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Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite
https://orcid.org/0000-0003-0266-8648
Abstract A palygorskitic-rich Algerian clay (Sif Pal) has been selected as Si source to synthesize zeolite LTA through a hydrothermal treatment by using sodium aluminate. Sif Pal is activated under reflux using hydrochloric acid solutions at different concentrations (4, 6 and 7 mol.L−1) in a ratio of 50 g.L−1 and then analysed using XRD, SEM and XRF analysis. The selected product (PalH1) is mixed with NaOH solutions at different concentrations (1, 2, 3, 4 and 5 mol.L−1), diverse NaAl2O3 quantities (1, 2, 3 and 5 g) and analysed after several nucleation (1, 2, 3 and 5 h) and crystallization (6, 18 and 24 h) times to check the influence of these parameters on the synthesis of zeolite LTA. To obtain almost pure (> 98%) zeolite LTA, the better experimental conditions were: 3 mol.L−1 of NaOH solutions, 3 g of sodium aluminate, 3 h for nucleation and 24 h for crystallization.
Graphical abstract Display Omitted
Highlights Palygorskite is a natural fibrous clay available in the Est of Algeria. Use of palygorskite as natural silica source. Identification of key parameters involved for the synthesis of zeolite LTA. Synthesis of zeolite LTA requires moderate quantity of reagents.
Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite
https://orcid.org/0000-0003-0266-8648
Abstract A palygorskitic-rich Algerian clay (Sif Pal) has been selected as Si source to synthesize zeolite LTA through a hydrothermal treatment by using sodium aluminate. Sif Pal is activated under reflux using hydrochloric acid solutions at different concentrations (4, 6 and 7 mol.L−1) in a ratio of 50 g.L−1 and then analysed using XRD, SEM and XRF analysis. The selected product (PalH1) is mixed with NaOH solutions at different concentrations (1, 2, 3, 4 and 5 mol.L−1), diverse NaAl2O3 quantities (1, 2, 3 and 5 g) and analysed after several nucleation (1, 2, 3 and 5 h) and crystallization (6, 18 and 24 h) times to check the influence of these parameters on the synthesis of zeolite LTA. To obtain almost pure (> 98%) zeolite LTA, the better experimental conditions were: 3 mol.L−1 of NaOH solutions, 3 g of sodium aluminate, 3 h for nucleation and 24 h for crystallization.
Graphical abstract Display Omitted
Highlights Palygorskite is a natural fibrous clay available in the Est of Algeria. Use of palygorskite as natural silica source. Identification of key parameters involved for the synthesis of zeolite LTA. Synthesis of zeolite LTA requires moderate quantity of reagents.
Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite
https://orcid.org/0000-0003-0266-8648
Abstract A palygorskitic-rich Algerian clay (Sif Pal) has been selected as Si source to synthesize zeolite LTA through a hydrothermal treatment by using sodium aluminate. Sif Pal is activated under reflux using hydrochloric acid solutions at different concentrations (4, 6 and 7 mol.L−1) in a ratio of 50 g.L−1 and then analysed using XRD, SEM and XRF analysis. The selected product (PalH1) is mixed with NaOH solutions at different concentrations (1, 2, 3, 4 and 5 mol.L−1), diverse NaAl2O3 quantities (1, 2, 3 and 5 g) and analysed after several nucleation (1, 2, 3 and 5 h) and crystallization (6, 18 and 24 h) times to check the influence of these parameters on the synthesis of zeolite LTA. To obtain almost pure (> 98%) zeolite LTA, the better experimental conditions were: 3 mol.L−1 of NaOH solutions, 3 g of sodium aluminate, 3 h for nucleation and 24 h for crystallization.
Graphical abstract Display Omitted
Highlights Palygorskite is a natural fibrous clay available in the Est of Algeria. Use of palygorskite as natural silica source. Identification of key parameters involved for the synthesis of zeolite LTA. Synthesis of zeolite LTA requires moderate quantity of reagents.
Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite
Dali Youcef, Lamia (author) / López-Galindo, Alberto (author) / Verdugo-Escamilla, Cristóbal (author) / Belaroui, Lala Setti (author)
Applied Clay Science ; 193
2020-05-19
Article (Journal)
Electronic Resource
English
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