Microstructure, Thermal Stability, and Catalytic Activity of Compounds Formed in CaO-SiO₂-Cr(NO₃)₃-H₂O System.

ABSTRACT: In this work, the thermal stability, microstructure, and catalytic activity in oxidation reactions of calcium silicate hydrates formed in the CaO-SiO₂-Cr(NO₃)₃-H₂O system under hydrothermal conditions were examined in detail. Dry primary mixture with a molar ratio of CaO/SiO₂ = 1.5 was mixed with Cr(NO₃)₃ solution (c = 10 g Cr³⁺/dm³) to reach a solution/solid ratio of the suspension of 10.0:1. Hydrothermal synthesis was carried out in unstirred suspensions at 175 °C for 16 h. It was determined that, after treatment, semicrystalline calcium silicate hydrates C-S-H(I) and/or C-S-H(II) with incorporated Cr³⁺ ions (100 mg/g) were formed. The results of in situ X-ray diffraction and sim

SUBMITTER: Niuniavaite D 

PROVIDER: S-EPMC7407582 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature