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Influence of temperature and alkaline activation for synthesis zeolite a from natural kaolin
Author(s)
Thungngern, Pimpreeya
Amnaphiang, Phanwatsa
Asawaworarit, Panuruj
Goodwin, Vituruch
Chollacoop, Nuwong
Date Issued
January 1, 2017
Type
Conference Paper
Abstract
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.
Citation
Key Engineering Materials, 751 KEM, 410-416, 2017