The Route of Hydrothermal Synthesis Zeolite-A from the Low-Grade Perak kaolin, Malaysia

Silicon ◽  
2022 ◽  
Author(s):  
Norsuhailizah Sazali ◽  
Zawati Harun ◽  
Tijjani Abdullahi ◽  
Noor Hasliza Kamarudin ◽  
Norazlianie Sazali ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Grade ◽  
Zeolite A

scholarly journals Hydrothermal Synthesis of Zeolite A Using Blast Furnace Slag

2005 ◽  
Vol 45 (6) ◽  
pp. 937-945 ◽  
Author(s):  
Yoshiyuki SUGANO ◽  
Ryouji SAHARA ◽  
Taichi MURAKAMI ◽  
Takayuki NARUSHIMA ◽  
Yasutaka IGUCHI ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Hydrothermal Synthesis ◽  
Blast Furnace Slag ◽  
Zeolite A ◽  
Furnace Slag

Facile activation of lithium slag for the hydrothermal synthesis of zeolite A with commercial quality and high removal efficiency for the isotope of radioactive 90Sr

2022 ◽  
Author(s):  
Binyu Wang ◽  
Jing Li ◽  
Xue Zhou ◽  
Wenfeng Hao ◽  
Shaoqing Zhang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Solid Waste ◽  
Removal Efficiency ◽  
Value Added ◽  
Zeolite A ◽  
Lithium Slag ◽  
Value Added Products

With the quick development of lithium industry, a large amount of solid waste of lithium slag are produced. Making high value-added products from lithium slag can not only alleviate the...

Comparative study of hydrothermal synthesis routes of zeolite A

2020 ◽  
Vol 33 ◽  
pp. 1984-1987
Author(s):  
Kristine Vegere ◽  
Rita Kravcevica ◽  
Andrey E. Krauklis ◽  
Talis Juhna
Keyword(s):  
Hydrothermal Synthesis ◽  
Comparative Study ◽  
Zeolite A ◽  
Synthesis Routes

scholarly journals One-Step Hydrothermal Synthesis of Zeolite X Powder from Natural Low-Grade Diatomite

Materials ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 906 ◽  
Author(s):  
Guangyuan Yao ◽  
Jingjing Lei ◽  
Xiaoyu Zhang ◽  
Zhiming Sun ◽  
Shuilin Zheng
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Grade ◽  
Zeolite X ◽  
One Step

Hydrothermal synthesis of Zeolite NaA from Kaolin

2019 ◽  
Vol 12 (05) ◽  
pp. 1950075 ◽  
Author(s):  
Peng Wang ◽  
Qi Sun ◽  
Yujiao Zhang ◽  
Jun Cao ◽  
Xingmao Li
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Synthesis Method ◽  
Textural Properties ◽  
Treatment Temperature ◽  
Low Grade ◽  
Tem Analysis ◽  
X Ray ◽  
Zeolite Naa ◽  
Adsorption Desorption

Zeolite NaA was successfully synthesized from low-grade kaolin via hydrothermal synthesis method. The properties of the zeolite NaA were characterized by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray fluorescence (XRF), scanning electron microscopy (SEM)-energy-dispersive spectrometry (EDS), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), and thermogravimetry (TG)-differential thermal analysis (DTA). TEM analysis indicated the formation of body-centered cubic crystal zeolite NaA and the polycrystallinity of the zeolite NaA structure. The textural properties of the zeolite NaA were further studied by N2 adsorption-desorption technique. In addition, the TG-DTA study confirmed that the heat treatment temperature of the zeolite NaA should be controlled below 600∘C.

Effect of Alkaline Activation on Low Grade Natural Kaolin for Synthesis of Zeolite A

2016 ◽  
Vol 872 ◽  
pp. 206-210 ◽  
Author(s):  
Panuruj Asawaworarit ◽  
Nuwong Chollacoop ◽  
Nawin Viriya-Empikul ◽  
Apiluck Eiad-Ua
Keyword(s):  
Hydrothermal Process ◽  
Conventional Technique ◽  
Low Grade ◽  
Zeolite A ◽  
X Ray Diffraction ◽  
Alkaline Activation ◽  
X Ray ◽  
Sodium Aluminosilicate ◽  
Aluminosilicate Gel ◽  
Amorphous Aluminosilicate

The conventional technique to synthesizes zeolite A from kaolin is calcination. However, this technique has one drawback since, the impurities in kaolin, such as muscovite and quartz, remain. Therefore, the hydrothermal process without calcination is used to synthesize high purity zeolite A. Hydrothermal synthesis without calcination can be separated into two steps, namely first and second hydrothermal steps. Alkaline activation reaction in the first hydrothermal step was used to study the effect of NaOH concentration ranging from 4M, 6M, 8M, 10M to 12M at 200°C for 3 hours. In this step, sodium aluminosilicate (cancrinite and nepheline hydrate) was produced and then dissolved in HCl. After filtration, the impurity was removed, and adjusted for neutral pH of 7 to form amorphous aluminosilicate gel. For the second hydrothermal step, amorphous gel was mixed with NaOH (1-4M) to form zeolite A at 90°C for 3 days. The x-ray diffraction (XRD) and Scanning Electron Microscope (SEM) were used for characterization.

Hydrothermal Synthesis of Zeolite a Using Non-Calcined Diatomite

2018 ◽  
Vol 930 ◽  
pp. 3-7 ◽  
Author(s):  
Alexandre Fontes Melo de Carvalho ◽  
Tiago Roberto da Costa ◽  
Gilvan Pereira de Figueredo ◽  
José Antônio Barros Leal Reis Alves ◽  
Rodrigo César Santiago ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Crystallite Size ◽  
Powder Diffraction ◽  
Average Crystallite Size ◽  
Zeolite A ◽  
X Ray ◽  
Prepared Sample ◽  
Scanning Electron

Optimization and reduction of zeolite A synthesis costs are the focus of several studies. Attention has been given to the use of residues and natural materials rich in Si and Al, such as diatomite. Diatomite needs to be calcined above 500°C to be used, which increases processing costs. This study aimed at evaluating the use of diatomite without calcination in preparing zeolite A. Alkaline hydrothermal synthesis melting and 24 h of crystallization were carried out. The materials were characterized by XRD (X-ray powder diffraction), XRF (X-ray fluorescence), BET (N2physisorption) and SEM (Scanning Electron Microscopy). XRD data and refinement show that the obtained material presents 99.84% crystallinity, average crystallite size of 54.92 nm, and a semi-quantitative percentage of 79% zeolite A. SiO2and Al2O3contents in the prepared sample proved the ratio SiO2/Al2O3= 2. The micrographies show cubic particles and agglomerated sodalite.

scholarly journals Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4915
Author(s):  
Norway Pangan ◽  
Susan Gallardo ◽  
Pag-asa Gaspillo ◽  
Winarto Kurniawan ◽  
Hirofumi Hinode ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Cation Exchange ◽  
Corn Stover ◽  
Cation Exchange Capacity ◽  
Thermo Gravimetric Analysis ◽  
Exchange Capacity ◽  
Gravimetric Analysis ◽  
Curing Time ◽  
Zeolite A ◽  
The Impact

This study deals with the impact of calcination, alkalinity, and curing time parameters on the hydrothermal synthesis of zeolite A. The zeolite A sample, produced from corncob-stalk-and-leaves (corn stover) ash was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that calcination, alkalinity, and curing time have significant effects on the crystallization and the morphology of zeolite A. In addition, these parameters also impacted the cation exchange capacity. Furthermore, the synthesized zeolite A was obtained using a calcination temperature of 5000 °C within two hours of airflow, which is much lower than the temperatures previously reported in the literature for an agricultural waste and other waste materials. A fusion ratio of corn stover ash:NaOH of 1.0:1.5 and a curing time of nine hours were achieved. This is a major result as this curing time is much lower than those featured in other studies, which can reach up to twenty-four hours. In this paper, cubic crystal with rounded edge of zeolite A, having a cation exchange capacity of 2.439 meq Na+/g of synthesized anhydrous zeolite A, was obtained, which can be a good candidate for ion-exchange separation.

scholarly journals Hydrothermal Synthesis of Zeolite A Using Natural Kaolin from KG. Gading Bongawan Sabah

2014 ◽  
Vol 14 (23) ◽  
pp. 3282-3287 ◽  
Author(s):  
E.B.G. Johnson ◽  
Sazmal E. Arshad ◽  
Jahimin Asik
Keyword(s):  
Hydrothermal Synthesis ◽  
Zeolite A
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