (TG). It was demonstrated that zeolite X coatings might be prepared on soda-lime glass. Glass dissolved to some degree, up to 2% of its original mass, in the reaction mixtures for the conditions investigated. This dissolution affected the zeolite synthesis taking place on the glass surface, resulting in phases different from those obtained on inert metal surfaces in some cases, especially for the use of reaction mixtures with relatively high Si/Al ratios. The percentage of dissolution of glass plates increased with their decreasing thickness, indicating a surface phenomenon for the dissolution. The stabilities of the coatings, which varied with the synthesis conditions, benefited from the addition of extra thin layers of polyacrylic acid.

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 87%

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Preparation of Zeolite X Coatings on Soda-Lime Type Glass Plates

Tatlıer

Atalay-Oral

2017

Braz. J. Chem. Eng.

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“…An additional treatment was applied to S3 as the temperature of the water bath was raised from 25 C to 50 C and kept there for 2 h at the end of synthesis. S2 was additionally covered with a thin polyacrylic acid film, after the preparation of the zeolite coating, from a solution containing 4% polymer by weight, as described in a recent study [18]. The post-synthesis treatment applied to zeolite coatings by covering them with thin polymer films was recently shown to improve the thermal and mechanical stabilities of these materials when compared to uncoated samples [18].…”

Section: Preparation Of Zeolite Coatingsmentioning

confidence: 99%

“…S2 was additionally covered with a thin polyacrylic acid film, after the preparation of the zeolite coating, from a solution containing 4% polymer by weight, as described in a recent study [18]. The post-synthesis treatment applied to zeolite coatings by covering them with thin polymer films was recently shown to improve the thermal and mechanical stabilities of these materials when compared to uncoated samples [18]. Thus, it should be useful to investigate how the adsorption kinetics and isotherms of zeolite coatings are affected by the inclusion of polymer layers.…”

Section: Preparation Of Zeolite Coatingsmentioning

confidence: 99%

Adsorption kinetics and isotherms of zeolite coatings directly crystallized on fibrous plates for heat pump applications

Atakan

Fueldner

Munz

et al. 2013

Applied Thermal Engineering

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Crystallization of zeolite X coatings on stainless steel by microwave heating

2014

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The possibility of crystallization of zeolite X coatings on metal plates in a microwave oven was investigated. Characterizations were performed by X-ray diffraction, scanning electron microscopy, laser microscopy and gas adsorption. Crystalline zeolite X coatings with mass equivalent thicknesses of up to about 100 mu m could be obtained on stainless steel plates. Heating the reaction mixture by microwaves instead of conventionally resulted in faster crystallization of zeolite X coatings on metal. The yield of zeolite was about 2.5-4.7 fold higher during different earlier periods of synthesis in the presence of microwave irradiation. The utilization of a device, containing graphite having good absorbance of microwaves, which was brought into firm contact with the metal plate, resulted in an increase of the zeolite yield by about 20 %. This indicated that the metal substrate profited from being heated conductively by the mentioned device, rather than being convectively heated by the reaction mixture

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Post-synthesis treatment for improving zeolite coating stability

Cited by 16 publications

References 23 publications

Preparation of Zeolite X Coatings on Soda-Lime Type Glass Plates

Preparation of Zeolite X Coatings on Soda-Lime Type Glass Plates

Adsorption kinetics and isotherms of zeolite coatings directly crystallized on fibrous plates for heat pump applications

Crystallization of zeolite X coatings on stainless steel by microwave heating

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