Author
Man Park
Bio: Man Park is an academic researcher from Kyungpook National University. The author has contributed to research in topics: Phillipsite & Cation-exchange capacity. The author has an hindex of 3, co-authored 3 publications receiving 78 citations.
Papers
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TL;DR: In this paper, Phillipsite was synthesized from the silica-poor fly ash by the hydrothermal treatment with 2N-NaOH solution at 105°C.
Abstract: Phillipsite was synthesized from the silica-poor fly ash by the hydrothermal treatment with 2N-NaOH solution at 105°C. Most of phillipsite was synthesized between 2 hrs. and 6 hrs. in the reaction time. The phillipsite synthesis mainly depended on the Al concentration of the liquid phase, and was taken place from the dissolution of the silicate glass and the amorphous Al compound. The cation exchange capacity (CEC) of the synthesized phillipsite was 198 meq/100g. The suggested process of phillipsite synthesis was (1) the dissolution of amorphous materials and condensed compounds of fly ash, (2) the dissolution of the sphere matrix of fly ash particles, (3) the supersaturation of liquid phase, (4) the phillipsite formation, and (5) the growth of phillipsite crystal.
69 citations
7 citations
TL;DR: The physico-chemical properties of the phillipsite derived from fly ash were investigated to evaluate the utility of the product in the various fields of industry and agriculture.
Abstract: The physico-chemical properties of the phillipsite derived from fly ash were investigated to evaluate the utility of the product in the various fields of industry and agriculture. CEC of the product was little affected by the suspension pH, and varied with the exchange cations in the following sequence : NH 4 + > K + > Ca 2+ . A rapid ion exchange reaction took place on the surface of the product. The synthesized phillipsite was stable below 250°C or above pH 3. The hypothetical chemical formula of the synthesized phillipsite would be suggested as follows : K 0.14 Na 0.86 (Al Si 1.84 O 5.68 ).nH 2 O. The proportion of the synthesized phillipsite in the product was estimated to be about 33.6%. It was considered that the product can be used for treating the poultry wastewater.
3 citations
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TL;DR: An overview on the methodologies for zeolite synthesis from CFA, and a detailed description of conventional alkaline conversion processes, with special emphasis on the experimental conditions to obtain high cation exchange capacity (CEC) zeolites is given in this article.
792 citations
TL;DR: In this article, the mechanism of zeolite crystallization and the role of alkali solution on the synthesis reaction were considered. And the changes in various physical and chemical properties, such as crystal structure, surface structure and cation exchange capacity, of the obtained zeolites and the dissolved amount of Si 4+ and Al 3+ in alkali solutions were investigated during the hydrothermal reaction.
410 citations
TL;DR: In this article, the silicon in fly ash can be used for the synthesis of a maximum of 85 g of pure zeolite per kg of fly ash prior to the residual being converted into Zeolite by the traditional method.
314 citations
TL;DR: In this paper, coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment and the maximum surface area of the product was found to be 383 m2/g with high purity.
Abstract: Coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. The synthesized zeolite was characterized using various techniques such as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, BET method for surface area measurement etc. The synthesis conditions were optimized to obtain highly crystalline zeolite with maximum BET surface area. The maximum surface area of the product was found to be 383 m2/g with high purity. The crystallinity of the prepared zeolite was found to change with fusion temperature and a maximum value was obtained at 823 K. The cost of synthesized zeolite was estimated to be almost one-fifth of that of commercial 13X zeolite available in the market.
293 citations
TL;DR: In this paper, a fly ash material was synthesized from fly ash by conventional and microwave-assisted hydrothermal alkaline activation experiments, which was studied as a function of temperature, time, and activation solution concentration.
Abstract: Zeolitic material was synthesized from fly ash by conventional and microwave-assisted hydrothermal alkaline activation experiments. The zeolite synthesis was studied as a function of temperature, time, and activation solution concentration. K+-Na+/NH4+ exchange properties of the zeolitic material synthesized were studied as a function of time and zeolite type. The zeolitic material synthesized from the same fly ash by changing the synthesis parameters contained: NaP1, hydroxysodalite, hydroxycancrinite, analcime, tobermorite, and nepheline hydrate using NaOH as an activation agent and F linde zeolite, kalsilite, and phil lipsite-KM zeolite from KOH activation. Synthesis yields and zeolite types obtained from the microwave and conventional experiments were very similar, but the activation time needed was drastically reduced by using microwaves (from 24−48 h to 30 min). Consequently, the industrial application of the synthesis process is enhanced by the microwave-assisted method. From this point of view, t...
276 citations