Conventional hydrothermal synthesis of Na-A zeolite from cupola slag and aluminum sludge

Anuwattana, Rewadee; Khummongkol, Pojanie

doi:10.1016/j.jhazmat.2008.11.020

Cited by 79 publications

(31 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[7][8][9] By varying the composition of synthesis solutions it is possible to obtain zeolites with different structures or the same zeolite showing different chemical compositions. [10][11][12] In summary, keeping the conditions of preparation fixed, a simple variation in the Si/Al ratio may result in different zeolites, for example, faujasite X and sodalite (Si/Al < 2), mordenite and faujasite Y (2 < Si/Al < 5), ZSM-5, ZSM -12 and Beta (Si/Al > 5). 13 Zeolite beta (BEA) is a large pore crystalline aluminosilicate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

Nascimento¹,

Figueredo²,

Silva³

et al. 2017

Rev. Virtual Quim.

View full text Add to dashboard Cite

. Em outros ensaios, foram obtidas fases secundárias de NaAlSiO 4 e SiO 2 , bem como zeólita ZSM-5, analcima, omega e Linde B2.Palavras-chave: BEA; razão Si/Al; Tempo; Temperatura. AbstractThe choice of synthesis parameters influences obtainment of a suitable material for use in several applications. In this paper, zeolite beta (BEA) was successfully obtained by hydrothermal synthesis, assessing the following parameters: Si/Al ratio, time and crystallization temperature. The synthesized materials were characterized by X-ray diffraction (XRD), Fourier-Transfer Infrared (FTIR) spectroscopy, thermogravimetry (TG and DTG) and N 2 adsorption-desorption isotherm analyses. Xray diffraction showed that the change of only one of these parameters acts on the formation of the desired microporous structure. BEA was obtained in the Si/Al ratio equal 8, with a crystallization time of 4 days at 170 °C, presenting a specific area of 437 m . In other assays, secondary phases of NaAlSiO 4 and SiO 2 were obtained, as well as ZSM-5 zeolite, analcime, omega and linde B2.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

Nascimento¹,

Figueredo²,

Silva³

et al. 2017

Rev. Virtual Quim.

View full text Add to dashboard Cite

show abstract

“…Over recent years, unconventional starting materials such as coal fly ash [2][3][4][5][6][7][8], metakaolin [9], cupola slag and aluminum sludge [10], municipal solid waste ash [11], chrysotile and rice husk [12] have also been used to synthesize zeolites. The synthesis of zeolite from coal fly ash was pioneered by Holler and Wirsching [13], and since then numerous researchers have followed in synthesizing different types of zeolites [5].…”

Section: Introductionmentioning

confidence: 99%

In situ ultrasonic monitoring of zeolite A crystallization from coal fly ash

Musyoka

Petrik

Hums³

et al. 2012

Catalysis Today

View full text Add to dashboard Cite

In this study, high phase purity of zeolite A was prepared from coal fly ash precursors. The molar regime of both the clear solution extract and unseparated fly ash slurry was adjusted to achieve the right com-position for zeolite A crystallization. The formation process for zeolite A from coal fly ash precursors was monitored in detail using an in situ ultrasonic system and was complemented by use of ex situ techniques such as XRD, FTIR, SEM and FTIR. The findings from both the in situ ultrasonic monitoring process and ex situ techniques clearly contributed significantly in unmasking the formation process of zeolite A from coal fly ash compared to previous studies reported in the literature. The study also enriches the existing body of literature by deeply investigating the gel-solutioncrystal interactions starting from this complex feedstock. Comparable ultrasonic signals were generated when both clear and unseparated fly ash based precursor solutions were used during the zeolite synthesis process.

show abstract

“…Commercial zeolite A was used as a standard. The total sum of the intensity of major peaks in XRD patterns is a semi-quantitative index of the crystallinity of these samples [11,14,15].…”

Section: Resultsmentioning

confidence: 99%

Effects of ultrasonic treatment on zeolite NaA synthesized from by-product silica

Vaičiukynienė

Kantautas

Vaitkevičius

et al. 2015

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

The synthesis of zeolite NaA from silica by-product was carried out in the presence of 20 kHz ultrasound at room temperature. Zeolites obtained in this type of synthesis were compared to zeolites obtained by performing conventional static syntheses under similar conditions. The sonication effects on zeolite NaA synthesis were characterized by phase identification, crystallinity etc. The effects of different parameters such as crystallization time and initial materials preparation methods on the crystallinity and morphology of the synthesized zeolites were investigated. The final products were characterized by XRD and FT-IR. It was possible to obtain crystalline zeolite NaA from by-product silica in the presence of ultrasound.

show abstract

Conventional hydrothermal synthesis of Na-A zeolite from cupola slag and aluminum sludge

Cited by 79 publications

References 13 publications

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

In situ ultrasonic monitoring of zeolite A crystallization from coal fly ash

Effects of ultrasonic treatment on zeolite NaA synthesized from by-product silica

Contact Info

Product

Resources

About