Production and Characterization of Rice Husk Ash-Based Thermal Insulators for Heat Energy Saving Applications

Oko OE¹ , Mbakaan C.²

Section:Research Paper, Product Type: Journal-Paper
Vol.9 , Issue.3 , pp.7-14, Sep-2022

Online published on Sep 30, 2022

Copyright © Oko OE, Mbakaan C. . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Insulating refractories are usually produced and used for different applications to reduce energy losses and save energy. In this research, thermal insulators are made using the nanosilica-based ash generated from chemically treated rice husks. Typically, the rice husks were sieved and washed with deionized water. The husks were boiled in hydrochloric acid (HCl) and then soaked in Phosphoric acid (H3PO4) to further remove mineral impurities. The thermal insulators were formed by the pressing method and were fired at temperatures between 1000-1400 oC. The generated ash contains high silica content. The low thermal conductivity and enhanced mechanical and physical properties of the thermal insulators indicate that the insulators are suitable for heat energy-saving applications especially, in furnaces and other similar devices.

Key-Words / Index Term :
Thermal Insulator, Rice Husk Ash, thermal conductivity, Porosity, Pressing method

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