Reusing of sodium silicate as a raw material in glass industry: byproduct of sodium borohydride production

Aysel  Kanturk; Muge Sari; Özgul  Dere; Sabriye  Piskin

doi:10.15626/Eco-Tech.2007.011

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Authors

Aysel Kanturk Yildiz Technical University, Department of Chemical Engineering, Turkey
Muge Sari Yildiz Technical University, Department of Chemical Engineering, Turkey
Özgul Dere Yildiz Technical University, Department of Chemical Engineering, Turkey
Sabriye Piskin Yildiz Technical University, Department of Chemical Engineering, Turkey

DOI:

https://doi.org/10.15626/Eco-Tech.2007.011

Keywords:

Sodium silicate; Reusing; Vitrification; Sodium borohydride; clean energy.

Abstract

Global energy and ecology problems continue to grow because of burning of fossil fuels,
environmental pollution, decrease of energy sources and difficulties in storing electricity.
Hydrogen has great potential to solve these problems as an environmentally clean energy
carrier and as a way to reduce reliance on imported energy sources. Hydrogen can be stored
and transported safely in the form of sodium borohydride (NaBH4) due to its high theoretical
hydrogen yield by weight (10.6%) in applications where H2 gas is used, e.g., proton exchange
membrane (PEM) fuel cells. NaBH4 is synthesized from boron minerals (borax, ulexite,
colemanite ... ) by the thermal-chemical reactions.
The main aim of this paper is the investigation of reusing of Na2SiO3, obtained from Na8H4
production based on the conversion reaction of borosilicate glass, as a raw material in glass
industry. The by-product, was defined as Na2SiO3 (PDF number: 00-016 -0818) by XRD (XRay Diffractometer) technique, was then vitrificated into a glass for utilization. The obtained
glass was characterized by scanning electron microscopy with energy dispersive spectroscopy
(SEM/EDS) analysis and FT-IR (Fourier Transformer-Infrared spectroscopy) techniques. The
results show that by-product Na2SiO3 can be reused as a raw material in glass industry.

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