New hydrothermal route for the synthesis of high purity nanoparticles of zeolite Y from kaolin and quartz

Wang, Jingquan; Huang, Ya‐Xi; Pan, Yuanming; Mi, Jin‐Xiao

doi:10.1016/j.micromeso.2016.06.010

Cited by 47 publications

(26 citation statements)

References 40 publications

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“…The preferential formation of zeolite Y in-stead of analcime, which has the same chemical composition but lower water content, was expected (Maldonado et al, 2013). Several authors have reported the formation of zeolite Y at lower temperature (Barth-Wirsching and Holler, 1989;Gottardi and Galli, 1985;Wang et al, 2016). Only at temperatures ≥100°C, zeolite Y readily transforms into analcime (Li et al, 2013;Maldonado et al, 2013;Wang et al, 2010).…”

Section: Analysis Of Solid Phasesmentioning

confidence: 90%

Zeolite formation in the presence of cement hydrates and albite

Lothenbach

Bernard

Mäder

2017

Physics and Chemistry of the Earth, Parts A/B/C

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Zeolite formation caused by interactions between cement hydrates and rock forming minerals was investigated by two sets of batch experiments and supported by thermodynamic modelling. The first set of batch experiments investigated the interaction between calcium silicate hydrates (C-S-H) (Ca 0.8 SiO 2.8 •32H 2 O) and ettringite (Ca 6 Al 2 (SO 4) 3 (OH) 12 (H 2 O) 26) as cement hydrate minerals and albite (NaAlSi 3 O 8) as a rock forming mineral at 20, 50 and 80°C. The dissolution of C-S-H, ettringite and albite led to relatively high calcium and low silicon and sodium concentrations and to the formation of zeolite P(Ca) (Ca 2 Al 2 Si 2 O 8 4.5H 2 O) and natrolite (Na 2 Al 2 Si 3 O 10 2H 2 O). The second set of experiments used ettringite and silica fume as cement phases and NaAlO 2 to represent a rock forming mineral. High initial sodium, hydroxide and aluminium concentrations were observed leading to the precipitation of zeolite X (Na 2 Al 2 Si 2.5 O 9 6.2H 2 O) and C-S-H gel at 20 and 50°C where only 40 to 60% of the silica had reacted after 3 years. At 80°C where more silica fume had reacted, the formation of SiO 2-rich zeolite Y (Na 2 Al 2 Si 4 O 12 8H 2 O) and chabazite (CaAl 2 Si 4 O 12 6H 2 O) was observed. Solubility products for the zeolite P(Ca), natrolite, chabazite, zeolite X and zeolite Y were obtained from the measured concentrations. Comparison with values published in the literature shows a high

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Section: Analysis Of Solid Phasesmentioning

confidence: 90%

Zeolite formation in the presence of cement hydrates and albite

Lothenbach

Bernard

Mäder

2017

Physics and Chemistry of the Earth, Parts A/B/C

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“…The formed silicates were more soluble in hydrothermal medium and participated directly in the formation of zeolites. Moreover, Wang et al [28] showed that the formation of zeolite Y with kaolin and quartz requires high concentration of NaOH and a higher temperature (2008C). The contents of Fe and Cu were 3.35% and 0.092%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Barrer [27] reported the quartz solubility in water being 0 mg/L at 1008C and 70 mg/L at [28] showed that the formation of zeolite Y with kaolin and quartz requires high concentration of NaOH and a higher temperature (2008C). Crystalline silicates were not reactive and can decrease the amount of zeolite to obtain.…”

Section: Characterization Of Cmtmentioning

confidence: 99%

Optimization of the synthesis process of zeolites with high cation exchange capacity using copper mine tailings as raw material

Espejel‐Ayala¹,

Ramírez-Zamora

2017

Env Prog and Sustain Energy

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This study presents the optimization of the synthesis process of zeolites with high cation exchange capacity using copper mine tailings as raw materials by means of a Central Composite Design. The method consists of two steps: a fusion process with NaOH and the hydrothermal treatment. The results show the formation of zeolite P and cancrinite. Optimal conditions to synthesize zeolite P (94%) are tailings/NaOH weight ratio 1:1.2 (g/g), at 900°C and 2 h (fusion process); 90°C, 102 h and solid/liquid ratio = 0.25 g/mL (hydrothermal treatment). The use of copper mine tailings in the synthesis of zeolites represents benefits to the environmental by the reduction of the amount of tailings to be disposed off. This mitigates the contamination caused by this residue. The product obtained can be used on‐site or off‐site in the remediation of water resources contaminated with metals. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 996–1002, 2018

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“…Moreover, kaolin was used in catalyst industry either as, support or a binder for many vital industrial processes such as FCC cracking processes [8]. Furthermore, metakaolinite is used as a raw material for preparation of many types of zeolites [9][10][11][12][13][14][15]. Due to the high importance of such clay many governments invest in exploring and magnifying the utilization of such important clay.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous photodegradation and removal of organic-inorganic pollutants over zeolite prepared from Saudi Arabia kaolin

elmaksod¹,

Kosa

Alzahrani³

et al. 2019

Egypt. J. Chem.

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I N THIS paper, TiO 2 impurities exist in kaolin were investigated for the first time as active centers for photo degradation of M.B (Methylene Blue) dye. The study extends to examine the same impurities after its transformation into NaP zeolite. Simultaneous removal of heavy metals (Pb 2+ , Cu 2+ , Ni 2+ , Co 2+) in presence of organic dye over metakaolinite phase and NaP zeolite was performed in presence and absence of UV irradiation. The samples were characterized using XRD, SEM, EDX, Diffuse UV-Vis spectrophotometer and finally drawing the kinetic curves of removal of heavy metal ions and M.B dye. The results showed that the TiO 2 impurities in metakaolinite exists in anatase form and maintain its existence in the transformed NaP zeolite with the same phase. Both NaP and metakaolinite showed photo catalytic activity towards degradation of M.B dye. However, the NaP zeolite showed superior behavior for simultaneous removal of both pollutants with UV Irradiation. Investigation and mode of removal of both samples were investigated.

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New hydrothermal route for the synthesis of high purity nanoparticles of zeolite Y from kaolin and quartz

Cited by 47 publications

References 40 publications

Zeolite formation in the presence of cement hydrates and albite

Zeolite formation in the presence of cement hydrates and albite

Optimization of the synthesis process of zeolites with high cation exchange capacity using copper mine tailings as raw material

Simultaneous photodegradation and removal of organic-inorganic pollutants over zeolite prepared from Saudi Arabia kaolin

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