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Publikācija: Characterization of Porous Ceramic Pellets from Latvian Clays

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Characterization of Porous Ceramic Pellets from Latvian Clays
Field of research 2. Engineering and technology
Sub-field of research 2.4 Chemical engineering
Authors Līga Dabare
Ruta Švinka
Keywords porous pellets, illitic clay, porosity, sorption
Abstract Ceramic pellets from four different Latvian clay deposits were produced. Investigated clays have different compositions but the main clay mineral in those is illite. Pellets were shaped from plastic paste and sintered in four different temperatures – 700, 800, 900, and 1 050 °C. For each type of pellets characteristics and properties were studied. Mineral composition of these pellets varies depending on raw clay composition and sintering temperature. Calcareous clay ceramics contain anorthite, diopside, and calcium hydroxide, which elevates pH value of water after immersion of pellets. Non-calcareous clay ceramics contain spinel and hematite. Porosity and specific surface area are highly dependent on sintering temperature. Lower temperature presents higher porosity (15–25%) and specific surface area (up to 30 m2/g). Addition of sawdust elevates the porosity but diminishes the specific surface area through increasing sintering temperatures. The highest adsorption characteristics for all investigated ceramic pellets are shown towards iodine molecules (12.7 mg/g). Chromate and ammonia ions adsorption rates are much lower than iodine.
Hyperlink: http://www.lmaleidykla.lt/publ/0235-7216/2014/2/82-88.pdf 
Reference Dabare, L., Švinka, R. Characterization of Porous Ceramic Pellets from Latvian Clays. Chemija, 2014, Vol.25, No.2, pp.82-88. ISSN 0235-7216.
ID 19909