The synthesis of zeolites from this type of waste material is justified as the waste, whose disposal constitutes an environmental/ecological problem, is consumed. 56meqg1 for Na-X, Na-P1, and sodalite, respectively. Additionally, LOI analysis was performed on the LO fly ash according to the EN196-2:2005 standard. 0/, which permits unrestricted use, provided the original author and source are credited. 85C (Zarbska et al. The crystallization of Na-P1 zeolite is verified by the PXRD analyses (Fig.
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R. The cell parameters are calculated using the Rietveld method. blog here [31,65]. Controlled experiments were carried out, with Na2CO3/CFA mass ratio of 0. Anal.
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b the distribution of the pore structure (Na-X, Na-P1, sodalite)The basic textural discover here obtained for the zeolitic materials are shown in Table1. The research was performed using a Sartorius microbalance, model Electro, with a sensitivity of 0. conceived the experiments and analysed the results with the assistance of T. 1. The industry requires at least 90% pure products. 18.
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Isotherms for all samples are shown in Figures 7b, 8b, and 9b. Acta, 298 (1997)
55.
For many years, extensive research has been undertaken to investigate possible approaches to minimize SO
2
emissions from industrial sources. 7nm dominated with a maximum of approximately 3. When analyzing the experiment performed at 65 °C, appearance of Na-P1 zeolite is evident at 24 h.
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Thermogravimetric analysis conducted on sample at 91 h (65 °C) revealed a gradual and continuous water loss up to 1000 °C (Fig. Majchrzak-Kucba, Chemia i Inynieria
Ekologiczna, 9 (2002) 633. 98% purity at 65 °C (91 h) and 92. The endothermic browse around this web-site revealed by the DTA curve at 122 °C reflects the dehydration process and is in agreement with findings by Zubowa et al. Its presence in the sample has been also
confirmed by X-rayanalysis, proving that in the sample, being a fly-ash
modification, there were residuesof SiO2, CaCO3 ash apart from well crystallized Na-A
zeolite.
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The sorption experiments were performed at room temperature. When only tablet-compressed calcinated CFA was used as reactant (figure5a), there are only quartz and mullite in the product, showing that Na2CO3 is required to convert quartz and mullite into precursors for zeolites. heat and power plant. 01dm3 of 0. 1038/s41598-021-84383-7By submitting a comment you agree to abide by our Terms and Community Guidelines. Analysis of the textural parameters showed that Na-X displayed the best properties with a surface area of 166m2g1, which was much higher than that of Na-P1 (71m2g1) and sodalite (33m2g1).
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Acta, 276
(1996) 91. Escobar, J. Wu and X. Lovat et al.
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The synthesis products are analysed by X-ray diffraction, high temperature X-ray diffraction, infrared spectroscopy, scanning electron microscopy and inductively coupled plasma optical emission spectrometry. Gong, D. For Na-P1, sodium is also the main exchange cation in the structure balancing the charge of the aluminosilicate lattice. Zeolite synthesis reactions were carried out in a Teflon
reaction vessel placedwithin a temperature-controlled furnace, and in a thermostatic
bath equipped with astirrer. 3) shows,
maximumchanges of the endothermic thermal effect and sudden mass loss
caused by desorption ofwater from Na-A zeolite occur in the temperatures of 140160C.
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0, the phase-pure Na-A zeolite samples with good crystallinity are obtained. These spheres occur individually or form intergrowths. Zeolitization of coal fly ash (CFA) provides a potential alternative for creating high-added-value products from this hazardous solid waste. D. The analyses were taken at different temperatures: from 28 °C up to 1000 °C, every 100 °C.
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42. As the pore size of Na-A of 3–4 Å is much smaller than that of Na-X and is similar to the dynamic radii of N2, we did not measure the BET surface area of the synthesized Na-A sample. Endothermic peaks of commercial and fly ash-based Na-A zeolite
are similar,what proves the zeolite nature of the product obtained from fly
ash. 2mm. DeLa Torre, Environ. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
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Eng. The authors declare no competing interestsThis work was supported by National Natural Science Foundation of China (21271037, 21373036, 21573034 and 21771029) and the Chinese Scholarship Council (201706060254). .