Thermal analysis applied for the removal of surfactant from mesoporous molecular sieves MCM-41 synthesized from gold mine tailings slurry

• Published in: Journal of thermal analysis and calorimetry 2017-11, Vol.130 (2), p.727-734
• Main Authors: Sari Yilmaz, Muge, Acaroglu Degitz, Ilayda, Piskin, Sabriye
• Format: Article
• Language: English
• Subjects: Absorbents; Analytical Chemistry; Chemical synthesis; Chemistry; Chemistry and Materials Science; Comparative analysis; Decomposition; Decomposition (Chemistry); Decomposition reactions; Gold; Inorganic Chemistry; Kinetics; Measurement Science and Instrumentation; Molecular sieves; Physical Chemistry; Polymer Sciences; Reaction mechanisms; Silicon dioxide; Slurries; Surface active agents; Surfactants; Tailings; Thermal analysis; Thermodynamic properties; X-ray diffraction
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-017-6490-2

The aim of the current study is to obtain the thermal behavior and kinetic analyses of the removal of surfactant from MCM-41 synthesized from tailings slurry at different heating rates. X-ray diffraction and thermogravimetric analyses were carried out to determine the characterization of the synthesized samples. Kissinger–Akahira–Sunose and Friedman isoconversional kinetic methods were applied for the purpose of determining the kinetic analysis parameters of the decomposition of surfactant from the mesoporous molecular sieves MCM-41 under non-isothermal conditions. For the comparison of these results, MCM-41 was synthesized from a pure silica source. The thermal behaviors of MCM-41 synthesized from tailings slurry do not differ from samples synthesized from pure silica during the decomposition reactions. The kinetic analysis’ results indicate that the decomposition reactions of the synthesized MCM-41 samples had complex reaction mechanisms.