Wet ball milling of zeolite HY

Akçay, Kani; Sirkecioğlu, Ahmet; Tatlıer, Melkon; Savaşçı, Ömer Tunç; Erdem-Şenatalar, Ayşe

doi:10.1016/j.powtec.2004.03.012

Cited by 63 publications

(42 citation statements)

References 16 publications

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“…The small decrease in XRD reflection intensity provides some indication of the particle size diminution. According to Akçay et al [30] the intensity of XRD peaks decreases with milling time. However, the crystalline structure is preserved even after 8 h of grinding.…”

Section: Reac Kinet Mech Catmentioning

confidence: 97%

“…The grinding process applied for modification of parent zeolites ZSM-5 was performed with an electric grinder (Narva, GM9458) over different periods of time (10,30,60, and 120 min). Dry ground catalyst was subsequently dispersed in water and treated with ultrasound for 1 h at room temperature (RT) with subsequent separation by centrifugation at 6000 rpm.…”

Section: Experimental Catalyst Preparation and Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of the catalytic activity of H-ZSM-5 zeolites for glycerol acetalization by mechanical grinding

Kowalska-Kuś

Held

Nowiǹska

2015

Reac Kinet Mech Cat

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The synthesis of 2,2-dimethyl-1,3-dioxolane-4-methanol (solketal) from acetalization of glycerol with acetone was carried out over two types of ZSM-5 zeolites of similar Si/Al ratio (=12.5 and 13.5) characterized with different particle sizes. The reaction was performed in a liquid phase, under mild reaction conditions. The applied samples showed very different glycerol conversion depending on the particle size of the catalysts. Using large particle materials results in relatively low activity in the studied reaction due to the long diffusion way of substrates and products. The modification of commercial zeolites by means of grinding results in the formation of fine agglomerates and brings about a significant increase in solketal yield.

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Section: Reac Kinet Mech Catmentioning

confidence: 97%

Section: Experimental Catalyst Preparation and Characterizationmentioning

confidence: 99%

Enhancement of the catalytic activity of H-ZSM-5 zeolites for glycerol acetalization by mechanical grinding

Kowalska-Kuś

Held

Nowiǹska

2015

Reac Kinet Mech Cat

View full text Add to dashboard Cite

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“…The collapse of the crystal structure can be desired in some cases since different strength of Bronsted and Lewis acid and base sites can thus be obtained [1,2]. This, in turn, can provide a better catalytic performance [3].…”

Section: Introductionmentioning

confidence: 99%

Control of Natural Zeolite Properties by Mechanical Activation in Stirred Media Mill

Bohács¹,

Faitli²,

Bokányi³

et al. 2017

Archives of Metallurgy and Materials

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Due to the special characteristics of zeolites, they can be applied in a very wide range of industries, i.e. agricultural, environmental or water treatment purposes. Generally, high added value zeolite products are manufactured by micro-or nanogrinding. However, these processes require high energy input and cause significant wearing of the mill parts. Therefore, the optimization of zeolite grinding, as well as the control of its properties are of a great importance. In the present paper a Hungarian natural zeolite was mechanically activated in stirred media mill for various residence times in distilled water, meanwhile the particle size distribution and the grinding energy were measured. Additionally, on-line tube rheometer was used to study the rheology of the suspension during the grinding process. The particle interaction and the suspension aggregation stability were detected by zeta-potential measurements. Structural changes due to the mechanical activation process were monitored by FTIR. It was found that the material structure of the zeolite, as well as the rheological behaviour of the zeolite suspension and its aggregation stability had been altered due to the mechanical activation in the stirred media mill. It can be concluded that the zeolite product properties can be modified by mechanical activation in order to produce a high added value tailored material.

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“…According to such disadvantages, various techniques have been developed. Mechanically, size reduction of zeolite particles using various types of mills has recently been alternated (Akçay et al 2004;Charkhi et al 2010;Rodríguez-Iznaga et al 2002;Xie and Kaliaguine 1997). High energy of ball milling, the reduction of crystallinity of the mill and failure in the zeolite crystal structure are some problems of these methods (Charkhi et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Heavy metals adsorption by nanozeolites: effect of sodium hexametaphosphate

2016

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In this study, for the first time, sodium hexametaphosphate (SHMP) was used as a dispersant in the production of nanozeolites. In addition, the effect of SHMP on the adsorption of ion metals by nanozeolite was investigated. In order to characterize the prepared nanozeolite by a planetary mill, the scanning electron microscope (SEM) was used. The SEM photographs showed that the planetary mill could produce the nanoparticles of zeolites. Furthermore, according to the SEM and X-ray diffraction (XRD) results, the zeolite samples milled with SHMP have regular and fine particles in comparison with nanozeolites produced without SHMP. On the other hand, the nanozeolites produced with SHMP have high qualification. According to the size fraction results, in the presence of SHMP, less than 15 % (3 g) of the milled sample remained on the 20-micron sieve, while 70 % (14 g) of the milled sample without SHMP remained on the 20-micron sieve. Finally, a series of experiments was performed to study the effect of SHMP on the adsorption of nickel, cadmium and copper ions using nanoparticles of zeolite. As a result, the adsorption percentage of nickel and cadmium on nanozeolites pretreated by SHMP is higher for times less than 2 h and more than 6 h in comparison with nanozeolites not pretreated by SHMP. On the other hand, the effect of SHMP on the adsorption of copper by nanozeolite is not significant. This insignificant effect probably occurs due to the stronger interaction of Cu 2+ and AlO 4− than that of Cu 2+ and SHMP.

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Wet ball milling of zeolite HY

Cited by 63 publications

References 16 publications

Enhancement of the catalytic activity of H-ZSM-5 zeolites for glycerol acetalization by mechanical grinding

Enhancement of the catalytic activity of H-ZSM-5 zeolites for glycerol acetalization by mechanical grinding

Control of Natural Zeolite Properties by Mechanical Activation in Stirred Media Mill

Heavy metals adsorption by nanozeolites: effect of sodium hexametaphosphate

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