Abstract
To obtain catalytic porous supports with original properties, including alumina crystallographic phase, textural and acidity properties, the mecanosynthesis was investigated using the planetary ball milling process on commercial boehmite. Different combinations of milling parameters were explored to study the alumina phase transition. To rationalize all operating parameters, the energy transferred from the balls was estimated using a collision model. In the present work, boehmite transforms to χ-Al2O3, and then to α-Al2O3. All the tuned parameters can be condensed into only two independent variables that drive the alumina phase transition: the shock energy and the number of shocks. As a result, an alumina phase diagram has been established, highlighting the stability zones of boehmite, χ-Al2O3, and α-Al2O3. Additionally, the water vapor pressure induced by the dehydration of boehmite was also a key parameter to follow during milling. It could lead to boehmite reformation or the formation of tohdite and κ`-Al2O3 polymorphs.
Sign-in/Register to access full text options 
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.
