Nano Powder SiO2 from Rice Husk and its Industrial Applications: A Concept of Wealth from Waste

Abstract

The rice Husk (RH) is a renewable biomass product and through thermochemical processes like pyrolysis and gasification, silica-rich RH is transformed into biofuels (such as bio-oil, vapors, and charcoal) and biochar at the same time. RH catalysts can convert bio-oil into more renewable biofuel (biodiesel). Using RH silica materials to purify gas or undergo catalytic reforming, vapors from the breakdown of organic waste can be transformed into syngas, which have more value and can be utilized to create energy or make chemicals. Biochars created from RH are usually used to produce materials for silicon batteries, mend soil, clean up pollutants, and accomplish other things. This study looked at recent improvements in how RH silica products are created and how they can be used in the future, notably in manufacturing materials that benefit the environment and save energy. RH-silica compounds have environmental benefits, can eliminate organic and heavy metal contamination through integrated processes and adsorption, and are used as a catalyst in fertilization, and water purification, including gas cleaning. Lastly, biomass with a lot of silica could be a source of cheap starting materials for creating high-value silica/silicon compounds that can be employed in the actual world.