Microwave-Assisted Preparation of Sodium Silicate as Biodiesel Catalyst from Rice Husk Ash

Abstract:

In this research, sodium silicate (Na₂SiO₃) was prepared by rice husk ash reacted with 10 M sodium hydroxide. The mixtures were heated by microwave at 400, 600, and 800 watt for 5 and 10 minutes. The formation of sodium silicate was characterized by Fourier transform infrared spectrophotometer. The vibrations of (Na)O–Si–O(Na) and O–Si–O were observed at 595 and 1023-986 cm^-1, respectively, except at 800 watt disappeared those vibrations. The results of flame atomic absorption spectrophotometer provided the mole ratio of sodium and silicon was 2:1 as heating the product at 600 watt for 5 and 10 minutes. The phase of sodium silicate was characterized by X-ray diffraction. Sodium silicate could be used as catalyst as in biodiesel production from palm oil. The percentage of yield was 81 by volume.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 461-466
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.461
• Online since: August 2017
• Authors: Jaturon Kumchompoo, Wasinee Wongwai, Ratchadaporn Puntharod*
• Keywords: Biodiesel Catalyst, Microwave-Assisted, Sodium Silicate

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