Zeolites P1 Formation by Hydrothermal Alkali Fusion of Coal Fly Ash

2013 ◽  
Vol 726-731 ◽  
pp. 592-597
Author(s):  
Feng Xia Zhang ◽  
Bin Yang ◽  
Ming Yu Ma ◽  
Shu Hong Sun
Keyword(s):  
Fly Ash ◽  
Mine Water ◽  
High Efficiency ◽  
Coal Fly Ash ◽  
Reaction Products ◽  
Experimental Conditions ◽  
Heavy Metal Cations ◽  
Lead And Cadmium ◽  
Alkali Fusion ◽  
Powdered Coal

Fly ash is produced from the combustion of powdered coal and used to synthesize zeolite by alkali fusion followed by hydrothermal treatment with stirring. By varying the experimental conditions different types of zeolite were produced. In this study, mixture of sodium hydroxide and fly ash in a pre-determined ratio, was milled and fused at 700°C for 1h.The resultant fused mixture added to water in a Teflon reaction vessel and incubated at a temperature of 100°C and autogenously pressure. At the end, the reaction products recovered by filtration. The synthesized zeolite was characterized using various techniques such as X-ray diffraction, scanning electron microscopy. The zeolite-P1 was tested for decontamination potential of mine water. High removal efficiency was observed in the first treatment, but varied for different contaminants. The synthesised zeolite-P1 exhibited a high efficiency for the removal of heavy metal cations, such as zinc, copper, lead and cadmium from contaminated mine water.

scholarly journals Synthesis of Zeolite from Fly Ash and Removal of Heavy Metal Ions from Newly Synthesized Zeolite

2010 ◽  
Vol 7 (4) ◽  
pp. 1200-1205 ◽  
Author(s):  
Parag Solanki ◽  
Vikal Gupta ◽  
Ruchi Kulshrestha
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Coal Fly Ash ◽  
Proximate Analysis ◽  
13X Zeolite ◽  
Alkali Fusion ◽  
Type Zeolite ◽  
The Cost

Coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. Characteristics of the various Fly ash samples were carried out. Coal proximate analysis was done. Batch experiment was carried out for the adsorption of some heavy metal ions on to synthesized Zeolite. The cost of synthesized zeolite was estimated to be almost one-fifth of that of commercial 13X zeolite available in the market.

scholarly journals Synthesis of zeolite-P from coal fly ash derivative and its utilisation in mine-water remediation

2010 ◽  
Vol 106 (5/6) ◽  
Author(s):  
Leslie F. Petrik ◽  
Viswanath R.K. Vadapalli ◽  
Wilson M. Gitari ◽  
Annabelle Ellendt ◽  
Gillian Balfour
Keyword(s):  
Fly Ash ◽  
Mine Water ◽  
Coal Fly Ash ◽  
Water Remediation ◽  
Zeolite P

Synthesis of Zeolite 13X from Coal Fly Ashes and Properties of the Zeolite Products

2014 ◽  
Vol 675-677 ◽  
pp. 724-727 ◽  
Author(s):  
Wei Wei Tu ◽  
Yong Feng Zhang ◽  
Jie Bai ◽  
Wei Liu
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Uv Spectrophotometry ◽  
Zeolite 13X ◽  
Alkali Fusion ◽  
Coal Fly Ashes ◽  
Homogeneous Composition ◽  
Better Than ◽  
Good Agreement

Synthesis of pure-form zeolite 13X was investigated using the alkali fusion-hydrothermal method to dissolve Si and Al sources from fly ash, and with the addition of Si source, to prepare initial gel. Experimental results demonstrated, the regular morphology and homogeneous composition are in good agreement with standard zeolite 13X by characterization of XRD, SEM and IR. The properties of adsorption and CEC values were evaluated by BET and UV-spectrophotometry, respectively. All properties are much better than commercial zeolite 13X. Our results further revealed that like coal fly ash after alkali fusion pretreatment can be used for zeolite synthesis. Thus, It demonstrates a promising feedstock for the green synthesis of zeolites directly without experiencing intermediate chemicals.

Fabrication of Nano Zeolite P from Coal Fly Ash by Combining Alkaline — Fusion and Hydrothermal Reactions

2013 ◽  
Vol 591 ◽  
pp. 126-129 ◽  
Author(s):  
Yong Zai Wang ◽  
Le Wang ◽  
Hong Ming Xu ◽  
Shao Hui Luo
Keyword(s):  
Fly Ash ◽  
Single Phase ◽  
Hydrothermal Reaction ◽  
Coal Fly Ash ◽  
Reaction Products ◽  
Hydrothermal Temperature ◽  
Hydrothermal Reactions ◽  
Alkaline Fusion ◽  
Crystallite Sizes ◽  
Zeolite P

Well-crystallised nanozeolite P has been synthesized from coal fly ash by combined method of alkaline-fusion and hydrothermal reactions. The influence of preparation parameters, such as the proportion of fly ash/NaOH, the hydrothermal reaction temperature and time on the reaction products were investigated by XRD and FESEM. Results indicated that, the optimum conditions for fabrication of a single phase of zeolite P were the mass ratio of fly ash/ NaOH =1/1, fusion temperature at 550°C and hydrothermal temperature at 100°C for 48h .The average crystallite sizes of the zeolite samples are 29.4nm. The obtained products show crystal morphology heterogeneity comprised by various euhedral forms.

Adsorption of heavy metal cations using coal fly ash modified by hydrothermal method

Fuel ◽  
2009 ◽  
Vol 88 (9) ◽  
pp. 1714-1719 ◽  
Author(s):  
Marisa Nascimento ◽  
Paulo Sérgio Moreira Soares ◽  
Vicente Paulo de Souza
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Hydrothermal Method ◽  
Coal Fly Ash ◽  
Metal Cations ◽  
Heavy Metal Cations

scholarly journals Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20292-20302
Author(s):  
Nga Thi Dinh ◽  
Linh Ngoc Hoang Vo ◽  
Ngoc Thi Thanh Tran ◽  
Tuan Dinh Phan ◽  
Duc Ba Nguyen
Keyword(s):  
Methylene Blue ◽  
Fly Ash ◽  
Removal Efficiency ◽  
High Efficiency ◽  
Coal Fly Ash ◽  
Thermal Hydrolysis ◽  
Waste Coal

High efficiency of methylene blue adsorbent from waste coal fly ash by treatment with alkaline thermal hydrolysis.

scholarly journals Hydrocarbon Production from Catalytic Pyrolysis-GC/MS of Sacha Inchi Residues Using SBA-15 Derived from Coal Fly Ash

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1031
Author(s):  
Chakrit Soongprasit ◽  
Duangdao Aht-Ong ◽  
Viboon Sricharoenchaikul ◽  
Supawan Vichaphund ◽  
Duangduen Atong
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Fast Pyrolysis ◽  
Catalytic Performance ◽  
Hydrocarbon Production ◽  
Catalytic Upgrading ◽  
Alkali Fusion ◽  
Study Results ◽  
Sacha Inchi ◽  
Nitrogen Containing Compounds

In this work, Sacha inchi (Plukenetia volubilis L.) residues were used as biomass feedstocks in catalytic upgrading pyrolysis with SBA-15, which is a substance synthesized from coal fly ash (CFA), using alkali fusion, followed by hydrothermal treatment (SBA-15-FA). The catalytic activity of fly ash-derived SBA-15 was investigated through the fast pyrolysis of Sacha inchi residues for upgrading the pyrolysis vapors using the analytical pyrolysis-GC/MS (Py-GC/MS) technique. The pyrolysis temperature was set at 500 °C and held for 30 s while maintaining the Sacha inchi residues to catalyst ratios of 1:0, 1:1, 1:5, and 1:10. In addition, the SBA-15s synthesized from chemical reagent and commercial SBA-15 were evaluated for comparison. The non-catalytic fast pyrolysis of Sacha inchi (SI) mainly consisted of fatty acids (46%), including chiefly linoleic acid (C18:2). Other compounds present were hydrocarbon (26%) and nitrogen-containing compounds (8.7%), esters (9.0%), alcohols (6.4%), and furans (3.6%). The study results suggested that the SBA-15-FA showcased a high ability to improve aliphatic selectivity (mainly C5–C20) and was found to be almost 80% at the biomass to catalyst ratio of 1:5. Moreover, the increase in catalyst contents affected the enhancement of hydrocarbons yields and tended to promote the deoxygenation reaction. Interestingly, the catalytic performance of SBA-15 derived from fly ash could be compared to that of the commercial SBA-15 in terms of producing hydrocarbon compounds as well as reducing oxygenated compounds.

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