Boron Oxide Production Kinetics Using Boric Acid as Raw Material

Boron oxide with a content of 99.93 wt.% from the dehydration of boric acid was synthesized. Conversion of boric acid to boron oxide was completed within 3 days at low temperature range (T < 130 °C) and approximately 30 min at high temperature range (T > 130 °C) for the isothermal dehydration...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 51; no. 34; pp. 11091 - 11096
Main Authors Balcı, Suna, Sezgi, Naime Aslı, Eren, Esin
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 29.08.2012
Subjects
Activation energy
Applied sciences
Boric acids
Boron oxide
Chemical engineering
Conversion
Data processing
Dehydration
Exact sciences and technology
Industrial engineering
Raw materials
Raw materials
Production
Kinetics
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Summary:Boron oxide with a content of 99.93 wt.% from the dehydration of boric acid was synthesized. Conversion of boric acid to boron oxide was completed within 3 days at low temperature range (T < 130 °C) and approximately 30 min at high temperature range (T > 130 °C) for the isothermal dehydration reaction in the temperature range of 80 and 350 °C. Apparent activation energies were 65 and 28 kJ·mol–1 for low and high temperature ranges, respectively. Thermogravimetric analysis (TGA) results showed that the reactions were nearly completed at around 330 °C, and activation energy for the first temperature region was found to be two-thirds of the isothermal value and the same for the second temperature region. Isothermal data analysis revealed that the apparent reaction order value was around 1.0 at low temperature range and decreased to 0.55 with temperature within the high temperature range.
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ISSN:0888-5885
1520-5045
DOI:10.1021/ie300685x