Abstract
The aim of the research was determination of the influence of thermal treatment of the alumina (catalyst, washcoat or membrane precursor) in the range of temperature 550 - 850 °C and impregnated with TEOS solution, silica sol and cerium nitrate solution on stability of the obtained alumina precursors under hydrothermal conditions (temperature 150-225 °C, time 24 - 72 hours, water steam pressure up to ca 1.5 MPa). Influence of preparation parameters on hydrothermal stability was estimated on the base of porosimetry measurements. It was found that the best hydrothermal stabilization of alumina can be acquired by using of silica compounds, e.g. TEOS solution or silica sol. Double impregnation of alumina with TEOS solution and silica sol does not change noticeably good hydrothermal stability of alumina obtained in the case of single impregnation. In comparison to the TEOS hydrothermal stabilization efficiency of stabilisation of alumina by cerium oxide was very low.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
