KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Asawaworarit, PanurujHas files: No

Search Results

Now showing 1 - 4 of 4
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Synthesis of Zeolite Y from Kaolin via hydrothermal method
    (2019-01-01)
    Krongkrachang, Pimpetch
    ;
    Thungngern, Pimpreeya
    ;
    Asawaworarit, Panuruj
    ;
    Houngkamhang, Nongluck
    ;
    Eiad-Ua, Apiluck
    ZeoliteY has been successfully synthesized via a two-step hydrothermal method with kaolin from Lampang province as a precursor. For the first hydrothermal, kaolin with an addition of sodium silicate (NaSi<inf>3</inf>O<inf>7</inf>) or tetraethyl orthosilicate (TEOS) was mixed with sodium hydroxide (NaOH) and autoclaved for 200<sup>o</sup>C at different reaction times for 6, 8 and 10 h, respectively. Sodium hydroxide and hydrochloric acid were added into the compound mixture to adjust its pH before it was formed into gel. After a second time hydrothermal at 90°C for 2 days, the solid product was filtered out, washed by deionized water and dried overnight. The zeolite was then characterized by X-ray diffraction spectroscopy (XRD) to identify type and crystallization, scanning electron microscopy (SEM) for morphology, Fourier transform infrared spectroscopy (FTIR) to identify its functional group and N<inf>2</inf> adsorption to study the adsorption/desorption isotherm and pore distribution. From N<inf>2</inf> adsorption-desorption isotherm, it is revealed that the zeolite obtained by this method have 571 m<sup>2</sup>/g surface area and pore size distribution around 4.89 nm.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Zeolite P from kaolin via hydrothermal method
    (2018-09-05)
    Eiad-Ua, Apiluck
    ;
    Amnaphiang, Phanwasa
    ;
    Asawaworarit, Panuruj
    ;
    Houngkamhang, Nongluck
    ;
    Chollacoop, Nuwong
    Zeolite P has been successfully synthesized from natural kaolin via two step hydrothermal process. The natural kaolin from Lampang, Thailand was studied for this research. In first hydrothermal, kaolin was mixed with sodium hydroxide solution at 200 <sup>o</sup>C for different reaction times from 3 - 5 hours, respectively.Sodium hydroxide and hydrochloric acid were added into the mixture to adjust their pH before they were formed into gel. Second hydrothermal process, the gel was kept of 90 <sup>o</sup>C for 3 days to obtain zeolite P. Synthesized zeolite P was characterized by X-ray diffraction (XRD) for identification the type and crystallization. Besides, the morphology was characterized by scanning electron microscopy)SEM.(The functional group was characterized by Fourier-transform infrared spectroscopy (FTIR). From this study, it was found that the increasing of reaction time in first hydrothermal activation and hydrochloric acid concentration lead to the high quality of zeolite P.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Influence of temperature and alkaline activation for synthesis zeolite a from natural kaolin
    (2017-01-01)
    Thungngern, Pimpreeya
    ;
    Amnaphiang, Phanwatsa
    ;
    Asawaworarit, Panuruj
    ;
    Goodwin, Vituruch
    ;
    Chollacoop, Nuwong
    Zeolite A from natural kaolin have been successfully synthesized via calcination and hydrothermal. However, these techniques have one drawback since, the impurities in kaolin such as muscovite and quartz in the kaolin structure, which depend on temperature and alkaline activation. This work was separated into two steps, first step was used calcination technique, and second step was used hydrothermal technique. Reaction of temperature in the first step was studied the influence of temperature from 500°C to 800°C for 3 hours. In this step, kaolin transformed to metakaolin and remain the impurities. Next, reaction of alkaline activation in second step was studied about the influence of NaOH. The concentration of NaOH in hydrothermal was varied from 1M to 4M and mixed with metakaolin at 90°C for 72 hours. X-ray Diffraction Spectroscopy (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) were used for characterization. The solid products were formed to zeolite A at 1M NaOH hydrothermal with 500oC to 800oC calcination and it can be seemed good of euhedral structure at 700oC.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Effect of alkaline activation on low grade natural kaolin for synthesis of zeolite A
    (2016-01-01)
    Asawaworarit, Panuruj
    ;
    Chollacoop, Nuwong
    ;
    Viriya-Empikul, Nawin
    ;
    Eiad-Ua, Apiluck
    The conventional technique to synthesizes zeolite A from kaolin is calcination. However, this technique has one drawback since, the impurities in kaolin, such as muscovite and quartz, remain. Therefore, the hydrothermal process without calcination is used to synthesize high purity zeolite A. Hydrothermal synthesis without calcination can be separated into two steps, namely first and second hydrothermal steps. Alkaline activation reaction in the first hydrothermal step was used to study the effect of NaOH concentration ranging from 4M, 6M, 8M, 10M to 12M at 200°C for 3 hours. In this step, sodium aluminosilicate (cancrinite and nepheline hydrate) was produced and then dissolved in HCl. After filtration, the impurity was removed, and adjusted for neutral pH of 7 to form amorphous aluminosilicate gel. For the second hydrothermal step, amorphous gel was mixed with NaOH (1-4M) to form zeolite A at 90°C for 3 days. The x-ray diffraction (XRD) and Scanning Electron Microscope (SEM) were used for characterization.