Synthesis of Silica-Potassium-Nitrogen from Carbamide and Potassium Silicate by CO2 Precipitator

Ketut Sumada; Srie Muljani; Caecilia Pujiastuti

doi:10.4028/www.scientific.net/MSF.966.77

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HomeMaterials Science ForumMaterials Science Forum Vol. 966Synthesis of Silica-Potassium-Nitrogen from...

Synthesis of Silica-Potassium-Nitrogen from Carbamide and Potassium Silicate by CO₂ Precipitator

Abstract:

Potassium silicate is well known as a fertilizer and source of silica for plants growth. This study aims to infiltrate nitrogen from carbamide (urea) into potassium silicate solution to produced silica potassium nitrogen (Si-K-N) matrix by precipitation method using CO₂as precipitator. Potassium silicate in the range of 3-8% SiO₂ was obtained by extracting silica from geothermal sludge using potassium hydroxide solution. Carbamide is added to the potassium silicate solution allowed by mixing and flowing of CO₂ gas in reactor glass. The result of IR spectra indicated the presence of N-H groups, potassium and silica in the gel matrix produced from precipitation process while no N-H group appears in the gel matrix produced from precipitation in the absence of carbamide. X-ray fluorescence showed the composition of the product Si-K-N in the range of 40 to 50 %SiO₂ and in the range of 50 to 60 %K₂O.

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Periodical:

Materials Science Forum (Volume 966)

Pages:

77-82

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.966.77

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Online since:

August 2019

Authors:

Ketut Sumada, Srie Muljani, Caecilia Pujiastuti

Keywords:

Carbamide, Potassium Silicate, Precipitation, Silica Nitrogen, Urea

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