Synthesis of pure Na–X and Na–A zeolite from bagasse fly ash

Purnomo, Chandra Wahyu; Salim, Chris; Hinode, Hirofumi

doi:10.1016/j.micromeso.2012.06.007

Cited by 154 publications

(74 citation statements)

References 18 publications

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“…Note that the zeolites can be divided into seven groups where each group unites the zeolites with the same connections between TO 4 (T refer to Al or Si) tetrahedral 14,[17][18][19][20] . The primary structural units are the SiO 4 and AlO 4 tetrahedra, while these condary units are combined from these tetrahedral. The structure of the zeolite X is formed by the simple β-cages which are composed of 24T-atoms.…”

Section: The Effect Of Hydrothermal Timementioning

confidence: 99%

“…The sodalite and zeolite Na-P were seemed to be formed by the conversion of metastable Na-X zeolite into more stable zeolite phase 27) . Zeolite Na-P is more stable than zeolite Na-X, thus higher curing temperatures or longer curing time allow the formation of more stable state of this zeolite type without any precursor 4) . It can be seen that no crystalline Na-P zeolite was detected in the ZP4T90t6 sample (Fig.…”

Section: The Effect Of Hydrothermal Temperaturementioning

confidence: 99%

“…Large amount of y ash is being disposed of in opened land ll sites, creating problems with air, groundwater and soil pollution with harmful elements [4][5][6] . Recently, acid extracting alumina from y ash becomes the main development trend.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Pure Na–X and Na–P Zeolite from Acid-Extracting Residues of CFB Fly Ash by a Single-Step Hydrothermal Method

et al. 2016

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Acid-extracting residue of circulating uidized bed (CFB) y ash is still underutilized leaving disposal problems. In fact, high silica content inside this material opens a possibility to become a potential zeolites precursor. In this study, ne particles of acid residues have been reused to prepare zeolite Na-X and Na-P with high purity and intensity. Acid residue was used to synthesize zeolite Na-X and Na-P using a single-step hydrothermal process. The effects of crystallization time, temperature and sodium hydroxide concentration on the end products were investigated. The results revealed that crystallization time and temperature determined whether or not zeolite Na-X or Na-P was formed. The zeolites were characterized in terms of their mineralogical composition, morphology, and fourier-transform infrared spectroscopy.

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Section: The Effect Of Hydrothermal Timementioning

confidence: 99%

Section: The Effect Of Hydrothermal Temperaturementioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Pure Na–X and Na–P Zeolite from Acid-Extracting Residues of CFB Fly Ash by a Single-Step Hydrothermal Method

et al. 2016

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“…The first preparation step after drying raw material in oven at 100 °C overnight was the extraction of silicon and aluminum content from RHA particles [7]. 10 g of ash was mixed with sodium hydroxide powder (Waco; 97 wt.% NaOH) with weight ratio of RHA: NaOH of 1:2 and heated at temperature of 300 °C for 1 h. The mixture was then cooled to room temperature.…”

Section: Silica Extraction From Rice Husk Ashmentioning

confidence: 99%

“…The study of RHA (rice husk ash) showed high content of silica and alumina similar to raw materials typically used in zeolite synthesis [3]. These raw materials can be coal fly ash [4,5], oil shale ash [6], and bagasse fly ash [7]. Therefore, rice husk ash is a potential raw material for zeolite synthesis.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Thailand Rice Husk Ash from Biomass Power Plant and Synthesized Zeolite

Santasnachok¹,

Kurniawan²,

Hinode³

2015

JLS

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Thailand rice husk ash was used to synthesize zeolite by hydrothermal treatment. Raw rice husk ash material and zeolitic products were characterized in terms of specific surface area (BET method), morphological analysis (SEM), mineralogical composition (XRD) and CEC (cation exchange capacity). LOI (Loss of ignition) of rice husk ash was also evaluated. Result indicated that the rice husk ash sample from Roi-Et Green power plant in the Northeastern of Thailand with combustion temperature of 650 °C has a high content of SiO 2 (above 90 wt.%). Zeolite-X from rice husk ash with high content of Si was successfully synthesized using hydrothermal treatment. The zeolitic material synthesized with the optimal condition possessed a maximum value of CEC of 503 meq/100g, and it has potentiality to be used as ion exchangers.

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Rapid synthesis of zeolite P from potassic rocks by gel‐like‐solid phase method

Yang

Guo

et al. 2021

Asia-Pacific J Chem Eng

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A facile, rapid, and energy‐saving gel‐like‐solid method was applied to prepare zeolites from natural minerals. Using potassic rocks (PRs) activated by the alkali fusion decomposition method together with silica‐alumina xerogel as silicon‐ and aluminum‐species, zeolite P has been successfully synthesized via gel‐like‐solid phase method. The effects of crystallization time (t), crystallization temperature (T), m (PRs)/m (xerogel) ratios, and n(H2O)/n (SiO2) ratios on the crystallinity and morphology of zeolite P were investigated. The optimal synthesis conditions were m (PRs)/m (xerogel) of 0.185, n(H2O)/n (SiO2) of 28.12, crystallization t of 3 h, and crystallization T of 140°C. The synthesized zeolite P featuring high crystallinity possessed spherical morphology aggregated by small grains and was applied in the ion exchange for Ca2+ and Mg2+ ions. The maximum Ca2+ and Mg2+ ions exchange capacities of zeolite P could reach 415 mgCaCO3·g−1 and 162 mgMgCO3·g−1, respectively. Compared with other published materials, the synthesized zeolite P exhibited satisfactory Ca2+ and Mg2+ ions exchange capacities. The above results demonstrated that the gel‐like‐solid phase method could shorten the crystallization t and enhance the crystallinity of zeolites synthesized from natural minerals and solid waste, showing a great potential in actual applications.

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Synthesis of pure Na–X and Na–A zeolite from bagasse fly ash

Cited by 154 publications

References 18 publications

Synthesis of Pure Na–X and Na–P Zeolite from Acid-Extracting Residues of CFB Fly Ash by a Single-Step Hydrothermal Method

Synthesis of Pure Na–X and Na–P Zeolite from Acid-Extracting Residues of CFB Fly Ash by a Single-Step Hydrothermal Method

Characterization of Thailand Rice Husk Ash from Biomass Power Plant and Synthesized Zeolite

Rapid synthesis of zeolite P from potassic rocks by gel‐like‐solid phase method

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