Determination of porosity into.supports for ceramic membranes of titanium dioxide by gamma spectroscopy

• Autor(a) principal: Oiveira, Elizabeth Eugenio de Mello
• Data de Publicação: 2017
• Outros Autores: Sicliliano, Umberto, Brandão, Luís, Carvalho, Paulo Victor Rodrigues de, Instituto de Engenharia Nuclear
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional do IEN
• Texto Completo: http://carpedien.ien.gov.br:8080/handle/ien/2307
• topic: Ceramic membranes; Titanium dioxide; Gamma spectroscopy

Membrane separation process (MSP) have been widely used to fractionate, concentrate and purify solutions, such as: food industry, pharmaceutical, water desalination and for treatment of the radioactive liquid waste in the nuclear industry. The MSP are more economical than traditional methods because most of them are athermic. Increased membrane application has led nto expansion of the manufacturing technology knowledge base, resulting in membranes with high permeability, improved selectivity and long-term stability. The demand for high operating temperatures and chemical resistance have simulated the development of inorganic structures, mainly porous ceramics. The materials most used to obtain ceramic membranes are oxides like Al2O3, SiO2, ZrO2 and TiO2 or combination of these. Despite the favorable characteristics, ceramic membranes has not been applied extensively, mainly due to the difficulty of obtaining porous structures without cracks and with adequate pore size. /the objective of this work is obtain a support of titanium oxide using potato starch as a pore former. The titanium oxide used is commercial, with average particle size of 0.13µm. Three suspensions were prepared containing 0,5 and 10% of the potato starch and the drying in spray dryer, obtaining a homogeneous and granulated powder, with flowability suitable for compaction. The supports were uniaxial pressing with 1.5 kgf.cm-2 and sintering at temperatures of 1050, 1100 and 1150ºC for 1h in oven resistance. The results showed that the porosity obtained by gamma ray transmission method was approximately 502%. This value is within range for applications as membrane support.