Vol.17, No.2, 2021, pp.385-395, doi:10.32604/fdmp.2021.011784
OPEN ACCESS
ARTICLE
Zeolite A Synthesized from Geothermal Waste Using Conventional and Microwave Heating for the Hydrothermal Treatment
  • Sulardjaka Sulardjaka1,*, Sri Nugroho1, Norman Iskandar1, Agus P. Adi1, Deni F. Fitriyana2
1 Diponegoro University, Semarang, 50275, Indonesia
2 Universitas Negeri Semarang, Gunungpati, Semarang, 50229, Indonesia
* Corresponding Author: Sulardjaka Sulardjaka. Email:
Received 29 May 2020; Accepted 24 December 2020; Issue published 02 April 2021
Abstract
Zeolite A has been successfully synthesized from geothermal waste with natrium aluminate and natrium silicate using conventional (C-H) and microwave heating (M-H) for the hydrothermal treatment. The products obtained for different aging times have been characterized using X-Ray Diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). It is shown that with the M-H process, zeolite can be formed at relatively low temperature (100°C) in a relatively short time (40 min). The crystallization of zeolite A has been found to be generally promoted by an increase of aging and synthesis time; however, it has also been observed that relative long aging times can transform it into sodalite. Zeolite A produced through the M-H process generally displays a smaller and more homogeneous crystal size with respect to that obtained with the C-H method.
Keywords
Geothermal waste; microwave-hydrothermal; conventional-hydrothermal; zeolite A
Cite This Article
Sulardjaka, S., Nugroho, S., Iskandar, N., Adi, A. P., Fitriyana, D. F. (2021). Zeolite A Synthesized from Geothermal Waste Using Conventional and Microwave Heating for the Hydrothermal Treatment. FDMP-Fluid Dynamics & Materials Processing, 17(2), 385–395.
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