Effect of Fly Ash Content on Zeolite Synthesis from Coal Fly Ash Prepared by Hydrothermal Treatment.

Coal fly ash was modified to zeolitic materials by hydrothermal treatment at 90 ?C. The zeolite synthesis was studied as a function of the mole ratio of Na2O/SiO2 in the reaction mixtures. The results showed that NaP1 zeolite is obtained when the Na2O/SiO2 mole ratio was 0.7. Hydroxysodalite is the dominant zeolite phase in modified fly ash treated with a higher Na2O concentration solution (Na2O/SiO2 = 1.3). The IR and XRD methods were used to determine the phases present in the starting sample and in the zeolitic materials.

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Synthesis of Zeolite A from Mongolian Coal Fly Ash by Hydrothermal Treatment

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.271.1 ◽

2018 ◽

Vol 271 ◽

pp. 1-8 ◽

Cited By ~ 4

Author(s):

Ulambayar Rentsenorov ◽

Batmunkh Davaabal ◽

Jadambaa Temuujin

Keyword(s):

Fly Ash ◽

Hydrothermal Treatment ◽

Cation Exchange Capacity ◽

Coal Fly Ash ◽

Batch Composition ◽

Exchange Capacity ◽

Zeolite Synthesis ◽

Zeolite A ◽

Acid Pretreatment ◽

Type Zeolite

Raw coal fly ash and acid pretreated fly ash were used to synthesize A-type zeolite by hydrothermal treatment. In order to synthesize zeolite A an aqueous gel having a molar batch composition of Na2O:Al2O3:1.926SiO2:128H2O was utilized. Fly ash and zeolitic products were characterized by SEM, XRF, XRD and cation exchange capacity (CEC). After hydrothermal treatment, several types of zeolites were formed: zeolite A, analcime, faujasite and hydroxy-sodalite. The highest content of zeolite A was formed in the mixture treated at 80°C for 8 hours. CEC values of the zeolitic products were 28-38 times higher than that of in raw fly ash. Acid pretreatment which leads to low calcium and iron content is preferable method for processing of fly ash for the zeolite synthesis. Synthesized zeolite can be used for ion exchangers for water treatment.

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Zeolite Synthesis from Coal Fly Ash Prepared by Hydrothermal Treatment Method and Effect of Particle Size on Its Reaction Mechanism [Translated]†

KONA Powder and Particle Journal ◽

10.14356/kona.2001025 ◽

2001 ◽

Vol 19 (0) ◽

pp. 232-239

Author(s):

Kunihiro Fukui ◽

Hideto Yoshida ◽

Hironori Sakaguchi ◽

MItsuhiro Arita

Keyword(s):

Particle Size ◽

Reaction Mechanism ◽

Fly Ash ◽

Hydrothermal Treatment ◽

Coal Fly Ash ◽

Treatment Method ◽

Zeolite Synthesis ◽

Effect Of Particle Size

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Utilization of incineration fly ash from biomass power plants for zeolite synthesis from coal fly ash by hydrothermal treatment

Fuel Processing Technology ◽

10.1016/j.fuproc.2017.06.023 ◽

2017 ◽

Vol 167 ◽

pp. 92-98 ◽

Cited By ~ 23

Author(s):

Tomonori Fukasawa ◽

Akira Horigome ◽

Takayuki Tsu ◽

Achmad Dwitama Karisma ◽

Norio Maeda ◽

...

Keyword(s):

Fly Ash ◽

Hydrothermal Treatment ◽

Power Plants ◽

Coal Fly Ash ◽

Zeolite Synthesis ◽

Biomass Power Plants

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Synthesis of Zeolite Membranes from Coal Fly Ash

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.1749 ◽

2011 ◽

Vol 383-390 ◽

pp. 1749-1752

Author(s):

Shigeo Shirakura ◽

Shukuhei Kojima ◽

Kazuhiro Tanaka ◽

Hidetoshi Kita

Keyword(s):

Aqueous Solution ◽

Fly Ash ◽

Hydrothermal Treatment ◽

Coal Fly Ash ◽

Xrd Analysis ◽

Organic Liquids ◽

Zeolite Membranes ◽

Sem Observation ◽

Porous Supports ◽

Optimized Conditions

Zeolite membranes were successfully synthesized from coal fly ash by hydrothermal treatment onto 10-cm-long tubular porous supports. The membranes were characterized from XRD analysis, SEM observation and the pervaporation performance. Under the optimized conditions, LTA-type membrane from coal fly ash showed fairly efficient for the dehydration of organic liquids. The maximum selectivity reached more than 3000 with accompanying flux as high as 3.0 kg/(m2•h) for separation of 90 wt% EtOH aqueous solution at 75 °C.

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